2002 HD Questions

[regcab02HD]

I have a 2002 HD 4x4 with the MW3 5-speed manual transmission. I'm going to change the trans fluid and was wondering what type to use. I use Mobil 1 synthetic 75w-90 in the front and rear diff. Can I use this in the transmission too? The owners' manual says to use 75w-85 GL-4. The Mobil 1 is GL-5. Will it be ok?

I also have a problem with the transfer case leaking around the gasket where the two halves are put together. Is it fairly easy to replace or do I have to worry about something falling out of place when taking it apart?

What's a good brand of fluid to use in the t-case? I bought some Quaker State full synthitic Dex. III. It was the more expensive stuff they had a O'Reilly so I figured it should be some good stuff.

Can anyone tell me how many quarts of oil the front and rear differentials, trasfer case, and transmission take? I believe the diffs. take 2 and 4 quarts but can't remember.

 

Thanks