Does any one know how to identify a 180sx diff , or tell if my diff is a j30 diff.
It is a vsld but I can figure which one. I havent driven in years so the gear ratio wont help me.

 

PM me

 

anyone?

 

You can use the gear ratio to figure it out.

Set it somewhere where you can get a good look at both the input and output shafts. Mark the very top position on one output shaft and the input shaft. Spin the input shaft exactly 4 times, arriving back at the top position. If the output shaft has stopped short of a full rotation, it's a 180sx diff with a 4.083. If it has gone past one full rotation, it's a J30 with a 3.90.

 

Lol I forgot all about that. We do that on trucks all the times because toyota straight axles come with different gearing. thanks.

 

Did u figure it out yet?

 

Been too sick to do it. but know how.