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Rear tranny mount...poly or rubber?

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Old Jul 16, 2005 | 08:36 PM
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Default Rear tranny mount...poly or rubber?

Had to change my exhaust hanger today from 2" to 2.5", which required removing the crossmember and rear tranny mount (TH-400). The existing mount (rubber) is mush...appears to be original.

Since I have to get a new one...is the poly mount too rigid for street use? I'm not into performance, just cruising and don't want to hear/feel vibration thru the mount.
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Old Jul 16, 2005 | 10:21 PM
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I would say that if you are still using rubber motor mounts then stay with the rubber. The torque of the engine with the rubber mounts may stress the poly mount more then it was designed for.
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Old Jul 17, 2005 | 12:56 AM
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Originally Posted by Sharktail
I would say that if you are still using rubber motor mounts then stay with the rubber. The torque of the engine with the rubber mounts may stress the poly mount more then it was designed for.
That makes sense...rubber it is.


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Old Jul 17, 2005 | 07:30 AM
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I actually have a brand new TH400 rubber mount for sale $10 + shipping. Send me your email for a pic.
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Old Jul 17, 2005 | 07:43 AM
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energy suspension .motor and trany mounts. there made for high torque apps..
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Old Jul 17, 2005 | 08:07 AM
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Originally Posted by Sharktail
I would say that if you are still using rubber motor mounts then stay with the rubber. The torque of the engine with the rubber mounts may stress the poly mount more then it was designed for.
The tranny mount should be the same material or softer than the motor mounts. I run a poly motor mount on the driver side (sees the most torq) and rubber for the passenger side and trans mount, the eng barely moves but I could tell no difference in vibration.
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Old Jul 17, 2005 | 11:24 AM
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Originally Posted by 7t2vette
I actually have a brand new TH400 rubber mount for sale $10 + shipping. Send me your email for a pic.
Are you local (SoFLA)?

I have to order a bunch of stuff from the catalogs, so I'll probably just throw one in the cart.

Thanks for the offer!

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Old Jul 17, 2005 | 02:05 PM
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I am located in Canada.
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