Revshift Trans Mount Insert ?
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This definitely makes sense. When I modified my shifter, I didn't use 1" pipe, The material I used only extends about 3/4" lower than the original shifter bottom and with the height boost from the insert, it is tight down there. Let us know what you find!
G
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·Sagging motor mounts and a taller trans mount may be contributing to the increased height of the driveshaft but the major factor is the bottom of the shifter is too low.
Just put mine in, got home from work and couldn't wait until tomorrow.... well "today" now.
info on car:
new trans has 700 miles on it
stock motor mounts installed by dealer yesterday
stock shifter, for now... UUC on the way
Borla cat back exhaust -pretty mellow until you get on it quite a bit.
GForce axles
I like it. It does change the feel of the shifter slightly. I think it may have helped with my wheel hop a little more also. Reverse is easier to get into; wasn't difficult with the new trans... but its even easier now. I feel zero additional vibrations, quarters in my little change holder by the cup holders did not make a sound while on my test drive. Shifter sits perfectly still also, while driving and when idling.
I do think the car "seems" louder now though, just a little, only noticeable when the windows are up. I hear the exhaust more... not that it is bad.
Either it is transmitting the sound, or maybe lifting the trans to install moved my exhaust around a little and I need to re-tighten.
For sure overpriced; but if I was making these and selling them.... I'd probably charge 50 bucks too.
info on car:
new trans has 700 miles on it
stock motor mounts installed by dealer yesterday
stock shifter, for now... UUC on the way
Borla cat back exhaust -pretty mellow until you get on it quite a bit.
GForce axles
I like it. It does change the feel of the shifter slightly. I think it may have helped with my wheel hop a little more also. Reverse is easier to get into; wasn't difficult with the new trans... but its even easier now. I feel zero additional vibrations, quarters in my little change holder by the cup holders did not make a sound while on my test drive. Shifter sits perfectly still also, while driving and when idling.
I do think the car "seems" louder now though, just a little, only noticeable when the windows are up. I hear the exhaust more... not that it is bad.
Either it is transmitting the sound, or maybe lifting the trans to install moved my exhaust around a little and I need to re-tighten.
For sure overpriced; but if I was making these and selling them.... I'd probably charge 50 bucks too.
Yes, car definitely sounds different, you guys think its the insert ? or do I need to get under there and check for exhaust leaks. I'll probably check anyways, but figured I'd get some opinions too.
thanks
thanks
Revshift Transmission mount insert + UUC short shifter = pure driving bliss 
I know that pissnuoff's shifter has a lot of good reviews, but I didn't want the "super" short throw, this is perfect.
I checked my exhaust and did find a small leak. The trans insert does transmit a little more of my borla's sound into the car; nothing wrong with that... I'm just giving my two cents for anyone thinking about the insert. No extra vibrations. Shifter sits perfectly still.
Shifter is so precise... and I've only driven it a mile or two so far. Time for bed.... :cloud9:
I know that pissnuoff's shifter has a lot of good reviews, but I didn't want the "super" short throw, this is perfect.
I checked my exhaust and did find a small leak. The trans insert does transmit a little more of my borla's sound into the car; nothing wrong with that... I'm just giving my two cents for anyone thinking about the insert. No extra vibrations. Shifter sits perfectly still.
Shifter is so precise... and I've only driven it a mile or two so far. Time for bed.... :cloud9:
Hate to say this... but I toook the insert out to see how I liked the car with just the UUC shifter + shifter bushings.
I think I like it better without the revshift insert, with the insert gears 1 and 3 are so smooth at the expense of 2 and 4 being MORE notchy. Not terrible, but the short shifter was a huge improvement while the insert... i'm not sure. BTW, I have brand new stock motor mounts in.
Thinking about sanding the insert down a little and putting it back in, I like the idea of supporting the trans mount, but it seemed to me that this is so tall that it takes on all the support. I say this because with it in, the rubber on the trans mount was soft since this was sandwiched in there. Seems I would want the trans mount to still be supporting the trans a little.
I think I like it better without the revshift insert, with the insert gears 1 and 3 are so smooth at the expense of 2 and 4 being MORE notchy. Not terrible, but the short shifter was a huge improvement while the insert... i'm not sure. BTW, I have brand new stock motor mounts in.
Thinking about sanding the insert down a little and putting it back in, I like the idea of supporting the trans mount, but it seemed to me that this is so tall that it takes on all the support. I say this because with it in, the rubber on the trans mount was soft since this was sandwiched in there. Seems I would want the trans mount to still be supporting the trans a little.
I also recently installed this and at first had a LOT more vibration in the car, which settled down a little bit over the last few days. It did mostly resolve my issue with "finding" Reverse and some notchiness when shifting all gears, but made it harder to use 6th gear (who needs 6th anyway ...). My main issue is the amount of noise I'm getting in the cabin from the engine/exhaust, which seems to have gotten much louder and much more rumble in my seat since installing the insert. I double-checked the header band clamps which are right under my seat and they don't appear to be leaking, so I'm assuming that it's just the insert transmitting sound into the car. I'm usually not against "louder", but this isn't louder in a good way, it sounds like a giant sewing machine at 3K RPM, rather than a rumbling beast and was fairly quiet without much vibration before the insert. I'm debating taking it out to see which way I prefer, since it's so easy to install after you know how to do it.
Just curious, how did you take it out? Any tips you can share? I was thinking of using a c-clamp and some small blocks to push it back out.
How are your motor mounts? If they are bad then the insert can transmit the nvh from the bad motor mounts. Usually when people install our motor mounts and trans insert together they say that its nice and smooth. Sagging motor mounts could be the cause of the difficulty going into 6th gear as well.
They're brand new OEMs installed by the dealer less than 400 miles ago, where they removed the headers and replaced the band clamps with brand new ones that I provided. My preference would have been non-OEMs, but since I wasn't paying for it ... I let them install what they'll "support".
I installed the trans insert a couple of days after getting the car back and can only correlate the increased noise with the transmission insert until I take it out and determine that the extra noise/vibration has to do with something from the motor mount install gone awry or a new issue that's developed.
Interesting. There is definitely some more investigating needed. It is common for stiffer polyurethane parts to help identify other issues that need addressing. Keep me posted on what you find.
Thats interesting.. because I put my insert in right after the dealer replaced the stock motor mounts; and same results.
As far as removing it, I remember using the hammer again as a lever, and a screwdriver, and probably something else to help push it out; don't remember exactly.
Joined
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2,046 Posts
You guys need to be more patient. The noise and vibration will settle down over a period of about 2-3 weeks.
Hahaha Fuzzy, I'm trying man! I do admit that the vibration is not nearly as bad as it was the first time I drove it after the insert, but I'm getting impatient. It just sounds and feels much "different" than it used to and it makes me think that there is something else going on now. I cannot fathom what it could be, the engine purrs like a kitten (read LION) at idle, but the vibes and cabin noise at 3K-4K RPM feels like a giant sewing machine. 5th and 6th gear seem to be fine, when you're running at lower RPMs, but when you get on it the slightest bit, it doesn't sound "good" inside the car. That's the best way to describe it.
Previously with headers, HF cats and stock exhaust, the cabin was pretty quiet and not much in the way of vibration at all. Only one of the MMs was completely busted and the other was pretty weak but didnt explode yet. The dealer replaced both and I don't notice a huge difference in startup/shutdown, but there is a lot less slop when romping on it now. Over the weekend I can get some help troublshooting, so I can hear what it sounds like outside of the car and go from there. I have no CELs, no major exhaust SMELL inside the car unless I sit still for a long time and rolling down the windows doesn't convince me that it's the headers/exhaust that's creating the noise, so I was willing to pop the insert out and see what it was like without it again.
All I can think of is that the stock mounts, even when new, cause a lot of play in the engine bay that's being transferred down the drivetrain and traveling up the solidified mount with the revshift insert. If you had more solid mounts like revshifts or UMIs, that vibration would be dampened by the entire car.
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2,046 Posts
All I can say is when I first installed the transmission block, I couldn't put anything in the cup holders because it would vibrate like nuts at around 3,000 RPM. I considered taking out the block, but (fortunately) didn't have an opportunity for several weeks. As it turned out, after a couple of weeks, the sound and vibration died down to an acceptable level, but it still wasn't quite normal. After a couple of months, things were totally normal. I don't know whether its Revshift's poly that's settling, the OEM rubber settling, the mount sliding into a more natural position, or something else, but I know for a fact that its not me becoming acclimated to the sound and vibration, and I also know that the improvement in shifting has stuck.
Interesting idea, considering both Sevilian and I had similiar issues, both with Stock MMs. Thanks HAMSTAR.
Ok Fuzzy, I'll bite ... leaving it in. 3000 RPM is exactly where it's driving me nuts. It is MUCH colder today, 40 degrees compared to 60+ yesterday and first thing in the morning I got far less vibration/sound etc. when the car was cold than yesterday afternoon. Since the headers were removed to do the MM's, I'm going to check them this weekend to make sure they're torqued to the right setting and ride it out. I have a 600 mile road trip next weekend, so maybe that will speed things up.
As usual, thanks for your contributions and listening to my ramblings ...
After installing my Trans insert, I had a slight vibration increase. I just finished installing the Revshift MM's a couple days ago, and my vibration is ZERO now. The Trans insert had been in the vehicle for a month before MM install. My exhaust noise level has also decreased to a minimum, unless I'm lead-footing it...which I always do. Both of those mounts were the 80A Blue. I will be going with 95A Cradle/Trailing Arm/Control Arms once all are released. Other than a longer than expected wait due to Black Friday flooding sales, I am EXTREMELY please with Revshift products and customer service!
This is what I am thinking too. I didn't want to say it before someone else because I didn't want anyone to think I was just pulling excuses out of the air. It is possible that the frequency of the new oem mounts and the frequency of the polyurethane insert are reacting with each other somehow around 3000 rpm and causing vibration. Then, once everything is broken in, the frequencies change a bit and everything is smooth. Obviously, with polyurethane motor mounts and trans insert the frequencies would be similar which would not cause any strange interactions or sudden vibration.
This further makes me think that the frequency of the oem motor mounts is somehow countering the polyurethane insert in some situations. The polyurethane motor and trans insert work well together and make everything nice.
Glad to hear you are happy, FoD! We do our best!
This theory coincides with my impression that the noise/vibration isn't as intense when the car is cold, which is the opposite of what I would have anticipated. The stock MM's should be more rigid at lower temperatures, but when the engine bay warms up, the stock MM's could be flexing more and allowing the noise to travel to the most rigid point which is now the trans insert.
I couldn't pass this up ... care to rush order a free set of 80A MM's and I'll install between them to "test" this theory
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