I'm thinking about swapping my tranny for one with a VLSD from another Nissan. I was searching the net and stumbled upon this:
http://list.miata.net/miata/1997-08/2406.html
I'm wondering how valid this is. If so, I'll just keep my tranny and look into getting the Quaife.

 

Yes, VLSDs wear out. No, the Quaife doesn't.

 

Mine seems to work pretty good. Just don't push it, they get warm and go away if you don't cool off a bit between runs. But you should let everything cool down a bit anyway regardless. Its pretty easy to tell when it happens. Check my pic though, it is definately working there.

Jim

 

http://www.howstuffworks.com/differential.htm is also a great article on the different designs of LSD.

 

the VLSD isnt as good as the Quaife. i think the Nissan one is only a 70/30 split whil ethe Quaife is a 50/50 split. Ive also heard that when it heats up it gets sucky. That article talks about Miata ones tho. i HIGHLY doubt that all VLSD's go out around 20k or so.

 

that's good to hear, I think I'm go ahead and swap for a tranny with a vlsd. I think I'm going to need new axles while I'm at it.