prothane trans mount =s vibrarion

96laseredcobra · Mar 10, 2018

so I just installed a new prothane trans mount, old one mount was soft like a titty had play in it and when shifting the shifter would move. now there is no play at all but getting decent vibrations through gears . any advice would be great. motor mounts are new oem quality. is there a wrong way to install this dang thing?

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96laseredcobra · Mar 10, 2018

bump

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OLD H2S · Mar 10, 2018

I have been fighting the same thing. Look at the last page of my "It never ends" thread, the dyno pull vid shows a 2" kevlar web belt running from the driver fender to the driver side head on top of the engine. Look at the vid, no engine shake. I had solid engine mounts and the same tranny mount. The new ridgid engine set up was too stiff, I had too go back to stock rubber and the torque strap and now it is perfect.

96laseredcobra · Mar 10, 2018

OLD H2S said:
I have been fighting the same thing. Look at the last page of my "It never ends" thread, the dyno pull vid shows a 2" kevlar web belt running from the driver fender to the driver side head on top of the engine. Look at the vid, no engine shake. I had solid engine mounts and the same tranny mount. The new ridgid engine set up was too stiff, I had too go back to stock rubber and the torque strap and now it is perfect.

motor mounts are new oem parts. basically I wasted my money on the prothane mount? cause no issues with vibration before today. it would move on bumps felt while shifting. but no vibrations.

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OLD H2S · Mar 10, 2018

They are too hard, good for drag racing.

evilcw311 · Mar 10, 2018

Personal preference my friend. Some prefer smooth and factory feeling while others(such as myself) want to feel every lil thing possible.

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96laseredcobra · Mar 10, 2018

what if i take some sort of flat chunk of rubber and place it on the mount where it connects to the trans and the crossmemeber?

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96blak54 · Mar 11, 2018

evilcw311 said:
Personal preference my friend. Some prefer smooth and factory feeling while others(such as myself) want to feel every lil thing possible.

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^ this

I want an earthquake car! I essentially love driving next to a wall with my open exhaust! Oh how i love it!!!

OLD H2S · Mar 11, 2018

Back out ALL the nuts and bolts, 22mm engine mounts and rear trans mount and start the car. You need to get everything to adjust and settle together and unbind. Then start at the back and work forward tightening back up gently to spec.

SnakeBit! · Mar 11, 2018

I went with prothane motor mounts and stock tranny mount. got some addtl vibration from the motor mounts but not bad. was told to stay away from the urethane for the tranny for the reason you described. it's all in what you like.

OLD H2S · Mar 11, 2018

In the first picture it is showing misalignment on the mount to the cross member. Did you remember to reuse the stainless steel .010 thick shims on the engine mounts??? You must to get the left/right cant of the engine correct to the rear trans mount. Something is wrong...

96laseredcobra · Mar 11, 2018

OLD H2S said:
In the first picture it is showing misalignment on the mount to the cross member. Did you remember to reuse the stainless steel .010 thick shims on the engine mounts??? You must to get the left/right cant of the engine correct to the rear trans mount. Something is wrong...

shop did motor mounts , and the first pic if ya zoom in the angle looks off but the bracket and mount are flush.

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OLD H2S · Mar 11, 2018

Go look at the front bolts sitting in the big slots and make sure they are in the same position on each side , they must be perfect.

white95 · Mar 12, 2018

You lost me at:

old one mount was soft like a titty

:boobs:

DKblue98GT · Mar 12, 2018

I think OLD H2S is on the right track. I have Prothane motor and trans mounts in the Cobra and had the same setup in my GT with no issues. Probably a good idea to loosen all 4 mount bolts and make sure it's all settled.

evilcw311 · Mar 12, 2018

white95 said:
You lost me at:

:boobs:

(.Y.)

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96laseredcobra · Mar 12, 2018

DKblue98GT said:
I think OLD H2S is on the right track. I have Prothane motor and trans mounts in the Cobra and had the same setup in my GT with no issues. Probably a good idea to loosen all 4 mount bolts and make sure it's all settled.

so with no lift , can i just raise the front or should I raise the hole car again?

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evilcw311 · Mar 12, 2018

Best to do it on a lift. If you only jack up part of the car then your twisting it. This causes things to be in a bind already. You want it sitting as natural as possible when you break it all loose and retighten so that it all frees up and settles correctly.

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96laseredcobra · Mar 12, 2018

evilcw311 said:
Best to do it on a lift. If you only jack up part of the car then your twisting it. This causes things to be in a bind already. You want it sitting as natural as possible when you break it all loose and retighten so that it all frees up and settles correctly.

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crap no lift here, only jack stands

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