prothane trans mount =s vibration

[cheaneyt]

I installed a new trans mount, now getting vibration, motor mounts are new oem quality. old mount for trans was soft like a titty . install went well . vibrations are bugging me . will they go away?

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[cheaneyt]

bump

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[cheaneyt]

another bump come on fellas , anything?

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[cheaneyt]

anyone?

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[97snakebite]

Am i the only that thinks the picture don't look right? Kinda looks crooked.

 

[PhoenixM3]

Is pro thane a polyurethane Mount? If so, and stock mount is rubber, the answer is yes. If somehow the mount is crooked or over-compressed, that could cause more vibration too.

 

[cheaneyt]

Am i the only that thinks the picture don't look right? Kinda looks crooked.

that's the odd shape of the trans itself. zoom it and you'll see. I have fifty times. lol

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[cheaneyt]

Is pro thane a polyurethane Mount? If so, and stock mount is rubber, the answer is yes. If somehow the mount is crooked or over-compressed, that could cause more vibration too.

how do you mean?

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[Mojo88]

I've been monkeying with muscle cars for many decades and in my experience, any time you swap OEM bushings to poly bushings you have a very good chance for increased NVH (noise, vibration & harshness).

However, it is also worth double checking to make sure the tranny (or any part of it, or anything attached to it) is not actually contacting the floorpan. This would also cause a vibration.

 

[04DeadShort]

In my experience the Prothane (black) bushings are stiffer than the Energy (red) brand. The oem mounts will absord or insulate most of the vibration into the rubber until they wear out. The Prothane will absord it back into the car frame. They are not much softer than a solid mount. You gonna have a more solid feel but the trade off is you feel everything. Lol. I'm running the red Energy mounts and I'm happy. But I have motor and tranny mounts.

 

[cheaneyt]

gonna add these and see what's what.

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[98 svt]

gonna add these and see what's what. View attachment 1472401

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Won't that negate the purpose of the prothane poly mount though?

 

[SHIFTYBUSINESS]

That's part of the deal with the harder mounts. If you have them installed correct the extra vibration will not just go away one day.

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[Mojo88]

Another thing to consider is: super-strong tranny mounts are only needed for extreme power levels. At least, that's what I have read numerous times. Maybe just revert back to stock-type mount.

 

[cheaneyt]

Another thing to consider is: super-strong tranny mounts are only needed for extreme power levels. At least, that's what I have read numerous times. Maybe just revert back to stock-type mount.

thinking thats what ima do

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[Helomech74]

Did you measure the distance of the trans tail shaft output to the floor pan of the car before and after the install of the mount? You might have altered the driveline angle by raising or lowering the rear the transmission, this will induce plenty of vibration. I've never noticed much difference in vibration going to a poly mount. I personally run solid engine mounts and a poly trans mount and I don't notice much more vibration at all.

 

[cheaneyt]

Did you measure the distance of the trans tail shaft output to the floor pan of the car before and after the install of the mount? You might have altered the driveline angle by raising or lowering the rear the transmission, this will induce plenty of vibration. I've never noticed much difference in vibration going to a poly mount. I personally run solid engine mounts and a poly trans mount and I don't notice much more vibration at all.

the old mount was damaged pretty good,so I'd imagine it was sagging a bit. all i did was swap one for the other. is there a way to tell if its not right? and how would I straighten it up if so?

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[cheaneyt]

so took er to a shop , trans mount is good to go. my install was on point. however the rear control arm bushings are out. mine are sve tubular look like the ones in first pic. replacement bushings on way asap.

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[cheaneyt]

bushings in route. should be fun taking the rear end apart.

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[96GT226410]

bushings in route. should be fun taking the rear end apart.

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It's not hard.

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