Anything wrong with using API GL-5 80-90W "Limited Slip' Gear Oil in my 97 ?

[BrianSD_42]

Like the title says: Anything wrong with using API GL-5 80-90W "Limited Slip' Gear Oil in my 97 ?

User manual calls for API GL-5 80-90 or 90W

I could only find API GL-5 SAE 80-90W but it says limited slip on the front. I don't have a limited slip but isn't it the same oil? The specification seems to be the same so I'm thinking the limited slip text on the bottle is mainly marketing.

What do you think?

 

[KidVermicious]

It'll work fine. It has additives to prolong the life of a clutch-type limited slip diff, but they won't hurt anything.

 

[TheDurk]

Agree. Fine in the diff, just don't put it in a manual trans. Here is a BITOG thread on the question:

Choosing diff lube with/without NS additive | ATF, Differential, Trans, Brakes, P/S | Bob Is The Oil Guy

 

[BrianSD_42]

Thank you!

 

[StreetCreeper]

So I picked up some conventional Valvoline 80-90 gear oil the other day and only now do I notice it says "limited slip". I was planning to drain and fill both diffs and the transfer case on my 1997 LTD, but now I'm not sure if this whole "limited slip" additive is ok to use in the diffs and transfer case.

Any thoughts?

 

[KidVermicious]

So I picked up some conventional Valvoline 80-90 gear oil the other day and only now do I notice it says "limited slip". I was planning to drain and fill both diffs and the transfer case on my 1997 LTD, but now I'm not sure if this whole "limited slip" additive is ok to use in the diffs and transfer case.

Any thoughts?

It'll work fine. It has additives to prolong the life of a clutch-type limited slip diff, but they won't hurt anything.

:thumb:

 

[LittleCaesar]

The only problem one can run into with LS additive IMHO is when a rear end calls for it and none is added. Having been on the end of that not so fun result, know what you need.

 

[StreetCreeper]

:thumb:

Cool. I know it may have seemed weird to essentially ask the same question as Brian, but I figured I would ask again since he never specified if he was using it in both the diffs and the transfer case.

Anyways, it's good to know I don't have to return this. Many thanks :biggrin2:

 

[StreetCreeper]

The only problem one can run into with LS additive IMHO is when a rear end calls for it and none is added. Having been on the end of that not so fun result, know what you need.

I'm a bit surprised at the lack of gear oil selection at the local shops. I'm starting to think that many people just throw whatever they find into their vehicles and call it good.

 

[gamefreakgc]

I'm a bit surprised at the lack of gear oil selection at the local shops. I'm starting to think that many people just throw whatever they find into their vehicles and call it good.

Yes. I'm currently running 75w-90 in my tcase and differentials since 80w-90 was hard to find (per fsm supposed to be 75w-90 in diff). Even AMSOIL didn't have 80w-90 and told me to use 75w-90 (theirs was way too expensive though).

 

[KidVermicious]

I'm a bit surprised at the lack of gear oil selection at the local shops. I'm starting to think that many people just throw whatever they find into their vehicles and call it good.

Nonsense! Who does that? Oh wait, I do that.

Seriously, for our purposes, the difference between a 75w and 80w oil is negligible.

 

[jgue467]

... many people just throw whatever they find into their vehicles and call it good.

I called it good with wally's (supertech) 75-140 synth gear oil....lol :cowboy:

 

[gamefreakgc]

Yeah, it's not gonna hurt anything. It's like the difference between 0w-30 and 5w-30 in the engine, Toyota says it's fine for either if you live in the right conditions to justify it. It gets hot where I live so the 75w is probably better anyway.

The point is having the right amount and clean oil in there.

 

[LittleCaesar]

I'm a bit surprised at the lack of gear oil selection at the local shops. I'm starting to think that many people just throw whatever they find into their vehicles and call it good.

I buy mine at a local Napa that carries everything, even a straight 90 weight. But for the most part you are correct, the selection can be lacking for most retailers. Gear oils can be treated worse than brake fluid when it comes to replacement.

 

[19963.4lsr5]

I called it good with wally's (supertech) 75-140 synth gear oil....lol :cowboy:

Me too. 75w140 synthetic in the rear and their semi synthetic 75w90 everywhere else.

 

[pluton]

Doesn't the book say 75W-90 for the front w/ADD?

 

[gamefreakgc]

Doesn't the book say 75W-90 for the front w/ADD?

Yes it does. But it varies on components and climate to range from 75w-90 up to straight 90.