What is the strongest rear out of a fourth gen that is a limited slip?
Thanks,
Will

 

They're all equal in strength.

 

Basiclly alla samesame

 

I was kinda wondering the same, i have a bad one in my 84. I found a 98 4th gen at a fairly close jy for $200. Is there any differences between the v6 and the v8 besides maby brakes? I dont know anything about it besides its disc brakes, im going tomorrow to look at it so any advise is good.

 

all i can say is do your research before you try it because i was going to do the same and kinda got overwhelmed with the differances between the 82- 89 brake system mine is a 92 with drums..it can be done if you have time and tools and will be cool......dont forget that the fourth gen rear is wider and the backspacing on your wheels will change.but you can use fourth gen wheels and solve that....

 

Thanks, Iv already got disc brakes, and thats why im going with the 98 becasue its slightly shorter than the 93-97, and its time to get some new tires and rims anyway, so this just gives me a good excuse to.

 

i'd think the least likely to break would be a non posi rear, since it'd not apply the power to the ground as well.

 

I would like to get a limited slip and was wondering if they are all the same in the fourth gen cars. I know that there were a few different LSDs in our cars and from what I've found the Gov-Lock is a piece of junk. I don't want to swap in a fourth gen rear and find out I got a piece of junk after getting new wheels and tires, I already have a Gov-Lock.
Will

 

this is a locker its was in a 99 ls1 rear i was told its the best if you dont have 450whp

you just have to remove the rear covert while there you can count what gear you have

 

I am interested in if anyone has put a complete 4th gen rear end in their car, I know that it is is 1 inch longer on each side but was there any other issues and did you run you third gen wheels? if so , how bad did they stick out?

 

That's not a locker, it's the upgraded LSD. Probably came out of a WS6 or an SS. That is the preferred differential as it is stronger and rebuildable as opposed to the cone type Auburns.

 

So if that isn't an Aburn what is it?
Will

 

That would be and Auburn. The coned-screw diffs are torsions. The Auburn is what you want.
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Also, if youre planning on running a 3.08 or steeper gear youll need a 3-series carrier. The 3-series Auburns have the yellow springs. YOu can put a steeper gear on a 2-series carrier but the gears are weaker.

 

What cars did the Auburn 3-series carriers come in?
Thanks,
Will

 

I think all with a LSD, the torsen was an option

 

thank i didnt know what its was....i was thinking locker since the wheel are lock.....but i was told its the best for stok unit

for the well sticking out from the top its an half inch


Seb

 

To clear up some stuff.

A torsen unit is better than an auburn. The auburn cone style was stock, and the torsen was the SLP option that came on SS, WS6, and the such. (the pictured posi looks like an auburn)

98-02 rear ends are not shorter than 93-97. They are all the same, and are couple inches longers than third generation axles. All 93-97 axles came with the same breaks regardless of engine, and same with 98-02. 98-02 has a bigger brake rotor, and has a two piston caliper unlike 93-97 which only has one.

v6 cars did not have limited slip axles, only v8's came with them stock. If you want to verify if the car has a posi, check the RPOs for G80.

3 series posi units DO NOT have yellow paint on them. All posi units received yellow paint on the springs. I have a 2 series in my 94 and it also has yellow paint.

The axles are a direct swap with the exception of brake lines, and a brake prop. unit.

Third gen wheels will fit on a 4th gen axle.

All posi units are not 3 series. Automatics received 2 series if they have 2.73 gears. Some automatics got 3.23 gears.

Here is a zexel torsen unit http://www.bigfastcar.com/images/torsen_3.jpg
Here is a stock auburn unit http://www.iwerearendsonly.com/artic...-posi-trac.jpg

And to answer the main question. All 4th gen axles are the same in strength. Some have better gears, though.

 

thanks for the info, im putting a 12 bolt mosier rear end in my car on sunday and it is out of a 4th gen formula firebird so i just wondered before i did it how far it would stick out

 

Will these units fit in third gen rear ends and if so which ones?
Thanks,
Will

 

both will fit in thirdgen rears, early thirdgens have a 26 spline axles and later(89+) have 28 spline axles.

98-02 rears don't have 2 piston calipers. Also some v6 cars got the LSD rear(Y87), most RS's got them.

 

Both will fit third gens as long as it is made for a 10 bolt, and is the correct spline count for your axles. 88-89 was the cut off year for 26 spline axles. If you have those two years (88-89) it is iffy what spline you got, and the only forsure way to tell is to pull the axles to look. 90 on up have 28 spline axles which are stronger, and bigger in diameter.

All 3rd and 4th gen axles/parts from 10 bolts are interchangable as long as you have the right matching parts such as correct series posi/carrier, correct spline count, and correct gears that are made for the carrier/posi.
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My mistake, it was the front caliper that got the 2 pistons. Also, an RS is not a typical baseline v6 (which I was talking about). It had extra options such as the posi, appearances, and others.

 

The auburn is a better lsd unit for straight line acceleration

 

There is a bit of confusion going on here.
The Zexel Torsen posi is what SLP removed from the F-bodys and sold them as $99 Take offs, but I can't remember what they put in instead.

Both the Zexel Torsen and Auburn units are great in straight line acceleration, it's when you corner hard that the Zexel Torsen fails as it is a torque multiplier style lsd. I had the Zexel Torsen and now have an Eaton (would have prefered to have the Zexel Torsen T2R, but the deal I got on this rear was too good to pass up).

 

Are the 26 and the 28 spline axles the same length? If so I could make a pretty good rear end with 28 spline axles, a fourth gen LSD, and a 10 bolt third gen housing, right?
Thanks,
Will

 

Yes, they are the same and that would work. LSD isn't 4th gen specific, you can use any 28 spline 7.5" LSD for a 7.5" rear end. just make sure of the series, 3 series gears with 3 series carrier.

 

Cool, because I have an 83 disc rear with a Gov-Lock that I want to put in my 82 Z28 but I have heard that the Gov-Locks and the Auburns in the early 80s sucked. If I can swap in some later 28 spline axles and a fourth gen LSD it should be fairly strong.
Thanks,
Will