Life of a transmission mount

[thstone]

Originally Posted by Chard

Are there upgraded, polyurethane mounts that people use? Stiffer mount and takes away the future leak issue.

Yes, there is a semi-solid transmission mount available. However, I wouldn't recommend this for street driving (unless you can live with it) as there will be a very noticeable increase in engine/transmission vibration.

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[aclark133]

Originally Posted by thstone

Yes, there is a semi-solid transmission mount available. However, I wouldn't recommend this for street driving (unless you can live with it) as there will be a very noticeable increase in engine/transmission vibration.

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On Pelican Parts they suggest not to use wevo mounts on both the motor and transmission, because of the risk of knock sensors reducing power. Is this true?

[thstone]

Originally Posted by aclark133

On Pelican Parts they suggest not to use wevo mounts on both the motor and transmission, because of the risk of knock sensors reducing power. Is this true?

Not sure about the knock sensors reducing power, but the combo of a solid engine mount with a semi-solid transmission mount will significantly increase engine/transmission vibration. You'll definitely feel it in the drivers seat. The only Boxster's that I know who run this setup are dedicated race cars.

[jaykay]

Originally Posted by thstone

Not sure about the knock sensors reducing power, but the combo of a solid engine mount with a semi-solid transmission mount will significantly increase engine/transmission vibration. You'll definitely feel it in the drivers seat. The only Boxster's that I know who run this setup are dedicated race cars.

Been in a Cayman R with this setup and I would heed these words....you will be riding in a buzz machine....high intensity track work will block it out to some degree probably because of high rpm and concentration but for the street and low intensity track you will likely not be happy

[Yellow986S]

It's time to change my motor mount and tranny mount.
I am thinking of using a semi sold motor mount and just a new oem tranny mount.
Will there be a lot more vibrations because of using a semi solid mount together with a stock mount?
I am trying to get rid of the slack and stiffen up the car a little but don't want something too stiff that it is not enjoyable.

[Jamesp]

Just changed out the front rubber/metal cylindrical mount in my box yesterday. Getting ready to install the engine after a complete rebuild. If you do not have access to a press, I'd suggest buying the entire aluminum mount with the insert already in it if you are going back to the stock rubber mount. I replaced just the rubber / metal cylinder using a hacksaw (removal - easy) and for installation, a large clamp, 2 1/2 PVC conduit reducer, 3 pound sledge hammer, and a machinist vice as a press. I broke the clamp, the PVC reducer, and the vice. The sledge hammer survived. My back is still sore. If I can manage to upload the photos I'll post them on the DIY section, only this is a DDIY (Don't do it yourself). If I were to do it again, I'd buy the entire mount assembly, and just bolt it in.

[thstone]

Originally Posted by Yellow986S

It's time to change my motor mount and tranny mount.
I am thinking of using a semi sold motor mount and just a new oem tranny mount.
Will there be a lot more vibrations because of using a semi solid mount together with a stock mount?
I am trying to get rid of the slack and stiffen up the car a little but don't want something too stiff that it is not enjoyable.

The semi-solid motor mount alone was too much vibration for me on the street. You could noticibly feel it (and see the vibration in the mirrors) at a stop light. That big chunk of rubber in the OEM engine mount does a surprisingly good job at dampening.

Of course, your tolerance level might be different/higher but I do drive my Boxster to/from the track and around town a bit with 450/500 lb springs and the PSS9's set to full hard so I'm not afraid of some harshness.