MX-5 OC Forum

Not the kind you're thinking of :)

How can I tell if my 1990 Eunos roadster has a limited slip diff?

Thanks.

 http://www.miata.net/garage/diffguide/index.html

M-m

 Thanks MM, I was rather hoping for a simpler way to find out. Mine's still in the car.

http://www.miata.net/garage/vlsd.html

The shop manual states to test a VLSD you put a torque wrench on the hub (wheel in the air) and turn 90 degrees with 11 ft lbs of torque (car in gear). This should take no less than 4 seconds. If less then you have either an open diff or the VLSD is toast. Another test for a good VLSD is to jack up the rear with both rear wheels in the air. A good VLSD will turn both rear wheels in the same direction when manually turning the drive shaft. The open unit (or toasted VLSD) will turn the wheels in the opposite directions. There is no rebuild kit for the VLSD and the unit is completely sealed so you can't even get inside it short of cutting it

That test doesn't work for a Torsen, though you ought to be able to spot if someone has fitted your car with a 1.8 rear end.