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#1
08-13-2025, 03:48 PM
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Rear tranny mount query??
Is there a solution to the "too tall" rear transmission mount? Muncie linkage is jammed into the floorpan with a new rubber mount.
They all seem to be 1.75 high or more! Needing about 1.50 height or less. 67 GTO, a factory manual car. Tried numerous vendor mounts, returned at counter, way too high. Solution??? |
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#2
08-13-2025, 03:54 PM
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Worst case would be to mod the crossmember.
Cut and drop the pad where the mount rests. You could easily drop it by 1/2” and maybe add shims if that’s too much. Some welding and fabricating involved but not rocket science. Original transmission crossmembers are readily available and fairly cheap, you could buy an extra one to mod if necessary.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/3.08 2002 WS6 Convertible LS1/4L60E/3.23 1966 VW Type 2 Single Cab Pickup 140hp 2276 1956 VW Type 2 Panel Van 36hp 1200 1957 VW Type 1 Beetle 180hp 2276 |
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#3
08-13-2025, 04:31 PM
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Energy Suspension 3.1158G (Black) R (Red) these are 1 5/8" tall
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65 LeMANS , SD performance 462ci Engine, Tremec TKX 5 speed with a 3.73 geared 8.5" 10 bolt |
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#4
08-13-2025, 05:33 PM
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That’s an odd one.
How are the body mounts ?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#5
08-14-2025, 07:07 PM
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Rear tranny mount
Mounts are brand new, engine isn't broken in yet!!
Chevelles have the same identical problem! |
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#6
08-14-2025, 07:12 PM
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Modify the crossmember.
After that the “too tall” parts store mounts will work.
__________________
1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/3.08 2002 WS6 Convertible LS1/4L60E/3.23 1966 VW Type 2 Single Cab Pickup 140hp 2276 1956 VW Type 2 Panel Van 36hp 1200 1957 VW Type 1 Beetle 180hp 2276 |
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#7
08-14-2025, 07:17 PM
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I've only run into that issue with aftermarket mounts. I prefer to not modify the cross member and just modify the mount. This is one reason I usually buy the poly mounts and I shave them down. In some cases they are too short out of the box and have to be shimmed.
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#8
08-14-2025, 07:24 PM
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You can also lower the entire crossmember by eliminating the rubber end cushions and clamps and just bolt the crossmember directly to the frame.
Drill a few holes and you’re done. My ‘64 GTO bracket car was like that when I first bought it, worked fine no issues. You should be able get that 1/4” your looking for or very close to that.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/3.08 2002 WS6 Convertible LS1/4L60E/3.23 1966 VW Type 2 Single Cab Pickup 140hp 2276 1956 VW Type 2 Panel Van 36hp 1200 1957 VW Type 1 Beetle 180hp 2276 |
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