2000 S10 Rear End LSD's

[RebelGT]

I'm looking around for an LSD for my rear end, specifically I'd prefer to get a 2 way, but I'd be open to others if there aren't any around. So basiciy I'm trying to find out where and what my LSD options are.

[geoffinbc]

EVERYONE makes an LSD for a 7 5/8" rear end man.

I myself have a TORSEN out of a Camaro. Cost me $200 and 2 bearings to install. It will last forever and take shit loads of horsepower.

http://www.randysringandpinion.com <Good Site to browse through read teh tech articles

[RacerX11]

I would not recommend a Torsen from a late-model F-body. They will not last forever, and are quite weak. I wore mine out after only 20K miles, and it acted like an open diff after that. I have since upgraded to the Torsen T2R, and love it.

There are 3 basic types of the Torsen available for GM rears, the OEM T2, the HD T2, and the T2R. The OEM T2 was a high-volume, cost-reduced version GM started putting into the LS1 cars starting in 1998. This version had lighter duty parts than the standard T2. The HD T2, sold by SLP and others, is really just a standard Torsen T2 design, but it often referred to as the HD version as it has stronger components as compared to the OEM T2. It has the same bias ratio as the OEM T2, and no preload. This lack of preload is an important point, as the Torsen is a torque-biasing differential. If one wheel comes off the ground, and can apply no torque, the differential will act like it is open. You must be applying torque with both wheels to get the limited slip effect. The T2R is the aftermarket racing version with a higher bias ratio than the OEM and HD T2's, as well as the preload, which reduces the open-diff effect when a wheel is lifted.

The T2R is the reccomneded diff if you plan to autocross or road race the truck. For drag racing, a clutch-type diff might suit you better.

Marty

[RebelGT]

the s10 rear end is not in a truck, its in my lil project car, but anywho, I'm looking for a good LSD that will have good lockup, but allow for turn in. So the T2R is aftermarket only? How can I tell the differance between the diff's by looking at them?

[geoffinbc]

I dont't know about weak. They did stand up to 320HP from a Camaro quite well. I have had mine in for more that 20,000K and I use it quite hard. No complaints from me. I am not sure if mine is the OEM one or the regular T2.

I can agree on the preload. Mine has none and if I take a right hand corner hard and unload the tire I can make the inside one spin. However proper control of the gas will let it grab and away I go.

[RebelGT]

"Featuring high tension chrome molybdenium steel housing and gears the Cusco LSD is up for the task of serious competition. With large oil windows for increased flow and Cusco's original groove cut technology for improved efficiency on the clutch plates, stability and longevity is promoted. ----- The 2-way Type RS utilizes coil springs located between the pressure rings to develop initial torque and features full engagement during acceleration and deceleration. The use of coil springs rather than cone plates help promote faster, smoother engagement, along with higher durability."

My buddy has one of these in his S13, and I really liked the engaugement, as soon as you jumped on it would snap right into locking diff. So thats kind of the characteristics i'm looking for I guess. Its like a locker with a clutch pack.

[RacerX11]

I dont't know about weak. They did stand up to 320HP from a Camaro quite well. I have had mine in for more that 20,000K and I use it quite hard. No complaints from me. I am not sure if mine is the OEM one or the regular T2.

I can agree on the preload. Mine has none and if I take a right hand corner hard and unload the tire I can make the inside one spin. However proper control of the gas will let it grab and away I go.

Mine didn't stand up to a stock LS1 for shit, and if you surf the F-body boards, there are countless tails of broken stock Torsens. They just can't handle any power for long. If they don't physically break, they wear out to the point where there is no gear friction, and act like an open diff. There is a reason SLP removed all of the OEM Torsens from the cars they modded, and sold them as take-offs for $99 apiece. The only way the standard/HD T2 is better is that the case/gears are slightly stronger, but it will still wear out and open up.

Marty

[RacerX11]

Rebel,
The T2R is aftermarket only. I don't have any pcitures, but the T2R has a heavy solid black preload/axle retention block, whereas the OEM T2 has a much smaller, less robust block. Just a note, most of the diffs available are set up for 28-spline axles. I know early S-10's had a different spline count, not sure what 2000 would be.

I don't believe Cusco makes a diff for this application, which is too bad. The big advantages of the Cusco are the variable clutch packs to customize the preload to your specific application, as well as the machnism that applies more clutch pressure as more torque is applied to the diff. This makes the clutch-type diff mimic a torque-biasing gear diff.

Mine drives very similar to how you describe the Cusco diff, with a very open feel during braking or while neutral cornering, but the diff locks up as soon as you apply torque. It does not lock up soild, but still allows a differential action. This diff transformed my car for autocrossing and aggressive street driving, making it very predictable, and easy to hold the rear tires on the edge of adhesion (and beyond, if so desired). If you plan to drive this thing around corners, I highly recommend it. A lower cost option might be an Eaton or Auburn clutch-style posi. I have no experience with these, however.

Marty

[geoffinbc]

Yes 2000 uses 28 Spline.

[RebelGT]

I don't want to get something new, so i'll probally looking for a used auburn or eaton then if thats the case. They're both rebuildable right?

[RacerX11]

Yes, but from people I have talked to whom have rebuilt them, the parts cost can sometimes add up to the price of a new diff.

Marty

[RebelGT]

ahhh poop, i wonder if i should just get a detroit style locker....

[Doubt_Incarnate]

i dunno, my ls1 seems to work like the day i bought it. i thought the ls1s had an eaton lsd (advertised as an lsd on my window sticker), but really all i wanted was the 6 speed and the v8 so the rear end wasnt top on my list of "wow". my car has about 75K mi. i havent noticed anything odd in a straight line, except when i put these stupid cheap tires on. and when powering through turns i've never spun and inside tire, usually just lose the back of the car slightly (stupid kelly chargers).

[Cliff8928]

I can agree on the preload. Mine has none and if I take a right hand corner hard and unload the tire I can make the inside one spin. However proper control of the gas will let it grab and away I go.

Usually the trick there is to hit the brakes a little to create some resistance on the lifted wheel...

My buddy has one of these in his S13, and I really liked the engaugement, as soon as you jumped on it would snap right into locking diff. So thats kind of the characteristics i'm looking for I guess. Its like a locker with a clutch pack.

Sounds similar to my mom's "G80" Eaton locker she has in her '96 GMC. You get a little hint wheelspin, then the little coutnerweights and stuff work inside, press against some clutches and it locks. but that's an 8.5"..



Cliff Scott
89 BerettaGT
04 AleroGX

[geoffinbc]

Yes applying the brakes a bit does help. But the brake bias on an S-10 is like 90% front so you end up slowing down LOL.

The G80 is avalible for the 7 5/8" rear end. It works quite well for on raod use. However people do manage to blow them to pieces taking them offroad.