YotaTech Forums - View Single Post - replace rear diff or rear axle... in a bind

amgraham · 11-10-2006, 12:43 PM

I just pulled a whole axle from a 92 Pickup for parts for my 87 4Runner and they seem the same. The way you can tell the ratio if you can't decode the vin is 1) if it is a open differential (most are) lift one of the rear wheels, chock the front wheels so you can put it in neutral, and have a friend spin the tire exactly 2 times. Watch the driveshaft while they spin the tire and take note how many times the driveshaft spins (you may want to mark it). If it turns a little more than 4 times it's a 4.10, about 4.5 is a 4.56, almost 5 is 4.88s. If it has a locker or posi you have to lift both rear tires and you only spin them once.

Good luck!

11-10-2006, 12:43 PM	#4 (permalink)
amgraham Registered User Join Date: Oct 2006 Location: Midlothian, VA Posts: 701	I just pulled a whole axle from a 92 Pickup for parts for my 87 4Runner and they seem the same. The way you can tell the ratio if you can't decode the vin is 1) if it is a open differential (most are) lift one of the rear wheels, chock the front wheels so you can put it in neutral, and have a friend spin the tire exactly 2 times. Watch the driveshaft while they spin the tire and take note how many times the driveshaft spins (you may want to mark it). If it turns a little more than 4 times it's a 4.10, about 4.5 is a 4.56, almost 5 is 4.88s. If it has a locker or posi you have to lift both rear tires and you only spin them once. Good luck! __________________ 1987 Toyota 4Runner Specs Here: 4Runner Page Member VAXC, RVA-OR