adge the champ
New member
have a 93 jeep yj with a 4inch lift and 33s. the engine is a 4.0 with ax15 trans. i recently replaced the old tcase with another tcase cause the stock tcase was no good. it has a tcase drop and made little to no vibrations before until i decided to put it in some offroading mudding in 4wd. i was on my way to clean the yj off when the driveline vibs became worse starting at 30mph-up. i cant really feel it in the shifter, but it shakes the dash and whole jeep badly. i cleaned all mud off the wheels and shafts but still vibrated bad so i ruled that out. the vibs sound like a rumble like grinding sound. i assume cause of driving it offrd. the rear shaft was thrown out a line worse and ujoints are about to fail again although i replace them last fall. can this be right? driving offroad can make driveline angles worse which making the vibs worse or can it be something else. i doubt its the tcase, this started happening when i engaged 4wd and put it in offroad. i dont have a sye either just a tcase drop. i knw this is a dumb question but will any loose bolts cause vibs too?