Originally Posted by jeep93GCL
Hey has anybody change their motor mounts on their jeeps is hard and how many mounts is it. When I drive the vibrations goes away when I stop at a red light or stop if vibrates but once I drive away it goes away I was thinking it was the motor mounts has anybody had this problem before....
The I6 4.0 has 2 mounts. The mounts them selves are easy to replace. The only snag is that you need to lift up your motor to do it.
I am currently dealing with the same kind of vibration issue. When I come to a stop, the front end will shake. Sometimes violently, sometimes just lightly. In my case, I narrowed it down to more than one thing wrong. My transmission wouldn't downshift properly (Gears 2 and 1). The converter lockup valve in the transmission valvebody was sticking.
I put in some Automatic Transmission Treatment fluid and that solved the vibration issue about 75%. I'm assuming that it also needs motor and transmission mounts as well. It's 14 years old and gets the hell beat out of it. Not really what the stock mounts were intended for.
Other than that, you could try cleaning your IAC. That's what's next on my list before I spend the money for mounts.