Can I use Valvoline synthetic 75w-90 gear oil in my 9.25 rear and Dana 44 front axles without worry? I looked through the D-I-Y threads and didn't see this weight oil listed. I have some at home and would like to use it if I can.

Also, I see that I need 2.5 qts for the front axle, how much do I need for the rear? And can I use the same weight in both?

Any help would be appreciated!

 

You'll be fine as long as you are not towing all the time. In that case I'd use 75w-140 and capacities and other info can be found in this thread in the FAQ section. https://dodgeforum.com/forum/2nd-gen...uid-types.html

 

Ok, I see that the D44 axle requires about 2.5 quarts. And am I reading it right that I should fill the rear axle to 5/8 of an inch below the fill hole?

 

I think I used 5.2ish quarts total

 

4.8 pints for the rear diff. I don't know why it's not in there. And the 5/8ths is correct, but it's really not that big of deal.

 

So about 2.5 quarts for each axle. Thank you for your help guys.

 

You might want to make sure the rear diff is not an LSD. You'll need a small bottle of additive if it is an lsd. Then again, I think the synthetic comes with it already. Not sure on that though.

 

Yeah, I forgot about that. I plan on jacking up the rear tonight to check the back brakes anyway. How does it work, if I spin one wheel, and the other wheel spins the same direction, it's and LSD. And if the other wheel spins in the opposite direction, it's open, right?

 

I forget, lol sorry ( I think your right though). But you can look on the sticker on top of the radiator support, or there should be a sticker inside your glove box. It will say "anti-spin"

 

I'll take a look when I get home tonight (don't have the truck wth me at work). If that fails, I did request a build sheet today, so if I have to I'll just wait 'til I get that. Thanks a ton for the help.