Hi i am new here and i need some advice. I have a 2004 TJ with a 6" suspension lift and 3" body lift. I bought it used like this, i personally have done nothing to the vehicle. I blew out my rear u-joint which broke my drive shaft and my transfer case. The u-joint had been going bad since i bought it and i drove it about 5k miles before it finally failed, so i it is completely my fault, i just didnt realize what the problem was.
Anyway not trying to drag out this story but i just got a used transfer case and drive shaft to replace what had been broken. Turns out the previous owner had a custom transfer case and drive shaft and the mechanic that i had repair my Jeep could not find these specific parts, so he put in a stock transfer case and drive shaft.
Now i am scared to drive the thing cus i still have drive shaft vibes, but not nearly as bad as before. It really only occurs less than 25 mph, whereas my old drive shaft vibrated even as high as 55 mph, but i cant afford to destroy another drive shaft and transfer case. The old drive shaft had a double u-joint on the transfer case side of the drive shaft but this one does not. I am a bit confused cus the u-joints were causing my old drive shaft to vibrate, but i should have new u-joints now so i don't know what is causing the vibrations now. Do you think i just need to get the drive shaft balanced?