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tranny mount vibrating

Old 03-29-2006, 01:09 AM
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Question tranny mount vibrating

hey guys i had a prothane tranny mount installed yesterday and the car feels wierd to me. i drove it about 150 miles today and i know they will give more vibration because they are stiffer but i just dont feel right. i had a tranny shop do it and i watched them to make shure they did it right so i dont know whats up. my exaust seems to resonate more and even sound louder in the car [maybe just in my head?]
is there any adjusting that needs to be done when you swap the mount?
it seems to be ok when it shifts and it dont bang or any thing but i a little scared to get on it lol and the center console sound like it wants to blow up lol
any ideas?

thanks a lot guys.

p.s. i have heard that to much vibration can cause knock retard is this true?
Old 03-29-2006, 01:25 AM
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Are you sure its installed correctly and at the right angle?

I really noticed no big difference with mine until I got over 60mph. Just driving around town you really have to pay attention to even notice, but then again i've been driving around with dumped TSP duals too. I also have prothane motor mounts and a good converter so it may feel different than yours. Mine is rather smooth, for what it is.
Old 03-29-2006, 01:33 AM
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well i left it up to the guy that put it in so im not shure about the angle but the mount looked the same all around so i dident know that it was directional.
any more ideas?
Old 03-29-2006, 01:45 AM
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mine did that too when i got it..my car would vibrate like a bed in a ***** house...after about 1k miles it starts to get a lot better...it breaks in and isnt as stiff. I was paranoid as **** like you are when i first did mine.
Old 03-29-2006, 02:05 AM
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if my car was shakeing like a bed at a ***** house id be haveing fun lol. but any way even my cuzz rode in it and he said it felt like the rear end was broke lol. **** it has me worried and even when i got on it at about 65 it vibrated like **** ive read it had to break in but i might have a guy that works on f-bodys just for the hell of it.
Old 03-29-2006, 02:16 AM
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yah mine vibrated from about 55ish to about 75ish...its gotten soo much better tonight even my gf was like ur car isnt as shaky anymore...and i did my mount on jacks in the driveway...
Old 03-29-2006, 08:20 AM
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I thought something was really wrong with mine and I got use to it.
Old 03-29-2006, 08:36 AM
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The mount will couple more of the driveline vibe to
the crossmember. But you may (or not) also have
more vibration if the mount is a different installed
height than stock, changing the driveline angle by a
degree or two. Some mounts need bumps grouns down,
a plate left off, etc. You could experiment with that,
shimming or unshimming stuff and see if any change
is better/worse. If you have an adjustable TA then
that might be worth re-adjusting, up/down a hair, to
see that way instead of lifting the trans.


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