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Differential oil

spattyvb

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G'day Rammers
What diff oil is everyone running in the 1500 dt 5.7.
I have a 3.92 diff occasionally towing
Thanks
 

Scram1500

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Haven't changed the front diff yet, but the rear got Amsoil 75W-140 with 5 oz. of Mopar friction modifier for the limited slip. The fill specification is just below the fill hole, between 3 to 6 mm to be precise. I used a zip tie bent at a 90 degree angle as a dipstick
 

cskindt

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I used this in my rear 3.21. No additional friction modifier necessary with LSD.
75W140 is available too.

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Front

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TC

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HSKR R/T

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G'day Rammers
What diff oil is everyone running in the 1500 dt 5.7.
I have a 3.92 diff occasionally towing
Thanks
Get a good synthetic in the same weight as specified in owners manual. If you have limited slip, ads friction modifier. If just an open diff, or the e-locker, no additional additives needed. I'm a fan of Lucas Oil myself
 

Mr.Grid

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I used Mobil 1 75w140 and Mopar 4318060AC Limited Slip Additive - 4 oz bottle in my 2011 Ram at 107k miles that had the same 3.92 gearing and limited slip diff as this 2022. This was towing 7k# 40% of those miles. That 2011 Ram had 179k miles when I switch to this new 2022. No diff problems.
 

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