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post #1 of (permalink) Old 10-14-2002, 02:52 AM
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What\'s that bolt for?

I have a loose bolt, and I'm not sure why is it there for & should it be loose or tight...
There's a (stock) protection plate under the T/C. On the back part of that plate there's only one bolt that's visible without removing anything. If I saw right, that bolt is holding something connected to the exhaust pipe, but I'm not sure. It's somewhat large, and has a sort of rubber bushing on it, on the upper side of the protection plate. I tried to tighten it, but it won't go nay further. Since it's loose it makes an annoying rattling noise almost all of the time. Anyone knows what's that bolt for and how tight should it be?
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post #2 of (permalink) Old 10-14-2002, 04:21 AM
 
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Re: What\'s that bolt for?

The plate is for more than protection, it's actually part of the frame (crossmember) and holds the transmission and driveline in place. The bolt you see is part of the transmission mount that holds the transmission to the crossmember. Parts of the mount are rubber, which wear out. The reason the bolt appears loose on your jeep is the rubber portion has deteriorated.

To fix it you just need to replace the rubber parts. There are actually two pieces, transmission mount and torque arm mount. The torque arm mount is most likely the bolt you can't tighten. Someone else may know of a good diagram, but maybe showing you the pieces can help: web page
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post #3 of (permalink) Old 10-14-2002, 06:02 PM
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Re: What\'s that bolt for?

Here is a pic of the trans torque mount in my CJ. It's an auto, but the stick Jeeps use the same torque bushing setup.

The red poly bushing to the left of the trans is the top torque bushing. The lower one is directly below the silver "U" channel that it is bolted through.
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post #4 of (permalink) Old 10-14-2002, 11:40 PM
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Re: What\'s that bolt for?

Excellent! Great explaining, great picture!

Thanx! [img]images/graemlins/grin.gif[/img]

One more Q here... How much torque should I use with it? It should be tight, right? I mean, it sound like some kind of heavier tranny-wear & noise if it's loose, not?



post #5 of (permalink) Old 10-15-2002, 05:21 PM
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Re: What\'s that bolt for?

The bolt, where it goes through the skid plate, should be tight, but the bushings "float" around the "U" channel pictured. They are there to limit excessive torque wrap, not to bolt the mount tight. That is the transmission mounts job. Hope this helped
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