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CTS-V
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I have had my V for about 2 months and thought i would add my 2 cents to this subject.

I replaced my motor mounts last month with the revshift blue mounts, then installed the transmission mount insert the next weekend. I noticed an increase in sound in the cab similar to some of the previous posts. Some additional vibrations were felt initially, mainly in the floorboard and pedals.

The vibrations did reduce to an unnoticeable point after a few weeks, but the noise is what I find intolerable. It can be heard at almost all rpm, and is similar to an exhaust sound except higher pitch. I also now hear more transmission noise, for example, gears clicking during shifting and spinning sounds while in neutral.

I have no complaints against the revshift insert as a product, it really gave the shifting a much better and more solid feel. However, vibration and noise is an individual preference, and for me it is a little too much. My V is stock and my daily driver, so comfort slightly outweighs performance in this area.

I read some other threads about Creative Steel's "caddy soft" mount and some people who tried it with success in terms of vibration/sound. They don't make that mount anymore but have a new style mount that is supposed to be good for reducing the vibrations. I'm going to give it a try. It has a hardness of 40 versus the Revshift insert at 80. After I get it installed this weekend I will give a report back.
 

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CTS-V
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I few words about the Creative Steel mount. It appears to be good quality in its construction. The polyurethane is softer, it gives a little when I push on it hard with my fingernail, the Revshift I couldn't make an indention. This is logical as the CS mount is 40 hardness and the Revshift is 80. The holes properly aligned with the transmission and the studs on the bottom were straight, aligned easily in the support and had plenty of length.

PLEASE NOTE: I am not saying the Revshift is a poor product or inferior construction! I am completely satisfied with their motor mounts and am considering using some of their bushings.

I installed the the transmission mount and tested it out. The quality of the shifting is still good and it goes into reverse easily. There are no new or noticeable vibrations, similar to the revshift once it "broke in."

The biggest difference is in the sound. There is no more spinning sound from the transmission or gear clicking sounds as I mentioned in my earlier post. The car is much quieter throughout the RPM range, though not back to the Cadillac quiet with the original mount. I can hear the radio better at highway speeds and don't have any reverberating or droning sounds.

The important thing is that, for my use, it is quiet enough. I think I had realistic expectations. I did not expect to obtain stock sound levels, but rather reduce the noise to a level tolerable to me. If this was a pure play car or a track car these would not have been issues for me. The CS mount gave me a good blend of accurate shifting and low noise/vibration levels.

Hope this helps anyone debating the two and what they are using it for!
 

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CTS-V
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On the stock mount, what holds the rubber to the metal plates ?

I have the insert in there, but 1st and Reverse do not seem to slide in like I remember when I first installed the insert. Trans has been replaced since; insert is still in there. Just wondering if the rubber is separating from the mount.
Even if the rubber separated, it is all held together by gravity and that big center pin.
 

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CTS-V
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No difference that I can see in the movement of the shifter. Reverse is still a little tricky sometimes, however, a quick shift to second and then to reverse usually works smoothly.

Other than that shifts are smooth.
 
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