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#4665518 - 02/14/18 07:53 AM Axle fluid Ram 1500
2001SE Offline


Registered: 05/26/08
Posts: 19
Loc: New Brunswick, Canada
I have a 2014 Ram 1500 Sport 4X4 and want to change the axle fluid (I'm at 60 000KM). Want to go with Amsoil severe gear 75w90 for the front and 75w140 for the rear. Only thing manual says 75w85 for the front, is using the Amsoil 75w90 OK? Also it says to add Mopar limited-slip additive. Is there an alternative, or is the mopar the way to go?

For capacity Amsoil says 1 quart front and 2 quarts for the rear is this accurate?

Thanks


Edited by 2001SE (02/14/18 07:53 AM)

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#4665526 - 02/14/18 08:04 AM Re: Axle fluid Ram 1500 [Re: 2001SE]
barkingspider Offline


Registered: 12/22/13
Posts: 2077
Loc: socal
Using any 75w90 will work fine, amsoil is good but costs more. Check the correct weight for the rear. I would use 75w140 only if it is oem weight
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#4665530 - 02/14/18 08:13 AM Re: Axle fluid Ram 1500 [Re: 2001SE]
2001SE Offline


Registered: 05/26/08
Posts: 19
Loc: New Brunswick, Canada
Yes manual calls for 75w140 for the rear, it is LSD...

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#4665538 - 02/14/18 08:20 AM Re: Axle fluid Ram 1500 [Re: 2001SE]
2015_PSD Online   content


Registered: 09/26/10
Posts: 7463
Loc: SE Texas
Though there are other oils which can be chosen, Amsoil Severe Gear is arguably the best on the market. I would choose 75W-110 for the front axle (which is the upper viscosity that 75W-90 used to be before the J300 tables were updated) and 75W-140 in the rear. Amsoil can easily go 100K and beyond based upon my use and UOA's.


PS...happy birthday!
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2015 F-250 6.7L PS Diesel - Delo 15W-40/CQ Blue
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#4665546 - 02/14/18 08:28 AM Re: Axle fluid Ram 1500 [Re: 2015_PSD]
2001SE Offline


Registered: 05/26/08
Posts: 19
Loc: New Brunswick, Canada
Originally Posted By: 2015_PSD
Though there are other oils which can be chosen, Amsoil Severe Gear is arguably the best on the market. I would choose 75W-110 for the front axle (which is the upper viscosity that 75W-90 used to be before the J300 tables were updated) and 75W-140 in the rear. Amsoil can easily go 100K and beyond based upon my use and UOA's.


PS...happy birthday!


Thanks for the birthday wishes

Can you elaborate for the 75W110???

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#4665572 - 02/14/18 08:48 AM Re: Axle fluid Ram 1500 [Re: 2001SE]
2015_PSD Online   content


Registered: 09/26/10
Posts: 7463
Loc: SE Texas
Originally Posted By: 2001SE
Can you elaborate for the 75W110???
From what I understand, when the SAE J306 tables (a typo in my OP, it is J306 and not J300) were updated, the minimum and maximum kinematic viscosity ([email protected]) was adjusted and 75W-110 falls into the upper viscosity range that 75W-90 used to have before the adjustment. Pablo and Molekule can elaborate in more detail--PM one of them.
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2018 MB AMG GLC43 3.0L Coupe - Castrol 0W-40/Purflux
2018 MB C300 2.0L - M1 0W-40/OEM
2015 F-250 6.7L PS Diesel - Delo 15W-40/CQ Blue
2014 Explorer 3.5L Limited - M1 AFE 0W-20/FU

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#4665897 - 02/14/18 02:18 PM Re: Axle fluid Ram 1500 [Re: 2001SE]
bmwtechguy Offline


Registered: 06/15/04
Posts: 2682
Loc: South Carolina
Yes, use the OEM limited slip additive if you can. In my experience it has been better than the Amsoil. The Ford stuff is the best overall from what I have used.

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#4665900 - 02/14/18 02:21 PM Re: Axle fluid Ram 1500 [Re: 2001SE]
bmwtechguy Offline


Registered: 06/15/04
Posts: 2682
Loc: South Carolina
Yes, use the OEM limited slip additive if you can. In my experience it works better than the Amsoil. The Ford limited slip stuff is the best overall from what I have used. And the Amsoil SVG 75W-90 is closer to the OEM's recommended 75W-85 than the Amsoil 75W-110 is, FWIW.

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#4667487 - 02/16/18 07:36 AM Re: Axle fluid Ram 1500 [Re: 2001SE]
2001SE Offline


Registered: 05/26/08
Posts: 19
Loc: New Brunswick, Canada
I am going to go with Amsoil severe gear 75w90 for the front and 75w140 in the rear... Now for the transfer case, I have the BW 44-44 case with the auto 4x4 option, Amsoil says to use the Signature Series Multi-Vehicle Synthetic Automatic Transmission Fluid is that a good choice?

Thanks again!

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#4667888 - 02/16/18 02:06 PM Re: Axle fluid Ram 1500 [Re: 2001SE]
irv Offline


Registered: 10/08/06
Posts: 1253
Loc: Oshawa, Ont. Canada
https://www.bobistheoilguy.com/forums/ub...orn#Post4613084

I doubt your diffs are different than mine? Read your manual however as I believe it is 2 or almost 2 quarts for the front and roughly 1 1/2 for the rear.

Mobil has the LS additive right in it or you have to purchase the bottle that read LS on the front. I am leaning towards Amsoil myself but haven't mind up my mind yet?
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2017 Chevy Impala 3.6 Ltr.
2013 Ram Hemi Bighorn QC 4x4
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#4667918 - 02/16/18 02:43 PM Re: Axle fluid Ram 1500 [Re: 2001SE]
irv Offline


Registered: 10/08/06
Posts: 1253
Loc: Oshawa, Ont. Canada
Originally Posted By: 2001SE
I am going to go with Amsoil severe gear 75w90 for the front and 75w140 in the rear... Now for the transfer case, I have the BW 44-44 case with the auto 4x4 option, Amsoil says to use the Signature Series Multi-Vehicle Synthetic Automatic Transmission Fluid is that a good choice?

Thanks again!


Another one for you.
https://www.bobistheoilguy.com/forums/ub...flu#Post4646933
_________________________
2017 Chevy Impala 3.6 Ltr.
2013 Ram Hemi Bighorn QC 4x4
PP and/or PUP for both vehicles.

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#4667998 - 02/16/18 04:00 PM Re: Axle fluid Ram 1500 [Re: 2001SE]
Silverado12 Offline


Registered: 02/26/13
Posts: 3195
Loc: Central Virginia
FWIW my Challenger growls and "chatters" w/o the additive even w/synthetic oil.
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#4675008 - 02/23/18 01:55 AM Re: Axle fluid Ram 1500 [Re: Silverado12]
oldhp Offline


Registered: 06/28/12
Posts: 1685
Loc: USA
Originally Posted By: Silverado12
FWIW my Challenger growls and "chatters" w/o the additive even w/synthetic oil.


I use Red Line 75W90 in the rear gear of my '16 Challenger R/T 6 speed......quiet as church mouse.
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#4675015 - 02/23/18 02:31 AM Re: Axle fluid Ram 1500 [Re: 2001SE]
Nyogtha Offline


Registered: 10/13/14
Posts: 2344
Loc: San Antonio, TX
My 2012 Ram Big Horn 4X4 specs 75W-90 for the front axle in one place you look (printed OM) and 75W-85 in another place you look (electronic OM).

I'm convinced the 75W-85 is a Fiat thing while 75W-90 was a Daimler thing. I replaced the front axle gear oil at 33K miles after inspecting it and finding the level low. I used 1 qt then AAP brand 75W-90 synthetic + 0.5 qt Super Tech 75W-90 synthetic blend to top off and have had zero problems. I plan to replace that with 75W-90 Castrol Syntrax at 64K miles.
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