hey guys is there a way i can find out the production date of my car other then the stickers that are supposed to be on the door jamb? i'm going to be ordering a posi pretty soon and it figures i have the year vehicle they changed from 26 to 28 spline axles so i'm guessing if the production is before 6/89 then i will have the 26 splines?

 

If your car is 1989 and you have a BW 9-bolt then its 28 splines. But it will not matter, if its a 9-bolt no aftermarket Limited slip is going to fit.

 

why wouldn't it fit?

 

Right now there is no replacement Limited Slip for a 9-bolt. 10-bolt parts are not interchangeable.between the two. End of story.

 

is the 10 bolt 26 spline axles?

 

The only way to be sure since 89 was a changeover year is to pull a axle shaft and count the splines. GM used whatever was in the inventory until they were used up then switched over to 28 splines.

 

damn what a pain in the *** so if i have a 10 bolt and either 26 or 28 spline i can get a limited slip though right?

 

Yes, for the 28 splines and for the 26??? Possible.

 

alright because i'm pretty sure i do have the 10 bolt, just not sure of how many spline. thanks for your help