89 Transmission support skid plate. - JeepForum.com
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post #1 of 4 Old 12-13-2017, 07:33 PM Thread Starter
tridaddy
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89 Transmission support skid plate.

Is there a proper install order for the skid plate?

The reason I ask; I wanted to remove the pucks which lowered my skid plate to see how much of an angle was on my rear driveshaft. I need to install a SYE.
When I went to put the 6 pucks back in, it seems the drivetrain has shifted. If the pucks are not there, it looks like the six nubs on the frame align with the six recesses on the skid plate to keep everything in alignment.

Should I loosen up the transmission mounts or even remove them. Raise the transmission and transfer case, install the skid plate, then bolt the transmission mounts back up?

Thanks

Todd

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post #2 of 4 Old 12-13-2017, 09:33 PM
Opihi59
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On the YJ, there are conical bolts which align the dimples in the skid plate to the captured bolts inside the frame rails. These conical bolts have likely been discarded. They do align the skid, and hence the driveline. Some T case drop kits include a conical "washer" but most do not, especially in the individual puck variety. You can find replacement bolts likely from an XJ in a junk yard since YJs in junk yards are very rare. Others have told me that you can purchase conical washers from places online, but I have never been able to find them.
Once your skid is lined up by the conical head bolts, then the driveline aligns properly.
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post #3 of 4 Old 12-14-2017, 06:28 AM
jbolty
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Do you know if there is also a motor mount lift? That and a transfer case drop are a common combination to "fix" the driveline angle.

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post #4 of 4 Old 12-14-2017, 06:45 AM
TSEJEEPERS
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Yes you are going to have to take the nuts off of the transmission mount, or at least loosen them.
When I take a trans cross member/ skid off. I take the transmission mount nuts off, and the stabilizer off.
Jack the Jeep up some using the cross member, put a jack stand under the transmission. Lower it down.
Leave the jack under the cross member to support it, then take the bolts out that is holding it on the frame.
Do the opposite to put it back on.

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