i have a 1986 Z28 with an LG4 and 5spd. I laid down on it on a gravel road and both wheels threw gravel/dirt and so i'm wondering if i have posi?

i tried to find the stamped number on the rear axle, but cannot find anything. i can't even find the slot to check the fluid and i used ramps and a flashlight.

someone help a brother out...

Greg

 

There should be a RPO sticker in the car somewhere. It might be on the bottom of the console lid or on the back side of the spare tire cover. Look for the G80 code. This is the limited slip differential (posi) option.