Mud in my Veins
Join Date: Dec 2000
Location: Memphis, TN
Thanked 0 Times in 0 Posts
Ford usually put gears with a ratio .01 higher in the front diff than the back. This is so that the front wheels pull you around curves in 4WD. But if the ratios are different for ANY reason, you can't run 4WD on a high-traction surface because it will overstress the transfer case. If your ratios are ever REALLY different (like more than .05), you shouldn't engage 4-wheel on any surface.
You should be aware that setting up the ring & pinion is a VERY precise procedure and if you're not prepared to do it EXACTLY right, you should pay someone who is experienced to do it. It's expensive, but if it's done wrong, the diff can lock up or explode. (Words of experience.)
83 Custom w/95 4.9L EFI, 78 NP435, 83 NP208, 83 D44IFS 3.07, 87 Ford 8.8ABS 3.08, Michelin LTX AT 31x10.50R15