Exhaust rattle on the cross member

[Rymanrph]

My exhaust keeps rattling against the transmission cross member. Every couple weeks I crawl under there and use a pry bar to separate the two, but it always sags back. Any tips?

[JeepcoMJ]

replace your transmission mount.

 

I've found that if it's rattling, generally the trans mount is on it's last legs and has deteriorated to a point that it's lost around 1/2" of height.

[bgred2]

Had the same problem with my old beater comanche. Pried the transmission up with a tire iron and put a hockey puck under it. Still goin strong 3 years later.

[Eagle]

replace your transmission mount.

 

I've found that if it's rattling, generally the trans mount is on it's last legs and has deteriorated to a point that it's lost around 1/2" of height.

^^^ This. Tranny mounts can be expensive, though. Inspect visually. If you don't see chunks of rubber missing, it might be worthwhile just shimming with a washer or two on each of the bolts to create enough clearance to stop the rattling.

[carnuck]

Missing exhaust hangers will do it too.

[cruiser54]

Motor mounts AND tranny mounts can contribute to this. Inspect them both. Not expensive. See www.rockauto.com.

[Rymanrph]

I replaced one of the motor mounts when I did the swap; the other was perfectly fine. I've had the transmission mount in and out a couple times and don't remember it looking worn, but its worth looking into.

[jeepcoma]

Tranny mounts can be expensive

 

ANCHOR 2625 Transmission Mount

Regular Inventory $10.31

Rockauto

[fiatslug87]

Also check the exhaust hanger bushing at the crossmember, mine was in bad shape.

http://comancheclub.com/forums/viewtopic.php?f=2&t=33148