Ok, I am doing a homebrew lift expecting to have 3-3.5" of lift, I presumably have the worst set up, a '98 4.0 auto with np242 and 8.25. What I could not find in the thread was if I use an front DS from a manual xj and a HnT SYE would this solve the length problem.
I just recently bought a 99 xj with a 5.5in rubicon express lift, 4.0l,and auto trans and I am going to install a SYE and I didn't know if I had to shim the axle. If so does any body know how much, and where to get the shims from?
You definitely need to shim the axle. You need the axle output inline with driveshaft. I used 4 degree shims at 4.5". youll need at least that. Get quality shims with a flat section machined in for the center pin to sit flat. I found some on amazon. http://www.amazon.com/Warrior-Produc...=4+degree+shim
no problem just did this myself. still trying to track vibes though. get yourself some new bolts for the center pin too. I used some allen head bolts so theres somthing to grab and torque it down with.
Looks like a simpler way out - no disassembling and fiddling with the transfer case, no drilling yokes and modifying front driveshafts... just measure, order, install.
Can anyone tell me why this design won't work? The only possible disadvantage I can see is that the driveshaft is going to be a little shorter than a true SYE system driveshaft, but since I'm running a five-speed, I've already got a longer driveshaft to start with (so I'm guessing my "slip yoke double cardigan driveshaft" will be about the same as most SYE shafts with an automatic.
It'll eliminate vibration thanks to the double cardan joint, but the yoke can still slip out of the t-case completely if the rear axle droops enough. Also, if you break a u-joint and have to pull the shaft (with the intention of using FWD for a while to get back to civilization,) ATF fluid will leak out of the case as opposed to a fixed-yoke SYE system where the output shaft stays in place and keeps it a sealed unit.
The yoke shouldn't be a worry if you don't drive on trails that feature a lot of articulation, but it doesn't take much to toss a u-joint (and/or bend the ears on the yoke in the process.)