Does it matter which you use in a Transfer Case, auto trans fluid or diff/gear oil? I have a 98 Blazer LT 4x4... I can't seem 2 find what I am looking for on youtube so I figured I would find out what I need 2 know from you folks, thanks.

 

I was told u can use atf but if u have the 4-button tcase then it has to be the gm autotrak fluid

 

Agreed. DO NOT use gear oil!

 

I have the 3 button switch on the dash... So ATF is ok 2 use then or should I use Diff/Gear oil?

 

ATF it is then... Thanks for the help

 

I was mistaking the 2 again... never swapped out that fluid yet...

 

You're welcome.

To elaborate a little, your transfer case has an oil pump that lubes it. Gear oil is too thick for the pump to properly move.

 

I had to find it all out as I got into an argument with my uncle saying I could put stuff in all transfer cases and had to prove the 4 button auto cases use autotrak and the non auto is atf

 

Your owners manual will list it or you can call a GM dealer with your VIN and they will tell you what you need.

Especially for the Auto 4wd transfer cases (4-button), you can danage tee transfer case unless you put in the correct fluid.

 

I have the 3 button switch on the dash... So ATF is what I need