All other J Series sticks set the standard in truck gear boxes, which is why you could find them on the bill of materials for other makes of the time.

Both the GM TH400 and Chrysler's TF727 came behind the absolute meanest brute-torque Big Blocks of the 60s, which just begs for a Buick 455 or Dodge 440 Six Pak transplant into a J Series!

Also, both the TH400 and the TF727 have great parts support and can be made to be nearly indestructible not to mention tailored to your application perfectly.

Not sure which tranny you have?

J Series trucks used some of the best and most readily available transfer cases out there.

From the beefy widely-used standard of all-gear cases, the Dana 20 to the often misunderstood Borg Warner Quadra-Trac, J Series transfer cases were up to the task.

If the Dana 20 is the standard of all-gear cases, then the NP 205 is the mother of them all.

The absolute #1 swap choice for the hardcore crowd, in many guy's view everything else will break before the NP 205.

Why Jeep never used them is hard to say but I have some thoughts on