2004 2500hd rear diff oil

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5,987
Location
Houston, Texas
I guess the HD version of that truck has the 11.5 american axle. I actually run 75w110 in mine. A good in between. I've heard of people running 75w140 but those were people who had a trailer behind them all the time.
 
Messages
3,341
Location
LONESTAR state
if you need 75w90 get mobil 1 if you need 75w140 get valvoline full synthetic I would run 75w140 since its HD, gonna hauling some heavy thing in future or near future ^^
 

Alltherage

Thread starter
Messages
236
Location
In the field
I spotted castrol full syn 75w90 this wknd at autozone for 5.99. Thought that was a great price. I assume that's good as well...noticeably cheaper
 
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