GBR 3.90 ring and pinion kits - new

DaveC

Well-known member
Jan 15, 2006
337
0
MA
I have front and rear GBR 3.90 gear kits that are not going to be used. These are similar to the GBR 4.11, but offer a 9% gearing reduction versus 12%. The fronts are reverse cut for strength plus these should be a little stronger than the 4.11. The rear pinion gear works with both the 4-bolt and 3-bolt flanges. The 3.90 ratio brings back stock gearing with full 32" tires.

The kits are new in the box from GBR last year. All set up parts included (seals, shims, nuts).

Paid $750 shipped from GBR, asking $625 shipped within USA lower 48 states.

Also, I may have some flanges, spacers, bearings, diff. housings, etc....if needed.

Thanks
 

DaveC

Well-known member
Jan 15, 2006
337
0
MA
$575 shipped (USA, not Alaska or Hawaii)

These kits include everything needed to rebuild your differentials. New bearings not included, but I can provide some good pinion bearings for a small fee. I also have two clean diff. housings, pinion flanges and spacers.

The 3.90s are ideal with stock to 32" tires, but will improve torque with even larger tires as well. Besides the gearing, mechanical advantage, the engine is further up the rev range which adds to the power.

****sold****
 
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