You didnt explain why it wont fit...Is it too long or too short or what? I installed a RC 4 inch on my 87 and didnt have any problem on either shaft. The front needed to be extended about an inch from stock, but the splines on the slip yoke are plenty long enough for this.
It cant be too long, all you are doing with it is raising the frame in relation to the axle, which makes the space between the front axle yolk, and the Tcase front output shaft yolk, LONGER. so if ANYTHING, your front driveshaft would need to be longer......
take it to a driveline place and have the cut and balance it for you. They can lengthen or do whatever you need. It costs about $125 on average. It should ride in the middle of that spline. Your are risking serious damage if you dont have it the correct length. I am sure if you search these forums you will find someone asking what to do after they broke something because of this. Any difference more than 1/2" I have the driveshafts resized.
I'M FLEXY AND I KNOW IT
95 YJ, 2.5 AX15 conversion, 4.0 TB, SOA +1.5", 33" DC Crusher Tires, 8.8 Rear w/welded tubes + LSD, Spartan Locker HP30 Front w/solid axle swap, Rocky Road OTT kit, Safari Snorkel, Warn VR8000 Winch, Smittybuilt front Bumper, JKS Disconnects, AA SYE, Teraflex Shock Bar in Rear, 1/2" Boomerang Shackles, RE Add a Leafs, Homebrew Traction Bar, Monstalined in&out, LED Tail lights, 1700 Watt Stereo
no issue like that at all, get some pics for us of whats up. Did you do the transfer case drop? I never even took my driveshafts out to install the complete lift kit (4" RC) I did the TC Drop, then I did one spring, one side at a time. Left rear, right rear, left front, right front. Then installed the longer brake lines, pitman arm drop and whalla... rockin!
make sure your axle is in the correct spot on the leaf and not to far forward or backword or something.
Also be sure that you set the jeep down on all leaf springs BEFORE the bolts are tightened.
Needs pics of this. It's impossible that a stock front driveshaft that fit before the 2-4" lift doesn't fit now after the lift unless you did something to change the wheelbase. I can get you a brand new driveshaft if you need one for close to the same price as having yours modified, but I don't think that's the problem.
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look at this picture, this shows my shackles pulled to their limit with the bolts loose just to get the springs in. Then, once set on the ground everything leveled out like it should and the axle moved a couple inches forward. Then on the ground we tightened the bolts up. On a hoist, if your shackles are pulled back like this, and tightened down that may be the cause???
in this pic you can see on the ground how the shackles are straight down with weight on it.
talked to a friend who agrees and says yes, stock shafts are good up to a 6" lift.
...and my wife says "tell him somethings got to be out of place" lol. Her and I looked under mine to try and figure out what could be off. Make sure your axles are centered in the right spot of the leafs, make sure you leave the bolts loose until weight is on it... geeze other than that we got to see it.
What city/state are you in? Maybe someone could stop by and take a peak w/you...