KadinZ

1997 firebird formula, dont think i have an aftermarket differential..just bought the car, but when i did a burnout the other day..one tire spun, i thought they came stock with a posi..so, may someone explain to me maybe?

sdm1234

iTrader: (8)

limited-slip differential. it MAY be going on you...

KadinZ

what do you mean? you think its breaking?

Formula350

iTrader: (3)

If someone put in a new rear end and took it out of a V6 car, you could have 1 wheel wonder right now. And yes, that's what he means, it's going out, as in not working right any more.

KadinZ

see, i doubt the person before me did that, they put the headers on and the coil packs, also took car of the performance suspension for me..i dont think they would have put a P/O **** diff. in the back...but as i said, 1 wheel spins, and it does come with a 'limited slip' differential, limited slip is almost the same as a posi? or is a posi?

KadinZ

mk, well ill add this..my car also, when i bought it had slicks on it..and those things wouldnt lose traction if my life depended on it.

Elliott's94Z

iTrader: (12)

Thats exactly what he has going on..

KadinZ

ummskay, so im going to need a new differential...?

IronOutlaw

iTrader: (4)

You can find a used rear for around 1-200 bucks if you look hard enough. THe car i just bought does the one wheel peel and im gonna do some trading around cause ive got 3 rears at my house.

KadinZ

hmm..
so do you think it was probably broken when i bought it, or i broke it when i launched off every time i hit a red light?

KadinZ

mk, let me add something...i found one i can buy for pretty cheap, but its from a 1999 camaro Z28, he says there is an ASR switch in the dash you push for posi on demand or something, would i be able to buy that and put it in my car, and use it as a posi even though i dont have the 'ASR' button hes talking about?

IronOutlaw

iTrader: (4)

I think asr is traction control, but i may be wrong. It should work as long as your abs stuff hooks up the same and it should on a 1997 car.

The posi was probably worn when you got it. It works with clutches and when they get worn you dont spin both tires all the time. They usually wont break all at once.

KadinZ

mmkay, dont have traction control lol, but who uses it anyways right? ill ask my mechanic about it, or if anyone on here knows if it will fit right...just post it here, ill get it!

Formula350

iTrader: (3)

Here's the story: With slicks, I'm sure they burned out the posi.

Getting the 1999 rear would be nice to have since it uses a different posi style with all gears instead of clutches. People here have said though that it's not the best for drag racing, not sure why personally :\ The 99 will have .3" bigger rear brakes, but the e-brake system is different so you can't just hook your old stuff up. You'd have to get the rear cable setup as well. And further, the 99 have 4 channel ABS, and I'm not sure if even a 97 has that. There's are per-wheel where as ours is in the center of the diff, or 3-channel (front 2 wheels, rear diff).

I toasted my rear and got a 99 w/o ASR (traction control), but I don't have rear e-brake now. Not that I'm concerned about it.

You can also get JUST the carrier, and not the whole rear end. So you could get one from a 99+ (98 isn't Torsen, still Auburn clutch) and put it in your current rear. That would fix the problem. If you want to stick with Auburn clutch, then same deal, just get one from 93-98. Keep in mind, if you have ASR (TCS I think it's called too) then you'll want to find one with it. Which eliminated 93's since they didn't offer it. I'm sure you could tune it out if you wanted though.

KadinZ

UMMMMMMMM.... i understand half of what you said, the other half is a mystery...does this mean i'd have to do extra work to put the damn gear in? thats not what i'm going for, personally, i'd just like one that i would be able to slap on, bolt back in and be done with it.

oh, and i don't have traction control, so if i install one with it, i dont have to worry about anything right? its just a mechanism that isnt gonna be used right?

Formula350

iTrader: (3)

Having a traction controlled carrier or rear end shouldn't matter.

And now you're adding words to things You don't have to swap gears unless you want to. The carrier isn't the gears, it's what the ring gear bolts to. The carrier is the posi-unit essentially. You might want to Google about rear ends and posi to help you understand it more.

This is a good start for it all. Remember, you have Clutch, 99+ have Torsen.
http://en.wikipedia.org/wiki/Limited_slip_differential

Torsen specific:
http://en.wikipedia.org/wiki/Torsen

KadinZ

oh...yeah, errrr i mean BLAH the gears are seperate from the center piece right? dont the posi's have a spring-loaded thingy or something? most likely, i have an 4auto, so its probably umm....3.23 right? i might go to like 3.73 later, but right now i just want both the tires to spin, so would i be able to get the guys 'carrier', put it in my car and it should work right?:b ang::ban g:

DO I HAVE TO SWITCH THE CLUTCH TOO? if i have to do anything BUT change the 'carrier' tell me because if its anymore, i wouldnt be able to handle it..i have a couple other things more important to change, like get an actual exhaust on my car, and back springs.

S2K

You must have the option code GU5 to have the 3.23's, if you have(I believe) GU3 it's a 2.73 car. Should say in the glove box.

alamantia

iTrader: (10)

Change the fluid with regular conventional 80w-90 and a bottle of LSD additive and it will work again

KadinZ

im sure your right, 2.73..all i remember is that my gears are lower than a manual.