Rotella 85-140 gear oil???

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Mar 31, 2008 | 05:18 PM

#16

Hvytrkmech

Administrator ........ DTR's puttin fires out and workin on big trucks admin

Joined: May 2006

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Quote:

Originally Posted by DBLR

The update to use 75/140 was for the smaller rear ends in the 1/2 ton trucks and not the 3/4 and 1 tons with 10.5 and 11.5 diff's. Dodge still recommends 75/90 for trucks with 10.5 and 11.50 rear ends.

Thank you for the update, appreciate it.

Tim

Mar 31, 2008 | 10:00 PM

#17

C Schomer

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Joined: Feb 2005

Posts: 1,714

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From: Pueblo West

I did UOA until I found what works best for me and I haven't had good results with any syn 75w90 towing hard but 75w140 is good. I've had the least wear and best lube life with syn 85w140 in my diffs in Co. and in Az. Craig

Apr 1, 2008 | 07:49 PM

#18

D-Roc

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Joined: Oct 2006

Posts: 676

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From: Cold Lake, Alberta

I would have no problem running dino 80W90 in my diffs- I really don't care what dodge says, when my warranty is up I will be running whatever I please, I don't honestly believe that running synthetic is going to lengthen the life of my gears... As far as I am concerned if it is good for a tractor trailer then it is fine for my rig. Furthermore, I really don't place much faith in our dealers anyways.
JMO.