[Adams.13]

im needing to change to fluid in my trucks trans and every where ive checked has fluid that say gl4 and gl5 i was wondering if it would hurt the trans any thanks.

 

[cart7881]

A quick Google check is not conclusive. Some sources say not to use GL-5 in transmissions. If you want to be absolutely sure, purchase the fluid from a Dealer. It may cost a couple of bucks more, but you only need 3 quarts and you won't be doing it that often. Someone who has a manual transmission will probably come by to provide more pertinent information.

The GM part number is 89021806. A quick search online shows it still available as GL-3

 

[gway]

Mobil 1 75w-90

 

[RidinBaseline]

To be safe get that manual trans fluid at the dealership. I read here a while back some guys complaining about the mobil 1.

 

[05 bow tie]

How many miles is on yours ? I changed mine out at maybe 90-100k and it was still gold and i kinda regret changing it seeing it still so clean. But i put in ams oil in mine. Now ive got a noise from mine when i let off the gas at freeway speed. so if you can id buy factory fluid if you want to change it.

 

[Adams.13]

mines got about 120k on it im not sure if its ever been changed or not

 

[gway]

I changed mine 2-3 times. Never had a problem.

 

[Okie50]

I use Redline MT-90 in mine with no problems.