A year ago when I pulled my engine for repair, I found the rear tranny/driveshaft mount smooshed out. I had recast it using Simple Resin Enduro Soft 2-part polyurethane. So I had some leftover Simple Resin Enduro Flex material, a harder polyurethane product and recast it back in October '24 and stored it away to await reinstalling the engine/tranny. When I got it out of storage, I found it had smooshed out without any load on it (pics 1 and 2). So I contacted Simple Resin to ask about it and the responded that either material had a shelf life of only 6 months. I had used the Enduro Flex that I bought back in 2021 to cast the rear axle pivot mounts (they're doing fine BTW. thumbs_up) So the leftover stuff didn't cure properly. I got a fresh batch and recast the tranny mount again and it looks good this time after a couple tries (pics 3 and 4). I'll have to find something to do with the leftovers before it goes bad. Maybe some fishing lures. grin
Or if anyone is dying to try this I could send the leftovers to you.

I didn't get a picture of how I cast the mount, but used 1/4" and 1/2" plywood forms with RTV smeared on them as release agent. Pic 5 is a shot of how I did it the first time with the wrong material. U-shaped plywood. This time I poured the material in from the front end rather than the back, and it worked much better.
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Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.