Hi, please help..
I send my EVO 7 to a Brazil Misubishi dealer for fluid change...
After work is done I was told they filled all Trany with GL5 75-90 Oil.. is this ok?

Transfer case: GL5 75-90
Gear box : GL5 75-90
Rear diff: GL5 75-90

This is what they done.....

So far as I know gear box should use: GL 4 75-90
Is it Ok to use GL5 in the gear box?

Thanks a lot for all inputs.

 

GL-5 is more heavy duty. It has different friction modifiers in it that are made more for use in differentials and maybe transfer cases. Thicker then regular gear oil. It will destroy your bearings.

GL5 has different additive than GL4s

 

Thanks for the reply...
Please anyone elses reply?
Thanks a lot.

 

GL-5 is harmful to our brass tranny synchros and will eat away at them! Drain it out ASAP, fill with a GL-4, drive for a few miles, drain again, and refill with more GL-4. Straight 75W-90 GL-4 will be a bit on the thick side for our transmissions though, I personally mix 2 quarts of Redline MT-90 (75W-90 GL-4) with 1 quart of Redline MTL (7W-80 GL-4) so it equals about a 75W-85 mix which falls in Mitsu's recommended range. Your owner's manual will have most of these specs listed.