I have a 4x4 that needs to have the front and rear axle fluid changed.

I just want to be sure that they use the right fluid and quantity - anyone know what it takes?????

 

To start look at the owner manual , being that its a 07 .
From there its a matter of weather you want better than recommended ?
Synthetic or not , lots of opinions , I am changing to Amsoil , and heres my dealer . http://www.twinportsales.com/
He's got a dodge / Cummins & goes to a lot of the gatherings in the 5 state area .

 

Generally speaking going to a lube place you get what they have , and can get an attitude if you bring your own , probably many do it them selfs .

 

Its suppose to be a synthetic gear oil.80w90.I take my own fliuds and have for years with no gripes dealer or lube shop I use.Try www.amsoil.com they have listings for amounts and weights of fliud your year model calls for.

 

Isn't the synthetic 75W90?

 

It can be had both ways.Non synthetic or synthetic. AAM and Chrysler call for synthetic gear oils.

 

I used Synthetic AMSOIL 75w90 in both diffs. Ordered from a guy on here.

 

I thought synthetic was 75W90 and the 80W90 was non-synthetic. Are you saying that you can get either 75W90 or 80W90 in synthetic?

 

you talking to me?

 

Sorry about that, I was asking Hounddog. What you said is what I thought:

Synthetic comes in 75W90 and is what our diffs should have.

I thought that the 80W90 is regular gear oil and doesn't come in that viscosity as synthetic...

 

Oh.I call 75/90 or 80/90 the same.I never paid attention to one or other being synthetic or not.I go by label and contents.I see what your refering to.

 

I used to do the same and they're almost the weights.