Home

Transmission Pan Gasket?

Posted By: mctmatt

Transmission Pan Gasket? - 05/26/19 12:12 PM

Did a pan drop yesterday on my 07 flex fuel Impala. Put in 7 quarts of Castrol Dex VI along with Lubriguard Red and I think the Impala appreciated it. I exchanged the filter with a Hasting premium but the rubber gasket seemed very flimsy and was difficult to work with . Curiouser what gaskets others prefer be it rubber, cork, or whatever form you like.
Posted By: atikovi

Re: Transmission Pan Gasket? - 05/26/19 12:18 PM

RTV. Superior to any gasket you can use.
Posted By: demarpaint

Re: Transmission Pan Gasket? - 05/26/19 01:18 PM

I use a gasket and this: High Tack It has never let me down, and gasket removal for future pan drops or filter changes are very easy. I was never a big fan of RTV, unless it had to be used as a last resort. Opinions vary.
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/26/19 01:26 PM

Originally Posted by atikovi
RTV. Superior to any gasket you can use.


What he πŸ–•said. I just did my valve covers with permatex ultra black and zero leaks.
Posted By: Trav

Re: Transmission Pan Gasket? - 05/26/19 01:53 PM

If this is the 4T65E the best gasket is the reusable one you took off, you can reuse that one a few times. The floppy rubber ones with the filter kits are not very good, the OE is rubber coated steel. RTV is my least favorite gasket material, I don't use it for much anymore, it is inferior to a physical gasket in almost every application.
The last time I used it was for the intake ends on a GM 3400. If a gasket is available I use it with a little High Tack Demarpaint mentioned.
Posted By: nobb

Re: Transmission Pan Gasket? - 05/26/19 01:59 PM

RTV is only for stuff you never want to take off ever again. For something like a transmission pan where you want to service regularly, then you'll want to go with a gasket.
Posted By: mctmatt

Re: Transmission Pan Gasket? - 05/26/19 02:12 PM

Trav just to let you know I did reuse the OEM gasket that was on the pan as it was still in good shape and much easier to work with when laying under the car trying to line up and bolt in the pan, RTV I would think make that difficult keeping the pan aligned without messing up what you applied.
Posted By: demarpaint

Re: Transmission Pan Gasket? - 05/26/19 02:12 PM

Originally Posted by Trav
If this is the 4T65E the best gasket is the reusable one you took off, you can reuse that one a few times. The floppy rubber ones with the filter kits are not very good, the OE is rubber coated steel. RTV is my least favorite gasket material, I don't use it for much anymore, it is inferior to a physical gasket in almost every application.
The last time I used it was for the intake ends on a GM 3400. If a gasket is available I use it with a little High Tack Demarpaint mentioned.

thumbsup
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/26/19 02:19 PM

Originally Posted by mctmatt
Trav just to let you know I did reuse the OEM gasket that was on the pan as it was still in good shape and much easier to work with when laying under the car trying to line up and bolt in the pan, RTV I would think make that difficult keeping the pan aligned without messing up what you applied.


Take one of the bolts to your local hardware store and find a bolt or threaded rod with the same pitch and diameter. The idea is to make 2 or 3 lugs to put in the pan holes. You may need a hacksaw and file to deburr. Once you put the lugs in, put the pan back on and go around in a star pattern hand tightening bolts, once you get to one of the lugs you put in, take it out w/pliars and replace it with the bolt.

This is how I put my oil pan on using gasket maker, laying on my back under the car. Easy peasy, lemon squeezy
Posted By: Chris142

Re: Transmission Pan Gasket? - 05/26/19 02:19 PM

I like the gaskets that are some sort of compressed cardboard. Never had one leak in 30+ years of using them. Make sure to beat the pan straight if needed.
Posted By: Lubener

Re: Transmission Pan Gasket? - 05/26/19 02:26 PM

Originally Posted by atikovi
RTV. Superior to any gasket you can use.

Never use RTV for a transmission pan gasket. Once the excess is squeezed out, it will wind up caught in the filter. Any impurity on the surfaces and that RTV won't stick. Good luck if you ever had to tweek the pan bolts, it won't work. Best bet is get an OEM gasket, it likely will be reusable.
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/26/19 02:42 PM

Originally Posted by Lubener
[quote=atikovi]RTV. Superior to any gasket you can use.

Never use RTV for a transmission pan gasket. Once the excess is squeezed out, it will wind up caught in the filter. Any impurity on the surfaces and that RTV won't stick./quote]

Not if you a) don't over apply and b) let it cure for 24hrs before adding fluid and c) use a wire brush and brake cleaner. It's not like Niagra falls in your transmission or as if you have little gnomes in there hammering away. Once that stuff sets, it ain't going anywhere. And Permatex actually makes an anaerobic gasket maker that comes off relatively easy, where nothing more than a steady hand and a putty knife gets it open. It's specifically designed for use on oil/transaxle pans where servicing is required.

The nice advantage of a set in place gasket maker is it will fill in any undulations or surface imperfections in the pan, something preformed can't do.
Posted By: doitmyself

Re: Transmission Pan Gasket? - 05/26/19 03:13 PM

Nobody mentioned Felpro gaskets. Besides a quality OEM one, Felpro tranny gaskets tend to be very stout. They are made of a very dense composite rubber material and come packaged flat in a box. I prefer a gasket in most situations of repair work.
Posted By: Trav

Re: Transmission Pan Gasket? - 05/26/19 03:38 PM

Originally Posted by Mad_Hatter
Originally Posted by Lubener
[quote=atikovi]RTV. Superior to any gasket you can use.

Never use RTV for a transmission pan gasket. Once the excess is squeezed out, it will wind up caught in the filter. Any impurity on the surfaces and that RTV won't stick./quote]

Not if you a) don't over apply and b) let it cure for 24hrs before adding fluid and c) use a wire brush and brake cleaner. It's not like Niagra falls in your transmission or as if you have little gnomes in there hammering away. Once that stuff sets, it ain't going anywhere. And Permatex actually makes an anaerobic gasket maker that comes off relatively easy, where nothing more than a steady hand and a putty knife gets it open. It's specifically designed for use on oil/transaxle pans where servicing is required.

The nice advantage of a set in place gasket maker is it will fill in any undulations or surface imperfections in the pan, something preformed can't do.


Who has 24hrs to leave it? That would really jam up the works if you work on multiple cars a day.
Posted By: RyanY

Re: Transmission Pan Gasket? - 05/26/19 03:46 PM

Originally Posted by Trav
Originally Posted by Mad_Hatter
Originally Posted by Lubener
[quote=atikovi]RTV. Superior to any gasket you can use.

Never use RTV for a transmission pan gasket. Once the excess is squeezed out, it will wind up caught in the filter. Any impurity on the surfaces and that RTV won't stick./quote]

Not if you a) don't over apply and b) let it cure for 24hrs before adding fluid and c) use a wire brush and brake cleaner. It's not like Niagra falls in your transmission or as if you have little gnomes in there hammering away. Once that stuff sets, it ain't going anywhere. And Permatex actually makes an anaerobic gasket maker that comes off relatively easy, where nothing more than a steady hand and a putty knife gets it open. It's specifically designed for use on oil/transaxle pans where servicing is required.

The nice advantage of a set in place gasket maker is it will fill in any undulations or surface imperfections in the pan, something preformed can't do.


Who has 24hrs to leave it? That would really jam up the works if you work on multiple cars a day.


^this.
I always use OEM gasket if available, or Felpro if the OEM price is too high. Both are top notch. Other brands may be fine but rarely much lower price than felpro. I would consider RTV only as a last resort, for the reasons mentioned above.
Posted By: atikovi

Re: Transmission Pan Gasket? - 05/26/19 03:51 PM

Originally Posted by Lubener
Originally Posted by atikovi
RTV. Superior to any gasket you can use.

Never use RTV for a transmission pan gasket. Once the excess is squeezed out, it will wind up caught in the filter. Any impurity on the surfaces and that RTV won't stick. Good luck if you ever had to tweek the pan bolts, it won't work. Best bet is get an OEM gasket, it likely will be reusable.


And I suppose most of the car manufacturers have switched to RTV because? You do have to know not to lay it on too thick but that's not rocket science, and to wipe down both surfaces with solvent before applying. Anything that gets squeezed out will remain attached to the pan and go nowhere. Example on a rear end cover:

[Linked Image]

Cut gaskets are to RTV like lock washers are to Loctite. 50's or 60's technology that has been replaced with chemical thread lockers.
Posted By: JTK

Re: Transmission Pan Gasket? - 05/26/19 04:15 PM

I think we're talking a few different scenarios here. A machine at the factory that's applying an ultra consistent bead of RTV on a brand new part and mashing these parts together in a precise manner is going to be a reliable seal for a long time. On a home or shop job where some of the mating surfaces aren't new/clean, an actual gasket should be better every time. You could take your time and make a super nice bead of RTV, then shift the parts together and ruin it anyway.
Posted By: Red91

Re: Transmission Pan Gasket? - 05/26/19 04:27 PM

Rubber coated steel gaskets all the way. I hate cork, and recommend a modern replacement with better material if ones available. For instance, fel pro makes rubber coated steel valve cover gaskets for the pre '87 small block Chevy v8, and I see no excuse to ever replace them with anything else any longer. They also make a one piece rubber oil pan gasket for the pre '86 small blocks, which replaces the old four piece jobbers that were the stand by for years.
Posted By: Kibitoshin

Re: Transmission Pan Gasket? - 05/26/19 04:38 PM

Rubber coated steel on pans and covers that are meant to be easily removable (trans/diffs) and RTV for stuff that is not frequently serviced (engine oil pans/timing covers).
Posted By: slacktide_bitog

Re: Transmission Pan Gasket? - 05/26/19 04:53 PM

Get an OE gasket and an aftermarket pan that has a drain plug smile
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/26/19 07:41 PM

Originally Posted by atikovi
Cut gaskets are to RTV like lock washers are to Loctite. 50's or 60's technology that has been replaced with chemical thread lockers.


I usually round the bolt holes but never the less, nicely done.πŸ‘

And +1 on your comments. A common mistake people make is not cleaning the surface properly. And you're right on OE applications. My Kia doesn't have a serviceable trans other than a drain plug but the oil pan is and the OE calls for RTV. There is a FelPro for it but I opted for the RTV the last time I cleaned the oil pan and zero leaks!
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/26/19 07:58 PM

Originally Posted by Trav
Who has 24hrs to leave it? That would really jam up the works if you work on multiple cars a day.


Who has 24hrsπŸ‘‰πŸ‘‰ Me.πŸ˜‰, it's called planning ahead.

Maybe you should check out Permatex website because they make a RTV that you can fill immediately, putting the vehicle back into service immediately. Don't take my word for it, go check out their website.

The only valid reason for not using a gasket maker is a) fear due to inexperience with RTV and b) matter of preference (- just not wanting to use it) and c) time.

But whatever floats your boat. If you like using preformed just say you like using preformed and leave it at that.. but to insist that gasket maker is not a suitable alternative to a preformed gasket, is simply not based on facts and experience.
Posted By: sloinker

Re: Transmission Pan Gasket? - 05/26/19 09:01 PM

On modern cars replicate what the factory does. In the case of transmission pans I prefer a gasket and an aftermarket pan with a drain bung. I have had the misfortune many times to have to make repairs on leaking surfaces that someone used RTV on. Then the cleanup is on. Add that time to the overnight cure time and the convenience of RTV goes to zero.
Posted By: Trav

Re: Transmission Pan Gasket? - 05/27/19 03:52 AM

Originally Posted by Mad_Hatter
Originally Posted by Trav
Who has 24hrs to leave it? That would really jam up the works if you work on multiple cars a day.


Who has 24hrsπŸ‘‰πŸ‘‰ Me.πŸ˜‰, it's called planning ahead.

Maybe you should check out Permatex website because they make a RTV that you can fill immediately, putting the vehicle back into service immediately. Don't take my word for it, go check out their website.

The only valid reason for not using a gasket maker is a) fear due to inexperience with RTV and b) matter of preference (- just not wanting to use it) and c) time.

But whatever floats your boat. If you like using preformed just say you like using preformed and leave it at that.. but to insist that gasket maker is not a suitable alternative to a preformed gasket, is simply not based on facts and experience.


I have been working with silicone sealants for over 40 years since they made their first appearance in garages so I think I have more experience with it than most.

It is better than it was in those days but still has issues, first of all manufacturers use it because it is cheaper, less part numbers to store, no damage due to storage environment, etc.
The parts are new and can be machine applied, the parts also sit a while empty of fluids before finding their way to the assembly line, it is good enough but not ideal.

RTV has some undesirable properties such as heat cycle degradation and incompatibility with some compounds commonly fount in oil additives like esters.
Over the years we have seen many rtv sealed oil pans and engine cases develop leaks due to failed rtv. Subaru uses rtv a lot but has a lot of issues with it, many H6 engines require a tear down to reseal them at around 6 year, then there was the oil pump passage fiasco. Many Subaru mechanics found using an anaerobic sealant was safer and superior to the spec rtv.

Planning ahead in a garage environment is not possible, the time spent cleaning and surface prep is unacceptable time is money, the work place usually less than ideal as far as cleanliness goes eg even the red grease rags commonly used in garages tend to have contaminants in them which if used to wipe down can cause a poor seal with the rtv.
One drop of oil, trans, or diff fluid can ruin the rtv seal right from the get go.

It is not a matter of lack of experience or know how it is the reality of the environment it is being used in, in the repair business environment a formed gasket generally provides superior results over a long period of time.

Instead of coming here with stuff like check their website I suggest you educate yourself a little better.
Start with this article.

https://jalopnik.com/scion-fr-s-and-subaru-brz-owners-say-engines-are-catast-1833220101
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/27/19 02:52 PM

Originally Posted by Trav
[
Instead of coming here with stuff like check their website I suggest you educate yourself a little better.
Start with this article.

https://jalopnik.com/scion-fr-s-and-subaru-brz-owners-say-engines-are-catast-1833220101



Tx for the read..I cut to the bottom of the article and just as I suspected, user error is the prime suspect. Which is what I previously said, not everyone knows how to properly apply it. (you actually helped me prove my point, tx) People pick up a tube at the parts store and think, "I got this - what could go wrong!"... turns out a lot, if you don't know what the heck you're doing! The problem wasn't with the RTV, it was (likely) with the person applying the RTV.

I can not argue that in a high volume shop, preformed gaskets may provide some advantages over RTV. I say may because there are RTV's that do allow you to place the vehicle back into service immediately. But whatever, using a preform in that environment is an equally intelligent option likewise, so I'm not going to beat that horse any further. Use preform or whatever you think is best for your business, what do I care. But this discussion wasn't (originally) about whether or not RTV is the best option for shops, it was about it's suitability in a particular application. But again, I digress...

Fwiw, I used RTV for my tstat housing, valve covers and oil pan instead of preform. Not a single problem; no clogged oil passage ways, no floating itsy bitsy parts collecting in my oil filter or radiator - nada, zilch! I guess that just makes me a freaking God amongst men when it comes to using RTV - you guys hiring, maybe I could be your RTV specialist guy or give a class on how to properly use it??? (before you get ur panties in a wad, I'm just kidding🀣)

...oh, and since we're boasting about "experience" with RTV, I've been using the stuff personally and professionally for oh, maybe 30yrs now. So there's that..πŸ€”


Anywho... thanks for the discussion, it's been real and it's been fun...but not real fun. Have a great Memorial holiday!
Posted By: Trav

Re: Transmission Pan Gasket? - 05/27/19 08:56 PM

Yet in another thread you had trouble with an intake gasket and needed a friend to come over a drill it out for you, that doesn't sound like an experienced mechanic to me. Nuff said.

https://www.bobistheoilguy.com/foru...m-spark-plug-anyone-use-them#Post5115677
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/28/19 12:21 AM

Originally Posted by Trav
Yet in another thread you had trouble with an intake gasket and needed a friend to come over a drill it out for you, that doesn't sound like an experienced mechanic to me. Nuff said.

https://www.bobistheoilguy.com/foru...m-spark-plug-anyone-use-them#Post5115677




I'm also a pretty darn good cook but that doesn't mean I don't make mistakes in the kitchen from time to timeπŸ˜‰

And not to get nit picky but it was a bolt that sheared...but I can see how in anger you'd have gotten that mixed up. So no worries..

How's this Trav, you're right...1million % right and I'm wrong. Does that make your id/ego feel better?
Posted By: The Critic

Re: Transmission Pan Gasket? - 05/28/19 12:44 AM

Originally Posted by Mad_Hatter
Originally Posted by Trav
Who has 24hrs to leave it? That would really jam up the works if you work on multiple cars a day.


Who has 24hrsπŸ‘‰πŸ‘‰ Me.πŸ˜‰, it's called planning ahead.

Maybe you should check out Permatex website because they make a RTV that you can fill immediately, putting the vehicle back into service immediately. Don't take my word for it, go check out their website.

The only valid reason for not using a gasket maker is a) fear due to inexperience with RTV and b) matter of preference (- just not wanting to use it) and c) time.

But whatever floats your boat. If you like using preformed just say you like using preformed and leave it at that.. but to insist that gasket maker is not a suitable alternative to a preformed gasket, is simply not based on facts and experience.


What do you use to clean RTV? Do you have a secret method that makes the job go a lot faster (and safer)?

The #1 reason I dread using RTV is the clean-up. It adds a lot of time to a job that in this case, could have been avoided.
Posted By: clinebarger

Re: Transmission Pan Gasket? - 05/28/19 01:41 AM

No reason to use RTV on a 4T65E pan....The OE gasket is a very good piece!!

I HATE when I have to clean up RTV on a transmission that didn't call for it!!
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/28/19 02:12 AM

Originally Posted by The Critic
What do you use to clean RTV? Do you have a secret method that makes the job go a lot faster (and safer)?

The #1 reason I dread using RTV is the clean-up. It adds a lot of time to a job that in this case, could have been avoided.


The very nature of silicone based RTV makes using a chemical cleanup hit/miss. I personally would let it dry if I have that luxury, then hit it with a scraper and wire brush/wheel. But I've not found any one thing that makes cleaning up RTV a truly simple task. "Simple" being the operative word...i have tried WD40 and isopropyl alcohol in the past but meh, I don't think they really did anything IMO. But who knows, maybe I didn't do it right..I just don't see how either could be effective at breaking silicones chemical bonds.

Permatex does make a gasket dissolver for silicone based gaskets (you still have to remove the bulk beforehand). I've personally not used it so I can't vouch for it. But I would think since RTV resists solvents so well that any chemical remover is going to provide mixed results. But who knows, maybe the chemical engineers at Permatex have figured something out... maybe next time I'll pick up a tube to give it a try.

Obviously the best bet is to not over/miss apply. (duh statement of the day πŸ˜‚) I always have the RTV warmed up beforehand and do a practice bead before I start the actual application. I'm not perfect, I make mistakes to from time to time... nothing more annoying than having your dog crawl under the car next to you while you're working or one of the kids come out and ask a question or start bouncing a ball just as your starting to lay down some RTV πŸ˜ πŸ˜‚πŸ˜ πŸ˜‚
Posted By: The Critic

Re: Transmission Pan Gasket? - 05/28/19 04:04 AM

Originally Posted by Mad_Hatter
Originally Posted by The Critic
What do you use to clean RTV? Do you have a secret method that makes the job go a lot faster (and safer)?

The #1 reason I dread using RTV is the clean-up. It adds a lot of time to a job that in this case, could have been avoided.


The very nature of silicone based RTV makes using a chemical cleanup hit/miss. I personally would let it dry if I have that luxury, then hit it with a scraper and wire brush/wheel. But I've not found any one thing that makes cleaning up RTV a truly simple task. "Simple" being the operative word...i have tried WD40 and isopropyl alcohol in the past but meh, I don't think they really did anything IMO. But who knows, maybe I didn't do it right..I just don't see how either could be effective at breaking silicones chemical bonds.

Permatex does make a gasket dissolver for silicone based gaskets (you still have to remove the bulk beforehand). I've personally not used it so I can't vouch for it. But I would think since RTV resists solvents so well that any chemical remover is going to provide mixed results. But who knows, maybe the chemical engineers at Permatex have figured something out... maybe next time I'll pick up a tube to give it a try.

Obviously the best bet is to not over/miss apply. (duh statement of the day πŸ˜‚) I always have the RTV warmed up beforehand and do a practice bead before I start the actual application. I'm not perfect, I make mistakes to from time to time... nothing more annoying than having your dog crawl under the car next to you while you're working or one of the kids come out and ask a question or start bouncing a ball just as your starting to lay down some RTV πŸ˜ πŸ˜‚πŸ˜ πŸ˜‚

Thanks. I was mainly referring to removal of the RTV during the next pan removal. I usually use CRC gasket remover and plastic razor blades. It works well, but is time consuming. The removal process adds at least 15 minutes to the job.
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/28/19 04:52 AM

Originally Posted by The Critic
[Thanks. I was mainly referring to removal of the RTV during the next pan removal. I usually use CRC gasket remover and plastic razor blades. It works well, but is time consuming. The removal process adds at least 15 minutes to the job.



That's what I do..I really haven't found a way to speed it up. Sorry I wasn't any help there... maybe someone else has found something that helps speed up the removal process but I've searched YouTube in the past and I didn't come across anything that I thought was worth trying, besides the tried and true elbow grease. In that regards, preform has a definitive advantage over RTV.


Edit: maybe someone's tried a torch? Is it possible to just burn it off?? I know silicone is pretty heat resistant though - it has to be.
Posted By: PandaBear

Re: Transmission Pan Gasket? - 05/28/19 07:23 AM

I'm a fan of Felpro, then any reputable OEM or aftermarket. I personally don't trust Cork to last long enough, and RTV may be needed if the block has some sort of imperfect flatness (i.e. a hump over a shaft or cam, machining or casting "edge" that will have a hairline gap).

Maybe I'm lucky, most cars I have requires some minor amount of sealant at specific gap or corner in addition to the silicone gasket.
Posted By: Rhymingmechanic

Re: Transmission Pan Gasket? - 05/28/19 03:21 PM

I've had good luck with the gaskets that come with ATP filters. They're a gray fiber of some sort, with four small holes that just fit the bolts to keep the pan and gasket lined up together.
Posted By: nascarnation

Re: Transmission Pan Gasket? - 05/28/19 11:36 PM

Originally Posted by atikovi
RTV. Superior to any gasket you can use.



GM proved in the late 80s that RTV (even applied by robots) was a guaranteed warranty mess.
The very best gaskets (not often used in OEM because of cost) are elastomer coated metal with inserts at the holes which control compression of the gasket under the bolt clamp force.
Posted By: clinebarger

Re: Transmission Pan Gasket? - 05/29/19 01:38 AM

Originally Posted by nascarnation
Originally Posted by atikovi
RTV. Superior to any gasket you can use.



GM proved in the late 80s that RTV (even applied by robots) was a guaranteed warranty mess.
The very best gaskets (not often used in OEM because of cost) are elastomer coated metal with inserts at the holes which control compression of the gasket under the bolt clamp force.


That's exactly what the 4T65E uses....Well, More of a Vulcanized Rubber over a steel core with inserts.
Posted By: Jetsfan421

Re: Transmission Pan Gasket? - 05/29/19 02:20 AM

GM knew those 4T65E's were going to need a sturdy gasket. The things are always having problems...
Posted By: 4WD

Re: Transmission Pan Gasket? - 05/29/19 02:22 AM

They use them on rear ends … I reused the same one 3 oil changes in 8 years and traded trucks
Posted By: Trav

Re: Transmission Pan Gasket? - 05/29/19 05:51 AM

Originally Posted by Mad_Hatter
Originally Posted by Trav
Yet in another thread you had trouble with an intake gasket and needed a friend to come over a drill it out for you, that doesn't sound like an experienced mechanic to me. Nuff said.

https://www.bobistheoilguy.com/foru...m-spark-plug-anyone-use-them#Post5115677




I'm also a pretty darn good cook but that doesn't mean I don't make mistakes in the kitchen from time to timeπŸ˜‰

And not to get nit picky but it was a bolt that sheared...but I can see how in anger you'd have gotten that mixed up. So no worries..

How's this Trav, you're right...1million % right and I'm wrong. Does that make your id/ego feel better?


No need to get your panties in a wad, You supported an false statement and you got called out on it. RTV is not superior to any gasket as has been shown in this thread with just one trans pan gasket.
Posted By: 4WD

Re: Transmission Pan Gasket? - 05/29/19 10:26 AM

If RTV got applied by the OEM … I’ll never assume they made that choice because it’s better …
(Some other trade off in manufacturing)

The bonded steel and elastomer gaskets are resilient … therefore remain energized during temperature swings …

It’s hard for a tiny film of displaced tube goo to match the ability to β€œfeed” material after the fact …
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/29/19 06:56 PM

Originally Posted by 4WD
If RTV got applied by the OEM … I’ll never assume they made that choice because it’s better..


Because knowingly using an inferior gasket method sooo helps minimize warranty claims (comebacks) and class action lawsuits? Got it...
Posted By: kschachn

Re: Transmission Pan Gasket? - 05/29/19 06:57 PM

I don't get it, my two Toyota cars have FPG on both the #1 and #2 pans and neither one has leaked even after 20 years and nearly 700,000 combined miles. From what I've seen it is superior to a gasket, my BMW with a metal/elastomer gasket has started to leak more than once in the 10 years I've had it.
Posted By: 4WD

Re: Transmission Pan Gasket? - 05/29/19 07:02 PM

What are you calling inferior ?
Posted By: 4WD

Re: Transmission Pan Gasket? - 05/29/19 07:04 PM

Great … but I’ve never had a pan leak using gaskets …

Wrench monkeys are the biggest problem …
Posted By: demarpaint

Re: Transmission Pan Gasket? - 05/29/19 07:40 PM

Interesting debate. I'll still stick with gaskets and High Tack. If a gasket is not available and I can't make one, I might give RTV a shot. In 40+ years I might have used RTV once.
Posted By: Trav

Re: Transmission Pan Gasket? - 05/29/19 11:55 PM

Originally Posted by kschachn
I don't get it, my two Toyota cars have FPG on both the #1 and #2 pans and neither one has leaked even after 20 years and nearly 700,000 combined miles. From what I've seen it is superior to a gasket, my BMW with a metal/elastomer gasket has started to leak more than once in the 10 years I've had it.


That is because BMW has always used Nitrile instead of FMK and similar quality gaskets and seals, no reason for vanos seal failures either but they do because of the rubber used, it thermal ages. We see many almost 20 year old GM pan gaskets that are perfectly fine and have never leaked.
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/30/19 02:25 AM

Originally Posted by kschachn
I don't get it, my two Toyota cars have FPG on both the #1 and #2 pans and neither one has leaked even after 20 years and nearly 700,000 combined miles. From what I've seen it is superior to a gasket, my BMW with a metal/elastomer gasket has started to leak more than once in the 10 years I've had it.



If it's good enough for a 8k hp top fuel dragster or a 800hp stock car or my local transmission shop, it's good enough for me. If using a preformed over a FIPG makes you feel better, use a preform and more power to ya. I just don't subscribe to the notion that preforms are somehow universally superior v. RTV or even superior for this particular application and that they should be avoided at any cost. There are certainly situations where a preformed gasket makes more sense but you can make an equally compelling argument where using a FIPG RTV would hold an advantage over a preform.

At the end of the day everyone's got an opinion on it and I certainly have mine. So to each his own I say..
Posted By: Mad_Hatter

Re: Transmission Pan Gasket? - 05/30/19 02:29 AM

Originally Posted by demarpaint
Interesting debate. I'll still stick with gaskets and High Tack. If a gasket is not available and I can't make one, I might give RTV a shot. In 40+ years I might have used RTV once.


... and one (debate) that I'm sure that will go on long after I've left this world. πŸ˜‚
Posted By: demarpaint

Re: Transmission Pan Gasket? - 05/30/19 03:22 AM

Originally Posted by Mad_Hatter
Originally Posted by demarpaint
Interesting debate. I'll still stick with gaskets and High Tack. If a gasket is not available and I can't make one, I might give RTV a shot. In 40+ years I might have used RTV once.


... and one (debate) that I'm sure that will go on long after I've left this world. πŸ˜‚


You and me both.
Posted By: WyrTwister

Re: Transmission Pan Gasket? - 05/30/19 04:58 PM

I use Permatex non hardening sealant on the removable part , to " glue " the gasket on . After it has set , I then bolt everything together .

That way , if I have to remove it at a latter date , it is easier to clean off , on the removable part ( a pan ) . Or , in the case of a part that will be thrown away , no clean up needed ( water pump ) .
Posted By: Trav

Re: Transmission Pan Gasket? - 05/30/19 11:24 PM

Originally Posted by Mad_Hatter
Originally Posted by kschachn
I don't get it, my two Toyota cars have FPG on both the #1 and #2 pans and neither one has leaked even after 20 years and nearly 700,000 combined miles. From what I've seen it is superior to a gasket, my BMW with a metal/elastomer gasket has started to leak more than once in the 10 years I've had it.



If it's good enough for a 8k hp top fuel dragster or a 800hp stock car or my local transmission shop, it's good enough for me. If using a preformed over a FIPG makes you feel better, use a preform and more power to ya. I just don't subscribe to the notion that preforms are somehow universally superior v. RTV or even superior for this particular application and that they should be avoided at any cost. There are certainly situations where a preformed gasket makes more sense but you can make an equally compelling argument where using a FIPG RTV would hold an advantage over a preform.

At the end of the day everyone's got an opinion on it and I certainly have mine. So to each his own I say..


Where do they use RTV on a top fuel car with no cooling system? If anything manufacturers are moving away from RTV in favor of cored gaskets and silicone compound gaskets (not RTV) that fit into channels like many plenum and valve cover gaskets do.


Top fuel gaskets

https://www.circletracksupply.com/g...or-gm-602-circle-track-crate-engine.html
© 2019 Bob Is The Oil Guy