What Gear lube to use in Differentials,transfer and transmission

[Beach Toy]

So where do you find GL-4? jgth you are right, OUCH to try to dig through oil company websites. Dumb b----, when you call on the phone they say "sure it's OK to use", yet the bottle has nothing to back it up on it. Some websites show GL-4 product, but again dumb b---- can't tell you who carries it, or where you can buy it! I want to change transfer case lube, but I have to have something to put in that won't screw it up! This little beast will only see seasonal use, and hopefully will last another 10-15 years.

[billsmartis]

Summit racing has GL4 here and also sells quarts too Red Line Synthetic Oil 50305 - Red Line MT-90 Transmission Gear Oil – SummitRacing.com

Bill S

[obradleyo]

autozone has two options that say GL4 on the bottle. They have royal purple the is 15.99 a bottle and the have a cheap GL5 that is 3.99 a bottle.

[CodyJ]

odd obradleyo, go to advanced auto parts, they carry castrol 75w-90 for under $7. And 80w-90 too.

[jtgh]

way less than 10% cars have manual tranny today. so many dont support it.
sadly.
find the GL4 and stock up. buy it on sale at Amazon and ship it all in , bulk.

they sell it at ACE hardware for $8 rip price.

O'reillys has it.

Napa.

lots.

If its GL4 compat. it WILL be marked on bottle.

not like dextron AT , at all.