| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,156 Posts1,057,017 Members48,460 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Sep 2005 Posts: 254 Shop Shark | | Shop Shark Joined: Sep 2005 Posts: 254 | i know to run 80w90 but i was told that when running 80w90 in a tranny or t-case that your not spose to have any GL content in it, you could get by with GL-1 but GL-0 is preferable cause from what i unstood that GL stuff is the amount of rubber particles in the oil that help the oil stick to gears (in rear ends) and that it'll clog up bearings in a tranny or t-case thuss keeping oil out then causing them to fail so what kinda of oil should i run then? straight weight 30? or higher?
Nate | | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | Not quite true- You don't want to run straight GL-5 in older transmissions because it has hypoid additive that can pit synchros, but if you use a Gl4/GL5 rated gear oil you will be fine. Don't run straight 30. The GL spec stands for "Gear Lube" and is an API rating, has no bearing as to what is really in the oil.
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | |
|
|
| |
