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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Oct 2009 Posts: 127 'Bolter | | 'Bolter Joined: Oct 2009 Posts: 127 | Hifolks
Anybody rebuilt a rear transmission mount lately? The rubber in mine was all rotten. So I cut it apart, to bolt in new rubber as per old threads, expecting simple rivets. Instead the rivets themselves and the holes in the upper bracket and lower retaining plate were 3/16, but the rivets went through larger bushings (1/2"?) and the holes in the main plate are even larger, and not round. It must have been all vulcanized together.
So will it work just bolting in the two flat rubber pads with 3/16" bolts? Anyone use bushings or rubber washers on the inside? It seems without something there it will be hard to center and a lot of wiggle room side to side.
Last edited by wurlitzer46; 01/20/2014 10:29 PM.
52 3100 project
54 3100 / 3112 ice cream truck, next project
| | | | | Joined: Mar 2011 Posts: 153 'Bolter | | 'Bolter Joined: Mar 2011 Posts: 153 | I've put a couple of these mounts together over the years with a combination of rubber pads and just enough black silicone caulking to keep everything where I want it to stay. It probably wouldn't win many show points for originality but the mounts are still hanging in there years later.
1946 Chevy pickup, 1948 Chevy suburban, 1950 Chevy pickup, 1952 GMC pickup, 1957 Chevy pickup, 1939 Chevy pickup
| | | | | Joined: Jun 2010 Posts: 1,001 Shop Shark | | Shop Shark Joined: Jun 2010 Posts: 1,001 | I simply bolted mine (with new rubber pads) together using 5/16" bolts (3/16" seems too small) and nyloc nuts. Once the mount was installed and self centered, I snugged up the bolt/nut to keep the rubber in place, but not so tight as to severely deform the rubber. | | | | | Joined: Jun 2012 Posts: 1,747 'Bolter | | 'Bolter Joined: Jun 2012 Posts: 1,747 | This will qualify as officially Cheap. I went to the truck shop and bought 1 big mud flap. 10 dollars. I then cut it up for the radiator support, cab mounts and the rear trans mount on a 52 1/2 ton. Then took it to my friends house and did the same for his 57 1/2 ton. Still have some left for other projects. All I needed was a set of HF hole punches to finish the tasks. 2 years and no issues. Oh yeah, got the bed mounts out of that thing to.  Happy cheap guy.
Steve H
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