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05 GMC 2500 4L80E Fluid options #4528504
09/28/17 02:25 PM
09/28/17 02:25 PM
Joined: Oct 2007
Posts: 1,508
utah
dareo Online content OP
dareo  Online Content OP
Joined: Oct 2007
Posts: 1,508
utah
Okay so i have a 2005 GMC 2500 gasoline destroyer that has 190k on it now. Original trans is leaking and i happen to have a matching GM 4L80E Goodwrench trans new in the crate. Trans on the truck is fine other than the miles and leak. I've got a shop that will swap it for a good price. I can sell the still working 4L80E to someone looking to build a trans.

So, if you had a fresh 4L80E what fluid would you use? Dex VI? Something in the Dex III viscosity range? I'm tempted to spend the cash for Delvac 1 ATF. I don't tow heavy and this rig sees about 5k miles a year or less. Seems GM has back dated Dex VI for these units but some people say it doesn't work well while others praise it.


2016 Golf Wagon 5MT, 2014 Accord Sport 6MT, 2016 GMC 1500 SLT 6.2
Re: 05 GMC 2500 4L80E Fluid options [Re: dareo] #4528541
09/28/17 03:18 PM
09/28/17 03:18 PM
Joined: Dec 2002
Posts: 1,570
North Carolina
Rat407 Offline
Rat407  Offline
Joined: Dec 2002
Posts: 1,570
North Carolina
dexron VI will work just fine. Been running it, AMSOIL's version ATL in my 2002 Silverado's 4L60E now for 50k miles with 175k on the transmission with no issues.

Last edited by Rat407; 09/28/17 03:18 PM.

2002 Silverado 5.3 0w-20 AMSOIL
Re: 05 GMC 2500 4L80E Fluid options [Re: dareo] #4528641
09/28/17 05:39 PM
09/28/17 05:39 PM
Joined: Mar 2008
Posts: 6,829
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 6,829
USA
Maxlife ATF is good stuff. Plus, it may help with the leak, too.

If your transmission doesn't have a drain plug, get the Dorman pan smile

Re: 05 GMC 2500 4L80E Fluid options [Re: dareo] #4528717
09/28/17 06:58 PM
09/28/17 06:58 PM
Joined: Dec 2013
Posts: 2,191
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline
Joined: Dec 2013
Posts: 2,191
Fort Worth, Texas
4L80E's are not picky about fluid because the "straight through" nature of the unit.....One clutch applies right after the other for ratio changes unlike other designs that have to release one clutch at the same time another clutch comes on to change ratios.

I run Castrol Transynd in all my GM transmissions with great results, It's basically the same as TES-295 Mobil Delvac 1 but a little cheaper. I buy it at Inland Truck Parts for @ $38 a gallon.

Dexron VI will also work great.

I wouldn't be so quick to install a "Goodwrench" unit over a leak & mileage alone, I have tore apart hundreds of the Goodwrench Service Replacement Transmission Assembly (SRTA) units.....Not impressed! Most are 10 different units thrown together to make one working unit. It's so bad I WILL NOT buy cores with SRTA stickers on them.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto
Re: 05 GMC 2500 4L80E Fluid options [Re: dareo] #4528739
09/28/17 07:23 PM
09/28/17 07:23 PM
Joined: Jan 2009
Posts: 1,306
Watertown, New York
cronk Offline
cronk  Offline
Joined: Jan 2009
Posts: 1,306
Watertown, New York
Amsoil Torque Drive ATF is the thicker formula for HD transmissions. Similar to Castrol Transynd in application specs.
I would personally run Torque Drive or Amsoil Signature Series Multi vehicle atf.


2008 Ford F350
2003 Chevy Cavalier
2011 Nissan Quest
1986 Pontiac Trans Am
1940 Ford 9N Tractor
Amsoil lubes and filters!
Re: 05 GMC 2500 4L80E Fluid options [Re: dareo] #4528788
09/28/17 07:59 PM
09/28/17 07:59 PM
Joined: Dec 2013
Posts: 2,088
socal
barkingspider Offline
barkingspider  Offline
Joined: Dec 2013
Posts: 2,088
socal
Valvoline maxlife ATF all day on that transmission


06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: 05 GMC 2500 4L80E Fluid options [Re: dareo] #4528985
09/29/17 02:10 AM
09/29/17 02:10 AM
Joined: Oct 2007
Posts: 1,508
utah
dareo Online content OP
dareo  Online Content OP
Joined: Oct 2007
Posts: 1,508
utah
When you say STRA is that a grade of GM reman transmissions or are they all questionable? The one i have looks like a perfect brand new unit and doesnt say STRA.


2016 Golf Wagon 5MT, 2014 Accord Sport 6MT, 2016 GMC 1500 SLT 6.2
Re: 05 GMC 2500 4L80E Fluid options [Re: dareo] #4529013
09/29/17 04:42 AM
09/29/17 04:42 AM
Joined: Jan 2011
Posts: 2,719
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,719
N.Ohio
dex 6

Last edited by Lubener; 09/29/17 04:43 AM.

The "thinking" man's friend.
Re: 05 GMC 2500 4L80E Fluid options [Re: dareo] #4529316
09/29/17 11:12 AM
09/29/17 11:12 AM
Joined: Feb 2013
Posts: 10,707
Phoenix, AZ
Nick1994 Online content
Nick1994  Online Content
Joined: Feb 2013
Posts: 10,707
Phoenix, AZ
What's leaking specifically? Pan gasket?

Maybe just change the gasket and sell the crate transmission? It could probably bring a pretty penny.


2015 Hyundai Sonata 2.4L 84k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: 05 GMC 2500 4L80E Fluid options [Re: Nick1994] #4529428
09/29/17 01:37 PM
09/29/17 01:37 PM
Joined: Oct 2007
Posts: 1,508
utah
dareo Online content OP
dareo  Online Content OP
Joined: Oct 2007
Posts: 1,508
utah
Originally Posted By: Nick1994
What's leaking specifically? Pan gasket?

Maybe just change the gasket and sell the crate transmission? It could probably bring a pretty penny.


I haven't gone under to check the source of the fluid but it will slowly drip even when its not running. I suspect the pan gasket. I acquired two of these crate transmissions and it took a while to sell one. Most buyers just wanted a core they could build up, so i figure i might as well go to a fresh unit for my truck and sell a nice core to somebody for not much less money.

It needs a drive shaft bearing done too and i'm just too lazy to really work on it since its too big for my garage space and my driveway is sloped.
The truck also makes some wierd high pitch whine noise when its really cold outside, goes away in a minute or two.


2016 Golf Wagon 5MT, 2014 Accord Sport 6MT, 2016 GMC 1500 SLT 6.2
Re: 05 GMC 2500 4L80E Fluid options [Re: dareo] #4529663
09/29/17 06:22 PM
09/29/17 06:22 PM
Joined: Dec 2013
Posts: 2,191
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline
Joined: Dec 2013
Posts: 2,191
Fort Worth, Texas
Originally Posted By: dareo
When you say STRA is that a grade of GM reman transmissions or are they all questionable? The one i have looks like a perfect brand new unit and doesnt say STRA.


To my knowledge ALL Goodwrench automatic transmissions are remanufactured and all are the same grade, GM Performance Parts is selling NEW 4L85E's using leftover new parts from the Willow Run plant where all 4L80E were manufactured 'til it's closure in 2010 & the end of 4L80E production.

This is what a STRA rebuild tag looks like.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto
Re: 05 GMC 2500 4L80E Fluid options [Re: dareo] #4726366
04/14/18 12:07 AM
04/14/18 12:07 AM
Joined: Oct 2007
Posts: 1,508
utah
dareo Online content OP
dareo  Online Content OP
Joined: Oct 2007
Posts: 1,508
utah
Update: I finally got around to taking my truck and new 4L80E in to get installed. I used Fleetrite TES-295 spec fluid. Before it had the original 191k mile trans running on some maxlife ATF.

The result? Butter smooth shifts. I imagine this is what the truck was like to drive when it was new. My old trans doesn't have anything wrong with it other than wear. This new unit is quite the difference. Long story short, i put a brand new trans in a truck that didn't even 'need' it and couldn't be happier.


2016 Golf Wagon 5MT, 2014 Accord Sport 6MT, 2016 GMC 1500 SLT 6.2
Re: 05 GMC 2500 4L80E Fluid options [Re: dareo] #4738279
04/25/18 10:55 AM
04/25/18 10:55 AM
Joined: Jun 2002
Posts: 1,996
southwest Mo.
wtd Offline
wtd  Offline
Joined: Jun 2002
Posts: 1,996
southwest Mo.
Sounds like it was the right move. Hopefully you will get a long service life out of this new one.

I have a 98 chevy K3500 with this transmission in it and am currently running Supertech high mileage tranny fluid in it. I probably need to run something else in it because sometimes during the winter when it's really cold and the truck hasn't been driven in awhile, it take it a few seconds to go into gear. The truck only has 116,000 miles on it but I don't know how it was used before I got it when it had 94,000 miles on it.


2014 Mustang GT
1998 Chevy K3500
1998 Chevy K1500
(2) 1992 Cavaliers
1970 Monte Carlo
Re: 05 GMC 2500 4L80E Fluid options [Re: wtd] #4738731
04/25/18 06:05 PM
04/25/18 06:05 PM
Joined: Dec 2013
Posts: 2,191
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline
Joined: Dec 2013
Posts: 2,191
Fort Worth, Texas
Originally Posted By: wtd
Sounds like it was the right move. Hopefully you will get a long service life out of this new one.

I have a 98 chevy K3500 with this transmission in it and am currently running Supertech high mileage tranny fluid in it. I probably need to run something else in it because sometimes during the winter when it's really cold and the truck hasn't been driven in awhile, it take it a few seconds to go into gear. The truck only has 116,000 miles on it but I don't know how it was used before I got it when it had 94,000 miles on it.


The converter drains back through the Stator Bushings, Even a with new bushings the converter will drain back if given enough time.

It's when it does it overnight that you need to be concerned.

A good synthetic fluid will probably fill the Converter faster at low temps.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto
Re: 05 GMC 2500 4L80E Fluid options [Re: clinebarger] #4739110
04/25/18 10:49 PM
04/25/18 10:49 PM
Joined: Jun 2002
Posts: 1,996
southwest Mo.
wtd Offline
wtd  Offline
Joined: Jun 2002
Posts: 1,996
southwest Mo.
Originally Posted By: clinebarger
Originally Posted By: wtd
Sounds like it was the right move. Hopefully you will get a long service life out of this new one.

I have a 98 chevy K3500 with this transmission in it and am currently running Supertech high mileage tranny fluid in it. I probably need to run something else in it because sometimes during the winter when it's really cold and the truck hasn't been driven in awhile, it take it a few seconds to go into gear. The truck only has 116,000 miles on it but I don't know how it was used before I got it when it had 94,000 miles on it.


The converter drains back through the Stator Bushings, Even a with new bushings the converter will drain back if given enough time.

It's when it does it overnight that you need to be concerned.

A good synthetic fluid will probably fill the Converter faster at low temps.



Is synthetic recommended for these older transmissions? The reason I ask is that years ago, I used Mobil 1 synthetic tranny fluid in my 98 chevy K1500 with the 4L60E and it didn't seem to like it. The trans seemed like it was slipping. I changed back to a conventional fluid and the tranny seemed to operate normally again. I bought this truck new and it didn't have high mileage on it when I used the Mobil.


2014 Mustang GT
1998 Chevy K3500
1998 Chevy K1500
(2) 1992 Cavaliers
1970 Monte Carlo

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