Do 88 convertibles have a lsd, I'm pretty sure it does, even with my 70% worn stock clutch, I drop it at 4k and both tires roast. I don't think a stock s4 with the vert 3.9 has even tourqe to spin both tires with and open differential. Let me know if they come with one.

 

According to my model trims sheets from Mazda, the vert came with a Normal differential.

 

My 88 vert spins both too. all of the time.

 

All North American (N/A) verts came stock with open differentials. The '88 vert was a 3.90 and '89 up were 4.10

 

Spinning both tires doesn't mean anything.

 

thanks. Any of you go do huge 60ft diameter donuts, that ***** fun as hell in an rx7, handles just so perfect.

 

Just because you can spin both tires doesn't mean you have a LSD. You can do very long burnouts with both tires with an open diff. I can show you a pic if you like of a friend with a BMW 328 that left over 100 feet of black marks with both tires spinning with an open diff. If you're going straight it's not much of a problem.

- Coop

P.S. I'm serious about the pic. Let me know if you'd like to see it.