JK Front and Rear Drive Shafts
There are many different ways to build a drive shaft for the new JK. One method uses an adapter flange which bolts directly to the original pinion flange. This is really not much more than a round flat plate with bolt holes drilled into it and a conventional drive shaft weld yoke welded into the center. This then bolts to the stock pinion flanges. We just don't think this is as “clean” of a modification as can be done. What if the weld yoke portion breaks? You could have a tough time finding a new one or repairing the old one. There is also a concern with maintaining the accuracy of the part after welding. In addition to this, the center of the universal joint gets pretty far away from the pinion bearing. Excessive overhung load is not a good thing.
In picture to the right, this shows the stock flange and adapter that our competitors use on the left. Our version is shown on the right.
With our version, we’ve elected to make a replacement flange for the
differential pinions. These flanges are machined from solid billet
steel. We do not believe this flange will
ever break. We designed this to accept standard "off the
shelf" mating flanges. If these flanges ever break, you at least
stand a chance of getting a replacement part from almost any drive
line shop. This also nets a longer drive shaft with the center of
the universal joint closer to the pinion bearing.
If you have a lift in the vehicle, you may need something to pitch the differential for the CV type drive shaft. This is typically done with adjustable control arms.
Installation is a simple bolt in. You should have
available for possible use; an impact wrench capable of delivering
180 LB/FT torque. Box end wrenches of the following sizes 1/2”,
7/16” & 18MM along with a 1-1/4” socket.