Differential Oil
Thread Starter
|
Fleet Mechanic
Joined: Mar 2004
Posts: 1,483
Likes: 1
From: SE PA
Differential Oil
While at the Ford dealer today, I picked up the differential oils for both axles as well as the friction modified for the Traction-Lok. (Sorry guys...just can't say "posi" for a Ford or Mopar.)
The rear calls for 75-140 synthetic gear oil, while the front (from what I read on-line) uses 75-90. The counterman tells me that Ford has discontinued the 75-90 for the front axle and now recommends the synthetic 75-140.
Does anyone have a thought on this? I bought enough to do both axles while I have the covers off. The 75-90 still shows up on line...but he's never been wrong about stuff like this before.
The rear calls for 75-140 synthetic gear oil, while the front (from what I read on-line) uses 75-90. The counterman tells me that Ford has discontinued the 75-90 for the front axle and now recommends the synthetic 75-140.
Does anyone have a thought on this? I bought enough to do both axles while I have the covers off. The 75-90 still shows up on line...but he's never been wrong about stuff like this before.
Lead Driver
Joined: Apr 2011
Posts: 8,259
Likes: 346
From: Northern California
I can point you to the Dana website but it is likely to confuse you even more then the ford guy just saying use this stuff.
The Dana specs vary depending on if the gear oil also lube the wheel bearing, how the axle is used, oil type and ambient temp.
Bottom line a synthetic 75w140 will work just fine if your operating in ambient temps of 40*+
From the Dana website
http://www2.dana.com/pdf/WESM-0060.pdf
The Dana specs vary depending on if the gear oil also lube the wheel bearing, how the axle is used, oil type and ambient temp.
Bottom line a synthetic 75w140 will work just fine if your operating in ambient temps of 40*+
From the Dana website
http://www2.dana.com/pdf/WESM-0060.pdf
Lead Driver
Joined: Apr 2011
Posts: 8,259
Likes: 346
From: Northern California
But considering -40c is also -40f I assume so.
Thread
Thread Starter
Forum
Replies
Last Post
xtal_01
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
3
Nov 16, 2015 08:16 PM
