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Discussion Starter #1
put a 4 inch lift with a 3/4 inch spacer.

under heavy acceleration or if you go over some railroad tracks it seems to be binding.

so my question is how much lift can you run a on stock front d shaft. put a je reel rear shaft in and that works fine.

4 door jk manual.
 

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Not sure if this is the answer to your question, but plenty of people are running stock shafts with 4" of lift. Although there does seem to be a tendency for the inboard boot to go, and/or the shaft boot catch on the auto trans pans.

I've ran JE Reel shafts with various setups, 4" springs, 4" springs + 3/4" spacer, 4" springs with 1-3/4" spacer, and 4-1/2" springs. Never had any binding issues, although with the 4" + 1-3/4" setup it was real close to binding up at the t-case double cardan.

FWIW With what was effectively close to 6" of lift, it was nigh on impossible to get both the caster and pinion angle good enough, rotating the knuckles would have been needed, and the driveshaft angle at the t-case would need to be addressed also.

How are telling it's binding? If you lift the front wheels off the ground you will be able to rotate the driveshaft by hand and should be able to feel if it is binding. By raising the frame at the same time (or removing the wheels and lowering the axle) you will see how close you are to binding the shaft.
 
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