This modification was used for two different reasons. The first reason is to allow for my TJ to be able to have a body lift. TJs with air conditioning don't have long enough A/C rigid steel hoses to allow for a body lift. This motor mount lift raises the motor equal with a one-inch body lift, so no modification is necessary. This also means that no radiator drop brackets are needed, no transfer case linkage, or water pump bracket modification. By raising the motor, the driveline angle is reduced enough to eliminate all vibration caused by the suspension lift, even with the transfer case drop in place.
Total time required for the motor mount lift is about 2 hours. Of course mine spanned three days, as usual. First, I had to cut the motor mount through bolt on the drivers side because of the A/C compressor being in the way. That bolt is $5 from Mopar by the way. When reinstalling, it easily goes in on the other side. After that fiasco was over, we had to make our own "safe" instructions to do this. The instructions say to raise the motor with a jack and a piece of wood, putting pressure on the oil pan. We tried this with a hydraulic roller jack, which isn't very smart, not to mention unsafe for the oil pan. later we used a cinder block with a bottle jack on it, jacking a 2x4 on the squared off pads on the front end corners of the motor. When everything goes well, this shouldn't take more than one hour.
Procedure:
I just got a TSB letter in the mail today about the ODB light in my Jeep Wrangler.