LSD?

The Burning Rom · July 21, 2003, 08:47:05 PM

Um..that would be Limited Slip Differential...not the drug :wink: I was just reading this article "Ballistic Boosters", which was the T-Bird Super Coupe vs. the TGP. It was published in 1989 in Hot Rod magazine. Anyway, in the TGP specs, it says that it has a limited slip differential :shock: Is that true? The reason I ask, is because I've never seen it mentioned anywhere else. And the magazine also has the max boost listed as 7.5psi...not 9.5psi :roll: So I'm not sure if it's credible.

Also, I picked up some literature from the last car show, and it says that the TGP had the first 4T60HD transmission. I never new there was officially a HD version of the 4T60 (NON-E).

Chris A · July 21, 2003, 08:56:44 PM

There isn't an HD version that is identified as so. But there is a HD version of the 4t60. Not all 4t60's are created equal!

THe max boost is 7.5, thats what it is designed for. Fuel cutoff is at 9.5, but it should never see that in normal use.

Chris

idbeast · July 21, 2003, 09:37:09 PM

The diff is a limited slip, but if you like to burn your tires while turning corners it wears them out quickly!!! :shock: :shocked!: :drinking: :moon:

90TGP · July 22, 2003, 11:13:31 AM

So you're saying the TGP has an LSD? :shock:

idbeast · July 22, 2003, 12:01:49 PM

A LSD but it is not a Posi.

The Burning Rom · July 22, 2003, 12:46:44 PM

Quote from: idbeastA LSD but it is not a Posi.

'

What is the difference? Because I've browsed sites that say they are the same. I know my dad told me once that they aren't, but I can't remember why.

Formula305 · July 22, 2003, 02:23:30 PM

Posi-traction is just GM's name for their Limited Slip Differential. Ford calls theirs Traction-Loc.

mfewtrail · July 23, 2003, 08:02:33 PM

ford also calls them posi-locks don't they?....so what type of LSD is in the TGP's, a clutch type or what? I'm not too familiar with these things :oops:

Chris A · July 23, 2003, 08:35:47 PM

The regular TGP's do not have an LSD. I'm not familiar with which one did.

The terms for Positve Traction Differentials are many. For the most part unless its a Detroit locker, they are clutch type differntials.

GM used frequently used eaton differentials which used 4 coiled springs to preload the clutches, where ford and dana (used under all sorts of cars) used an "S" spring or no spring at all for preload.

Chris

4PASNU · August 02, 2003, 10:48:00 PM

OK, now I'm confused. Do they or don't they? Some are saying yes, some are saying no. I know when I stomp on it I hardly ever get both tires spinning. Has anyone out there ever ripped one apart to see?

Chris A · August 03, 2003, 07:33:22 PM

No NO NO!

They don't. What I meant was that there may have been a SPECIAL tgp that had an LSD.

The reason you don't really just burn one tire is as follows.

FWD

Equal length axle shafts

245/50/16 tires

There is alot of weight on the tires, the shafts are near equal in length so one won't wrap up more than the other, and the tires are pretty wide.

In a RWD car the torque transferred to the axle housing will tend to lift the right rear wheel, increasing the tendency to spin that wheel.

In a FWD car like the TGP, there is no torque transfer that would affect the weight on a wheel.

EDIT: I just looked at the article, and it does say limited slip in the specs. Maybe they thought it had one and just assumed it did.

god910 · August 03, 2003, 10:25:29 PM

Quote from: Chris AIn a RWD car the torque transferred to the axle housing will tend to lift the right rear wheel, increasing the tendency to spin that wheel.

In a FWD car like the TGP, there is no torque transfer that would affect the weight on a wheel.

So the rear of your car doesn't squat when you accelerate? Effectively vaulting the weight of your drivetrain into the air away from your wheels. Why do you think the Intense GTP (turbo) has wheelie bars. Just my .02

TurboGTU · August 04, 2003, 02:32:34 AM

:? I thing he ment by wheel to wheel. ON RWD the axle will try to rotate back and spin left. On FWD You might just HOP from the engine torquing back into the firewall (thats also when you see the back squat). Torque steer might be from the front engine mouts not holding as good as the trans mouts. Thats when the engine jumps up form the passenger side and torques into the firewall and causes the car to steer left. You'll get this even with a mini spool or LSD on FWD.

Chris A · August 04, 2003, 05:02:54 AM

Quote from: god910
Quote from: Chris AIn a RWD car the torque transferred to the axle housing will tend to lift the right rear wheel, increasing the tendency to spin that wheel.

In a FWD car like the TGP, there is no torque transfer that would affect the weight on a wheel.
So the rear of your car doesn't squat when you accelerate? Effectively vaulting the weight of your drivetrain into the air away from your wheels. Why do you think the Intense GTP (turbo) has wheelie bars. Just my .02

There is weight transfer, to the back of the car, but not torque transfer that would lift one wheel.