MaroonJeep
NAXJA Forum User
- Location
- Northern Virginia
Looking for a bit of guidance.
I recently replaced my transmission mount in an attempt to eliminate a mild vibration that I was experiencing (1) when the engine was cold, (2) was in reverse, (3) and on the break or coasting under idle power.
Good news - the new transmission mount seems to have solved that issue, however, it has uncovered a worse vibration...
The truck now vibrates under initial acceleration from a stop or very slow roll. No issues at normal road speeds (25/35), on the highway, or at a stop. When it occurs, the vibration seems to be at the same frequency as the engine RPM.
Notable/relevant vehicle details:
I plan to take a closer look at u-joints within the next week. Probably remove the front drive shaft then test drive. repeat for rear. But, I don't believe this is the issue.
Because this has only surfaced immediately after replacing the transmission mount, I feel that this is a big hint and can only leave a short list of things to check. What else do you think I should be checking?
Thank you for the help!
I recently replaced my transmission mount in an attempt to eliminate a mild vibration that I was experiencing (1) when the engine was cold, (2) was in reverse, (3) and on the break or coasting under idle power.
Good news - the new transmission mount seems to have solved that issue, however, it has uncovered a worse vibration...
The truck now vibrates under initial acceleration from a stop or very slow roll. No issues at normal road speeds (25/35), on the highway, or at a stop. When it occurs, the vibration seems to be at the same frequency as the engine RPM.
Notable/relevant vehicle details:
- 2000 XJ w/ 140k miles. AW-4 Automatic transmission.
- 2 or 2.5 inch lift
- transfer case drop
- (possibly) original motor mounts. They looked good about a year ago I had the motor out. They still look OK, but the bushings are at a bit of an angle because of the t-case drop
- new transmission mount
- u joints dont SEEM to have any movement in them
- exhaust hangers look good. I cannot detect a leak.
- vibration occurs in both 2HI and 4x4
- Cannot determine source of the vibration, but it feels like the front of the vehicle. I can feel it in the seat, petals, and steering wheel.
I plan to take a closer look at u-joints within the next week. Probably remove the front drive shaft then test drive. repeat for rear. But, I don't believe this is the issue.
Because this has only surfaced immediately after replacing the transmission mount, I feel that this is a big hint and can only leave a short list of things to check. What else do you think I should be checking?
Thank you for the help!