I doubt the vibrations will hurt anything unless you feel a real hammering effect....like it's hammering against the t-case, but I doubt that. I don't know what the MML will do for you. I think I got my CV/SYE set up for about $230 for the aprts. If it's drivetrain a CV set up should fix it. I'm still surprised 3" is causing that much problem.

97tj, Shaved Ford 9 rear, 4:10's, New 35x12.5 BFG KM2's to test!, Warn x8000i, ARB's, Quick Disco's, Hand Throttle, & it's my DD. smile