In my experience, if you have bad motor mounts the trans mount is bad also. What may or may not happen if you don't replace the trans mount is that the front new mounts can raise up the motor and with the rear mount bad still, the angle of the power train is off and may cause the fan to rub the shroud. If it it doesn't then don't worry about it.I didnt have any problems the way I did it. I would replace both front mounts, theres no need really to do the rear transmission mount
Did you read thru this thread? Lots of good suggestions in here including things that address your questions. Also, the internet gods get angry when you post the same question in multiple threads ; DHey All,
I am in the middle of the motor mount job on a 2005 TB 4.2L 4x4. The 4x4 gizmos seriously restrict the drivers side motor mount. I have the passengers side in, and I am wondering if now that it is 3/4" higher on the passengers side with the new mount, if that is not what is stopping the drivers side from lifting high enough. I am also wondering if I should put the old one back in temporarily to lower that side and lift the drivers side?
Another thought is loosening/removing the engine motor mount bracket (The top one with 4 bolts to give myself the small extra clearance needed?
Thanks,
Tom