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Old 03-24-2011, 01:43 PM
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solid motor mounts/solid tranny mount

i have a s10 that i'm building just for drag racing. i have already put in solid motor mounts and i also put in a solid tranny mount, because the guy at the speed shop told me thats what i need. other people i've talked to said to do one or the other. are two solid mounts okay or should i put a different tranny mount in?
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Old 03-24-2011, 01:55 PM
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You take a big risk of breaking something if everything is mounted solid. I have seen a lot of people with solid engine mounts and a solid transmission mount an a broken bell housing to go with it.
Good mounts will keep things from moving to much but will still provide a little flex and vibration dampening
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Old 03-24-2011, 04:07 PM
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Keep the solid motor mounts to prevent movement but use a polyurethane or stock rubber trans mount. This will allow for a small amount of chassis flex.

Having all three solid mounts require a full tube chassis to prevent flex or it will break the transmission case if the chassis flexes at all.

This is the advice you'll get from anyone who builds racing automatics for a living. My race tranny guy told me this, and i've seen the same around the web from other transmission professionals.
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Old 03-24-2011, 04:08 PM
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I have a customer that tried solid mounts. S-10 Shorty. Roll bar and front supports. Broke belhousing at the engine mounting. I told him to replace a mount with rubber. He didn't. Broke three more 350 turbos before he finally put in a urethane trans mount. No more broken trans cases.
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Old 03-24-2011, 05:12 PM
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thanks guys kinda what i thought. no big deal to change the tranny mount, easy $20 fix.
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Old 03-24-2011, 05:16 PM
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Been there done that X2 with what Eric said keep the solids up front and stock rubber on the trans. Or polyurethane.


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Old 03-25-2011, 11:14 AM
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I use solid motor mounts and a stock mount for the tranny on my stock framed chevelle. 463HP and years of beating her down the track and no cracked bell housings. Life is good when you do your research prior to breaking stuff.
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