Factory 4.30's?
 

I installed my Aussie Locker and an add-a-leaf this weekend so I went ahead and counted my ring and pinion teeth to figure out my ratio. I counted 43 on the ring and 10 on the pinion, which is 4.30:1 right? Was that a factory option on an 88 4cyl Auto?

sound right.

4.30's came in most auto's during that time.

ah, thats cool. I probably should have searched that and found that out. I will try and limit the stupid questions in the future