Limited-slip additive?

[TonyKarter]

GM makes a limited slip axle lubricant additive that I put in my '97 1/2 ton rear end. Are we supposed to add this at intervals to the G8 rearend? Please, no suppository jokes.

[R.Penguin]

The G8 differential is, I think, made by ZF in Germany or some such thing. There are a few wild eyed maniacs on here that have already swapped out for a different gear ratio. Perhaps they will respond.

I, myself just give it a squirt of K-Y every once innawhile. :p

[BSmith]

Just spit on it.

They have the additive at your local auto parts stores that works for most other rear ends. Not sure if it's compatible with our setup. Are you changing the fluid or something?

FWIW, I don't think we even have an LSD. If we do, it's the sorriest SOB out there.

[chiefpontiac]

Yes, its a LSD, similar to CTS and Solstice. The additive used to only be sold separate and had to be mixed with the rear-end fluid upon a change. GM now offers it "already in there" pre-mixed. And it IS in there from the factory so no additional attention is required by GM. In fact it is a no-touch, no scheduled maintenance, I believe, for the life of the powertrain warranty - for any of those still maintaining such.

It is not a locking rearend or even a positraction equivalent with corresponding wheel hop on corners consistent with solid axle posi's of the 60's and 70's but is limited, as it is named, providing a modicum of traction in slippery conditions.

[GeorgeInNePa]

Yes, its a LSD, similar to CTS and Solstice. The additive used to only be sold separate and had to be mixed with the rear-end fluid upon a change. GM now offers it "already in there" pre-mixed. And it IS in there from the factory so no additional attention is required by GM. In fact it is a no-touch, no scheduled maintenance, I believe, for the life of the powertrain warranty - for any of those still maintaining such.

It is not a locking rearend or even a positraction equivalent with corresponding wheel hop on corners consistent with solid axle posi's of the 60's and 70's but is limited, as it is named, providing a modicum of traction in slippery conditions.


:rofl:

:rofl:

:rofl:

[ronbuick]

I know alot of you guys can not beleive that this is a for life lubricant in the rear
diff and never change it, other wise you would not be on this board, I know most if not all are smarter than that, regardless, I will change mine out for the first time around 5K. miles then maybe every 30-50K miles after that.

Ron

[Chooch]

I asked this very question to the GM ace at the dealer and he told me, really no need but if it were my car, every 15-20k, less if you really get on it all the time. So that is my interval. SInce kids are in teh car 85% of the time I have not been able to truly test the LSD as much as my powersliding drifting arse wants to.

[13 QTR]

Just spit on it.

They have the additive at your local auto parts stores that works for most other rear ends. Not sure if it's compatible with our setup. Are you changing the fluid or something?

FWIW, I don't think we even have an LSD. If we do, it's the sorriest SOB out there.

really....hell I think mine is damn good. I've haven't had it spin just 1 wheel yet. that's at the track or on the street. I even did a 360 doughnut and there where 2 black marks all the way around.

[BSmith]

I'll try your method. I'd love to be wrong on that statement.

[13 QTR]

I'll try your method. I'd love to be wrong on that statement.

I'll do some good research this sunday. I got some 275/45-17 drag radials for this weekend...so I'll do some serious burnouts to see what happens. I'll try to get it video'd and put it up.

[99-LS1-SS]

Mine has turned both tires every time.

[GeorgeInNePa]

Mine has turned both tires every time.


+1

[BSmith]

It may have been a mistake on my part then. I do know that my Porsche 914 without a limited slip (independent rear with equal length axles) will spin both tires. Most front wheel drive cars will too, even with the different length front axles. Seems like my G8 is acting the same way, which is that both are spinning but around a turn they are not getting equal output. At least not equal like an Eaton in a 8.5" Chevy.

The more I think about it though, maybe it's just reacting differently than I am expecting. I know the Hertz rental Corvette seemed funny to me at times too.

Only thing worse than being wrong is not understanding what you are feeling to make you believe otherwise.

I'll make sure to do extensive testing to see if I can't figure it out though. It's for a good cause. ;)