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#4613084 - 12/24/17 01:17 PM 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+
irv Offline


Registered: 10/08/06
Posts: 1143
Loc: Oshawa, Ont. Canada
Just curious, as my truck now has around 65,000 km's, I'd like to do some fluid changes. What is recommended or can be used in my diffs and transfer case? I like Amsoil severe gear but I am unsure about compatibility and if I need a friction modifier with my posi/limited slip rear diff? I use Mobil in my sleds chain cases and have used that previously in my other vehicles diffs so that is also an option.

Also, seeing as I am overdue for a plug change (Recommended at 48,000 kms) what are some good plugs to use (I need 16!) that are going to last a lot longer than 48,000 kms?
The manual says to remove and inspect them but if I am going that far, they are going to be replaced, end of story.

Also, while I'm at it, what other recommendations does anyone suggest that I do?

Thanks. cheers
_________________________
2017 Chevy Impala 3.6 Ltr.
2013 Ram Hemi Bighorn QC 4x4
PP and/or PUP for both vehicles.

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#4613106 - 12/24/17 01:41 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: irv]
CT8 Offline


Registered: 10/09/14
Posts: 11230
Loc: Idaho
Owners manual?
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4613113 - 12/24/17 01:44 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: irv]
xxch4osxx Offline


Registered: 03/11/09
Posts: 2614
Loc: Cedarbrae, Ontario
Trans fluid as well. If its still under warranty, use only a licensed ATF-4 fluid unless its the ZF trans.


Edited by xxch4osxx (12/24/17 01:50 PM)
_________________________
2015 RAM SXT Crew Cab 5.7 with 6 speed tranny.

2008 Mazda 3 GS Sport Hatchback 5sp MT (Girlfriend's car)


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#4613125 - 12/24/17 01:56 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: xxch4osxx]
irv Offline


Registered: 10/08/06
Posts: 1143
Loc: Oshawa, Ont. Canada
Originally Posted By: xxch4osxx
Trans fluid as well. Check the manual for viscosities. If its still under warranty, use only a licensed ATF-4 fluid.


I was thinking about that also, but wasn't entirely sure? When you did yours, assuming you did, did you also flush the torque converter?

My powertrain warranty will be over this coming June, in 2018, so by the time I likely get around to it, it will be close to being over anyways.
I was just wondering, as this is my first Dodge/Ram vehicle in eons, if numbers/requirements had changed much since then? I did some reading, back about 10 pgs, and I still see Mobil 75-90 syn is still fairly popular as far as diff fluids go.

I currently have some in stock but I am unsure if I have enough to do both diffs?
_________________________
2017 Chevy Impala 3.6 Ltr.
2013 Ram Hemi Bighorn QC 4x4
PP and/or PUP for both vehicles.

Top
#4613131 - 12/24/17 02:04 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: irv]
xxch4osxx Offline


Registered: 03/11/09
Posts: 2614
Loc: Cedarbrae, Ontario
Originally Posted By: irv
Originally Posted By: xxch4osxx
Trans fluid as well. Check the manual for viscosities. If its still under warranty, use only a licensed ATF-4 fluid.


I was thinking about that also, but wasn't entirely sure? When you did yours, assuming you did, did you also flush the torque converter?

My powertrain warranty will be over this coming June, in 2018, so by the time I likely get around to it, it will be close to being over anyways.
I was just wondering, as this is my first Dodge/Ram vehicle in eons, if numbers/requirements had changed much since then? I did some reading, back about 10 pgs, and I still see Mobil 75-90 syn is still fairly popular as far as diff fluids go.

I currently have some in stock but I am unsure if I have enough to do both diffs?
I have around 42,000kms on mine but I haven't done any fluid changes other than oil and filters on it yet. I plan on changing both diffs, trans and transfer case this coming spring. My owners manual shows 75w140 for the rear diff even though its a 1500 series. I have Amsoil Severe Gear that will be going in the diffs. The transmission in mine is a 65RFE six speed, so it will be getting an ATF-4 fluid. The transfer case I think uses transmission fluid but I will have to verify that.
_________________________
2015 RAM SXT Crew Cab 5.7 with 6 speed tranny.

2008 Mazda 3 GS Sport Hatchback 5sp MT (Girlfriend's car)


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#4613151 - 12/24/17 02:29 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: xxch4osxx]
irv Offline


Registered: 10/08/06
Posts: 1143
Loc: Oshawa, Ont. Canada
Originally Posted By: xxch4osxx
Originally Posted By: irv
Originally Posted By: xxch4osxx
Trans fluid as well. Check the manual for viscosities. If its still under warranty, use only a licensed ATF-4 fluid.


I was thinking about that also, but wasn't entirely sure? When you did yours, assuming you did, did you also flush the torque converter?

My powertrain warranty will be over this coming June, in 2018, so by the time I likely get around to it, it will be close to being over anyways.
I was just wondering, as this is my first Dodge/Ram vehicle in eons, if numbers/requirements had changed much since then? I did some reading, back about 10 pgs, and I still see Mobil 75-90 syn is still fairly popular as far as diff fluids go.

I currently have some in stock but I am unsure if I have enough to do both diffs?
I have around 42,000kms on mine but I haven't done any fluid changes other than oil and filters on it yet. I plan on changing both diffs, trans and transfer case this coming spring. My owners manual shows 75w140 for the rear diff even though its a 1500 series. I have Amsoil Severe Gear that will be going in the diffs. The transmission in mine is a 65RFE six speed, so it will be getting an ATF-4 fluid. The transfer case I think uses transmission fluid but I will have to verify that.


I believe you're right about the transfer case and it requiring ATF? My manual is in the truck and it's across the street so just being lazy and not wanting to currently retrieve it. smile

I also have the 6sp, it's the center console model. When I ordered my 13 Big Horn, I wanted the the 8sp but I was told they were currently sold out of those??
When mine arrived, many on the same truck had 8sps. shrug

75W-140 is surprising? Is your's the limited slip, or whatever Ram calls it?
_________________________
2017 Chevy Impala 3.6 Ltr.
2013 Ram Hemi Bighorn QC 4x4
PP and/or PUP for both vehicles.

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#4613179 - 12/24/17 03:11 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: irv]
Ethan1 Offline


Registered: 12/29/14
Posts: 1639
Loc: 'murica
Well, here's my suggestion. Grab the owner's manual. Check what specs your truck takes. Buy synthetic fluids that meet the specs. You're now two steps ahead of most people by simply changing your fluids and using synthetic. thumbsup

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#4613329 - 12/24/17 07:05 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: Ethan1]
irv Offline


Registered: 10/08/06
Posts: 1143
Loc: Oshawa, Ont. Canada
Originally Posted By: Ethan1
Well, here's my suggestion. Grab the owner's manual. Check what specs your truck takes. Buy synthetic fluids that meet the specs. You're now two steps ahead of most people by simply changing your fluids and using synthetic. thumbsup


I agree, and will definitely be doing this come spring when time permits.
Lots of Youtube vids about everything I need as well, but I did see a guy tonight suggest that dielectric grease be put on hemi's spark plugs threads! duh
_________________________
2017 Chevy Impala 3.6 Ltr.
2013 Ram Hemi Bighorn QC 4x4
PP and/or PUP for both vehicles.

Top
#4613440 - 12/24/17 09:33 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: irv]
HoosierJeeper Offline


Registered: 11/23/16
Posts: 1276
Loc: WI
For the plugs, I would use whatever is on the hood sticker. Might be copper cores and if that's what is OEM, use them and change them more often. It'll run worse on fancier plugs.
_________________________
15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)

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#4613470 - 12/24/17 10:13 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: irv]
Nyogtha Offline


Registered: 10/13/14
Posts: 2337
Loc: San Antonio, TX
My 2012 Ram 1500 5.7L Bighorn 4X4 has been running great on Autolite Iridium plugs since I used them to replace the original copper plugs at 30K miles.

My transfer case is the BW 44-44 so I bought the special Mopar BW 44-44 fluid via the internet for under $20 / qt.

My transmission is the 68RE and I did a simple pan drop & change of filters with ATF+4 at around 36K miles. Took 7.5 qts plus0.5 qt for the power steering.

My front differential uses 75W-90, the rear calls for 75W-140. Some documents recommend 75W-85 in the front differential but I'm not going to chase that.
_________________________
"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen

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#4613478 - 12/24/17 10:26 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: irv]
BrianF Offline


Registered: 02/25/15
Posts: 595
Loc: Sask, Canada
I did the plugs in my 2011 around the 87k mark. Looked perfect. Took me less than 3 hours with a beer and a kid to keep me company. The transfer case on that one did not have the auto 4x4 so it did not require any special friction modified fluid so Amsoil multi vehicle ATF went in, worked fine. The diff got Co-op gear oil SL, group 4 80w140. It has the friction modifier in it and worked like a charm. Many many hard towing miles and the fluid came out honey colored and next to nothing for debris.

The trans got Co-op ATF SL, group 4 synthetic and the Mopar filters. Worked just fine for many, many hard towing miles.
_________________________
2006 Trailblazer LT. Castrol Edge with Fram Ultra.
2017 Ram 3500 SLT Megacab. Duron SHP 10w30 with Hastings LF608.
1993 GMC 1500. It has oil and still runs

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#4613981 - 12/25/17 03:12 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: irv]
irv Offline


Registered: 10/08/06
Posts: 1143
Loc: Oshawa, Ont. Canada
Further looking at youtube vids, I wasn't aware or forgot, on the 2013's, there is no need to remove the diff cover as it has a drain plug.
Being anal, I'd like to remove the cover to spray brake cleaner in there to wash everything out but I am also thinking, maybe I'll just spray some in the fill/drain holes and wash it out that way?
I will make sure to either blow it out, ensure it's dry via paper toweling or the similar before I refill it.
Thoughts?
https://www.youtube.com/watch?v=5spRbhjo9uc

This guy also does the plugs but skips a lot of steps. Looks a little labor intensive but it's got to be done. Iridiums is what I am going with and if I understand correctly, longer life spark plugs now exist for this truck?

Thanks for the info so far. I appreciate it. cheers
_________________________
2017 Chevy Impala 3.6 Ltr.
2013 Ram Hemi Bighorn QC 4x4
PP and/or PUP for both vehicles.

Top
#4614038 - 12/25/17 04:40 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: irv]
Nyogtha Offline


Registered: 10/13/14
Posts: 2337
Loc: San Antonio, TX
Yes in 2012 MY the Ram Special Services came with 100,000 mile spark plugs from the factory.

https://www.allpar.com/squads/police-cars/ram.html

I agree having both a drain & fill plug on each differential is quite cool.
_________________________
"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen

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#4614529 - 12/26/17 10:07 AM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: irv]
BrianF Offline


Registered: 02/25/15
Posts: 595
Loc: Sask, Canada
My 2011 had the drain and fill plugs on the rear, long story short, there was a recall for under filled diffs from the factory and fill plugs that were too low in the diff which caused catastrophic failures. The first drain I found my diff overfilled past the fill plug so I maintained that level with the other changes.

I am not a fan of taking the cover off. Was the same with the trans pan. Ram likes to use RTV, which is a pain to clean up and re-seal. That alone took longer than the actual drain and fill.
_________________________
2006 Trailblazer LT. Castrol Edge with Fram Ultra.
2017 Ram 3500 SLT Megacab. Duron SHP 10w30 with Hastings LF608.
1993 GMC 1500. It has oil and still runs

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#4614676 - 12/26/17 12:35 PM Re: 2013 1500 Ram Hemi 4x4 Bighorn diff fluid change+ [Re: BrianF]
irv Offline


Registered: 10/08/06
Posts: 1143
Loc: Oshawa, Ont. Canada
Originally Posted By: BrianF
My 2011 had the drain and fill plugs on the rear, long story short, there was a recall for under filled diffs from the factory and fill plugs that were too low in the diff which caused catastrophic failures. The first drain I found my diff overfilled past the fill plug so I maintained that level with the other changes.

I am not a fan of taking the cover off. Was the same with the trans pan. Ram likes to use RTV, which is a pain to clean up and re-seal. That alone took longer than the actual drain and fill.


I wasn't aware of that? So just RTV no gasket? Like I mentioned, I'd like to clean in there but I am afraid some pockets exist that would allow all the fluid nor the brake clean to drain?
I guess it will be a game time decision whether I decide to take the cover off or not? I guess the best scenario is have everything prepared ahead of time and immediately pull the drain plug after a longish drive to make sure the oil is good and warm/hot.
_________________________
2017 Chevy Impala 3.6 Ltr.
2013 Ram Hemi Bighorn QC 4x4
PP and/or PUP for both vehicles.

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