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Crawdad · 04-21-2008, 05:59 PM

Here's what I did:

Jacked up the rear end on one side - one tire up, one tire on pavement. Chalked the tire, chalked the pavement. Chalked diff housing, chalked driveshaft. Rotated tire 2 full revolutions. Driveshaft rotated just over 4.5 times. 4.56 gears?

Did the same for the front - rotated tire 2 times, driveshaft rotated just over 4 times. 4.10 gears?

Here is my question: I would LIKE to keep the 4.56 gears, since they are taller and I plan on lifting and going to 33"s. However, it seems to me like the front third member would be an absolute pain in the butt to replace. Also, I remember reading that the 1990 front diff is different (has ADD?) than others. Will I HAVE to replace it with a 1990 3rd?

Anyone have a 4.56 front third they wanna sell?

Also, since I wheeled it very briefly like this (15 minutes or so), and rolled it back and forth on the street a while, what are the odds I blew my transfer case up? Heh.

04-21-2008, 05:59 PM	#17 (permalink)
Crawdad Registered User Join Date: Jan 2008 Location: Birmingham, AL Posts: 276	Here's what I did: Jacked up the rear end on one side - one tire up, one tire on pavement. Chalked the tire, chalked the pavement. Chalked diff housing, chalked driveshaft. Rotated tire 2 full revolutions. Driveshaft rotated just over 4.5 times. 4.56 gears? Did the same for the front - rotated tire 2 times, driveshaft rotated just over 4 times. 4.10 gears? Here is my question: I would LIKE to keep the 4.56 gears, since they are taller and I plan on lifting and going to 33"s. However, it seems to me like the front third member would be an absolute pain in the butt to replace. Also, I remember reading that the 1990 front diff is different (has ADD?) than others. Will I HAVE to replace it with a 1990 3rd? Anyone have a 4.56 front third they wanna sell? Also, since I wheeled it very briefly like this (15 minutes or so), and rolled it back and forth on the street a while, what are the odds I blew my transfer case up? Heh. Last edited by Crawdad; 04-21-2008 at 06:00 PM.