DirtySpleen

So for my 1991 Camaro RS 305, ive gathered that for my AutoX, Drift, Road Race plans would be best suited by a 28 spline Eaton TrueTrac. According to this site, the stock t5 RS came with 3.08s, And as the carrier is 3.23+, Id have to get new gears. Anything else I would need? Looking to buy the needed parts to bring to a shop so they can't overcharge for ordering them, or risk getting the wrong one.

This is what I need, correct?
http://www.summitracing.com/parts/dtl-912a317/overview/

Ron U.S.M.C.

Is this really the proper L.S.D. for your application.
If the unit has to wait for a tire to slip than that's not what I would want.
Eaton says = http://www.eaton.com/Eaton/ProductsS...als/PCT_338418

The Eaton Posi. does not wait for tire slippage. It has pre loaded discs with 400lbs of pressure that increases with torque.
That's one of the reasons I chose it.
Heres what Eaton says= http://www.eaton.com/Eaton/ProductsS...als/PCT_339923

Heres some of the parts you will need besides the L.S.D.
1.ring and pinion =$ 200.00
2.master bearing kit = $ 90.00
3.axle bearings and seals = $ 30.00
4.installation/labor = $ 300.00 est.
5.and if you want ,a support cover = $ 160.00

big gear head

Yes, that is the one you need. If you are going to order from Summit then get a Yukon installation kit. Don't get any of the other kits that they sell. http://www.summitracing.com/parts/yga-14077/overview/

I recommend getting everything from Tom's Differentials. He has great prices on Eaton products and he has the best installation kits. He also has US Gear gears.

Another option for you would be to get a used Torsen from a '98 to '02 Z28 or Trans Am.

Check the RPO sticker on the bottom of the console lid, or on the back of the spare tire cover, and see what gear your car came with. The G codes are for the rear end.

DirtySpleen

Oh boy, just got 2 oposite opinions on the lsd haha. Ive heard that for my applications, a clutch type would wear out pretty quick, including the torsen. With the price of labor, id rather keep replacements down, and it would suck to wear it out quick.

big gear head

The Torsen and Truetrac are almost the same. Neither one has clutches. They both use gears for resistance.

The Truetrac will not let one wheel spin before locking the other side. That is what the Governor Lock does.

Ron U.S.M.C.

Go with what big gear head says. He knows his stuff.

I think Eaton needs to re-right there add because it’s misleading with apparently the wrong description.= http://www.eaton.com/Eaton/ProductsS...als/PCT_317264
I understand that L.S.D.s can work in different ways that's why I mentioned the "Posi" unit that works with applied Torque.

That's bough wheels pushing at the same time leaving the traction aspect out of it.

anobii

Wouldn't a spool be best suited for drifting? A limited slip especially the torque sensing type is designed to prevent wheels spin with softer engagement. In drifting I would think keeping the tires spinning at the same rate would be more predictable. I've only drifted solid axle go carts so I dunno, I'm just curious. I realize the streetability would suffer, but it seems like it'd be better at the track.

big gear head

A spool should not be used in a street car. A Detroit Locker would work for drifting, but a true drift car needs many more modifications that just a good solid rear end.

mjw2993

would a 95 z-28 rear end bolt up in my 88 camaro?

MoJoe

iTrader: (5)

Bolt up? Yes. But, the wider axle will push your wheels ~ 2" out on each side, requiring 4th gen offset wheels. Depending on your wheel preference, this may or may not be a problem.

anobii

A true drift car shouldn't be driven as a street car either. In a non street driven track car, wouldn't the spool be as effective as the locker?

Obviously a spool in a auto x or road race car is not a good option, which brings me to my next question aren't these three types (drift, auto x, road race) extremely different in suspension and steering setups? It doesn't seem like there would be a good median setup between the three, especially when drift is thrown into the mix.

LedZep

iTrader: (22)

I went with a SLP Posi out of a 4th Gen Z28, it's a gear design, which has proved itself longer than any other design that I am aware of and this is SLP which means you know it is good quality.

big gear head

That is the Torsen that I mentioned above.

big gear head

I agree.

LedZep

iTrader: (22)

One thing is you'll have to make sure you have 28 spline axles instead of 26 ones if you go with a 4th Gen SLP Posi. However they are easy to find online and pretty cheap, or at a local place.


Here is the SLP Posi:

sofakingdom

iTrader: (1)

That's not "SLP". Might have been sold by SLP, but it wasn't their product.

"SLP" didn't make any of those things. They are made by Zexel, a Japanese and later a German company, division of Bosch now actually. www.zexel.com The specific product in question is the "Torsen" (TORque SENsing) differential. www.torsen.com

That one was actually the stock unit in the Z28s & TransAms that SLP was building into SS & WS6 from 1998-2002.

The reason SLP was selling them a few years back was that those were the stock ones they took out, when putting in the other Zexel "heavy duty" version. They sold the stock take-outs for $99 from sometime around 99 or so until they ran out in maybe 04 or thereabouts. Obviously they couldn't take any more out once the Camaro/Firebird ceased to exist and their contract to modify them ran out.

Which is all of course not to say that they're not "good", or any such; only, to dispel some mythology about their origin.

DirtySpleen

If im not mistaken, my 91 rs comes with 28 spline axles.

big gear head

Yes, the '91 will have 28 spline axles.

LedZep

iTrader: (22)

The only thing about that posi is what you are limited to on your gears, the lowest ratio you can go is 3.23 on that unit.

big gear head

3 series 3.23 to 4.56, same as all 7.5 after market differentials.

LedZep

iTrader: (22)

oh yea, I was thinking about the highest ratio, my bad.

LedZep

iTrader: (22)

I have no relation to this ad, but I wanted to see what the going rate was for one and found my exact model:

http://www.ebay.com/itm/93-02-Camaro-Firebird-Zexel-Torsen-3-Series-Carrier-10-Bolt-7-5-7-625-/161278203616?pt=Motors_Car_Truck_Parts_Accessories&hash=item258cee16e0
IMO, that price is high; I think I paid under $150 for mine or maybe even less.


From what I found out SLP only made them for so many years, but even when they did it was based on the Zexel Torsen 3, just overhauled like all SLP parts.

sofakingdom

iTrader: (1)

SLP didn't "make" the ones they installed.

They bought them from Zexel.

But the one in the pic, just like yours, is the standard duty STOCK one, that GM put in the cars after they BOUGHT it from Zexel, that SLP then took out and sold after they put in the heavier duty ones that they also BOUGHT from Zexel. It is not "SLP" in any manner way shape or form except that it happened to pass through their hands.