LSD change, rebuild and other questions

[genesis195]

I did a search and found alot of LSD related threads, but most of them only talk about which LSD would be best to get and other "purchase" related questions and answers.

I will be honest, I am a complete noob at LSD's in fact in many other aspects of a car too

Some info: I drive a 1988 mk3 supra with a 7mgte engine.
why I'm asking this: a friend of mine tried drifting my car, but couldn't quite make it happen. He says my LSD is bad or something along that line, he didn't specify hence I'm asking here. (to defend him, he knows how to drift, he's one of those seasonal drifters that gets invitational for events and what not.)

I want to ask a few questions on LSD's
1. What's my stock LSD type?
2. Do we need to change it, or rebuild it? what if you do, but i don't do it ?
3. What's a good LSD then for drifting? Tracking?
4. Any cheap ways to change our LSD to a better one? or is ours already amazing?
5. Let's say I get an Amazingly good LSD and under the product description its' for the 7mgte engine, could I still use it for a 1jz? or a 2jz?

Thank you for helping me. Much appreciated. I really want to learn. Thanks!

 

[spencyg]

The stock LSD isn't set up right from the factory. Follow the link and get the appropriate upgrade spring and shims for your application and all will be right in the world. I believe the factory setup is just a friction plate against the spider gears. Toyota didn't provide enough pre-load to really do much "limiting", but Weir fixes this. This is the cheapest upgrade option before you start talking Cusco or something...

http://www.weirperformance.com/maxgriplsdkits.html

 

[Poodles]

Their kit is more a rebuild with an included stronger spring. Things to keep in mind:
- MKIII Supra was a top of the line car, a noisy and clunky diff wouldn't fly (in fact they had TSB's on that issue how to fix it)
- Most people don't change their fluids like they should (this is made worse by leaks and that the diff doesn't hold much fluid to begin with)
- Most cars have never had the LSD rebuild and most cars are well over 100K miles
- Too much limited slip additive will cause them to slip worse
- It's a limited slip, it's not a spool and it's loose enough to let you turn. Most drift setups are closer to spools than anything else.

A race setup isn't going to be nice on the street. Up to you on what you want the car to really be used for.

 

[Enraged]

for $45 would it be worth it? no idea if my diff has ever been rebuilt...

 

[Poodles]

Not gonna get away with only $45 to rebuild your diff. Setup isn't cheap usually, and you'll at least need a new crush sleeve (or a spacer and shims that won't wear out and leave the pinion bearings with zero preload leading to failure). Not to mention new nut, seals, and new bearings if needed.

Best writeup anywhere: http://www.supraforums.com/forum/sh...o-A-few-tricks-to-beef-up-the-rearend-carrier

 

[super.secret.supra.club]

Rear up on the tsrm and listen for the word backlash.

 

[spencyg]

Weir sells the full rebuild kit for somewhere just north of $200. I figured that a complete rebuild with both an upgraded clutch spring and their crush sleeve eliminator would run me around $300. I've set up a few diffs before so that aspect of it isn't scary, but it is certainly something that requires care and patience...really no different than building an engine.

SG in NE.

 

[joel903]

If you plan on doing the work yourself then you must have a press at the very least.

 

[Northbaysupra]

Hey guys anything you recamend for getting that horrible play out of the diff durring my Stock shim rebuild ?