Urethane Transmission Mount

RCZ · 03-08-2010, 01:07 PM

Here's the review, just in case people dont know where to find the journals.

OK, so here's the review as promised.

Installation:

It was extremely easy. Its 6 bolts and its done. Very easy access, doesn't require any special tools, however you do need to find a way to support the transmission so it doesn't sag when you take off the mount.

This is what you are looking for under the car. Its right by where the driveshaft starts:

Support the transmission somehow. We used this guy, but you can use whatever as long as its sturdy enough to hold up the weight:

Remove the bolts:

Stock Mount:

Side by side comparisons.

Removed:

Z1 Mount on. Make sure the "arrow point" is pointing towards the back of the car:

After that, just put the bolts back in and your are done.

Thoughts:

Alright, so did it make a big difference? Absolutely. On the pro side, it made shifts much more positive. Shifting feels very consistent in every situation. It feels crisper and more exact when you put it into gear. You get this sensation like no matter what you are doing; accelerating or decelerating, the shifter is attached to something that is completely solid instead of something that has some give to it. As expected, that off-throttle jerking in low gears has been reduced. Instead of getting a sort of reverberating stop-go jerkiness that you get with the stock mount, you get this "load, unload, over" type of a feeling. Its hard to describe. Think of it this way... with the stock one it feels like the transmission is moving back and forth as it loads with the engine. With the hardened mount it feels like the whole car is a solid piece being acted on by the loading/unloading of the engine. You still feel it jerk, but it does it less and less abruptly.

Now the problem is this... and you folks knew there was a problem coming.

We know our engine and tranny are notoriously coarse as we go up in the RPMS, well guess what...you can hear and feel EVERYTHING. You can hear the synchros speeding up and slowing down when you put the clutch in and out. You can hear every little engine sound, clutch sound and chassis sound X100. Sounds like I have straight cut gears inside the car. If that wasn't bad enough, as you can imagine, huge amounts of vibration is transferred into the cabin. When I got home after the install, my whole body had that tingling sensation you get when you hold on to something tha'ts vibrating for too long. Just revving the car in neutral shakes you like a massage chair. My friend was joking that its a nice massage mod and that maybe girls would really love it.

I talked to Z1 and they said to give it a few hundred miles to let it bed in because it should get a little better. I drove around 100 miles this weekend and it has not really improved much. I am going to leave it in for the week and see if there is any improvement in NVH levels. It feels so good for shifting that I really don't want to let this one die. Please keep in mind that it is a product in development and it still needs to be altered a bit before production. I think if we made it less stiff it would get rid of a lot of the NVH, but it will also feel more like the stock one.

I think this would be excellent on a dedicated race car, but as it is right now, I don't feel the level of NVH is acceptable for a street driven car. Perhaps what we need are shifter and differential bushings + a softer version of the transmission mount. I am not happy that the side effects were so bad since shifting feels excellent. Way more composed and consistent than the stock one. Z1 said they would look into lowering the stiffness of the bushing if it's necessary. He will probably chime in and tell us what the plan is.

Daishi · 03-08-2010, 03:41 PM

which version did you get?

theDreamer · 03-08-2010, 03:43 PM

Quote:

Originally Posted by Daishi

which version did you get?

RCZ got the comfort version.

Daishi · 03-08-2010, 03:48 PM

Quote:

Originally Posted by theDreamer

RCZ got the comfort version.

lol real comfortable i see... hah

bluestyle55 · 03-08-2010, 05:40 PM

dammit....i had really high hopes for this. I dont think I would be able to live with a vibration that would make my arm tingly and all the reported engine/tranny noise. LOL...wonder what the race version would be like??

RCZ - thanks for testing this and doing the write up!!

RCZ · 03-08-2010, 10:05 PM

don't count it out just yet. It's supposed to get better with time.

You are all welcome and thanks to everyone who gave me rep, I appreciate it.

1slow370 · 03-09-2010, 04:10 AM

ok i think i'm going to go delrin now that should be friggen stiff might get it rollcoated in some urethane or rubber at work to provide a little bit of dampening. would you say it was ripples in a cup of water in the cup holder vibrationy or water shooting out the cup bad, should be an easy test for comparisonor just a bottle of water half full maybe a video to showcase.

tonybui · 03-09-2010, 05:06 PM

Sorry for my limited English, What does this thing do exactly ??

RCZ · 03-09-2010, 07:04 PM

Quote:

Originally Posted by 1slow370

ok i think i'm going to go delrin now that should be friggen stiff might get it rollcoated in some urethane or rubber at work to provide a little bit of dampening. would you say it was ripples in a cup of water in the cup holder vibrationy or water shooting out the cup bad, should be an easy test for comparisonor just a bottle of water half full maybe a video to showcase.

I can swing that with my iphone tomorrow. Remind me during the day.

bluestyle55 · 03-09-2010, 07:20 PM

Quote:

Originally Posted by tonybui

Sorry for my limited English, What does this thing do exactly ??

After reading RCZ's write up....looks like it would serve as a good vibrator for the lady friends.

Besides that though...its intended to make shifting less spongy feeling. More precise shifts…

WShade · 03-09-2010, 07:59 PM

Talking about vibration, this is nothing. I had solid mounts in my Mazda and eventually got use to it.

1slow370 · 03-10-2010, 04:05 AM

well i probably won't be up during the day as i am a night lord 2nd shifter. i realize there might be some problems with said test as driving the car itself would make the water go nuts. would be an indication maybe revving it in neutral and sound on the vid for how loud it got.

RCZ · 03-10-2010, 11:33 AM

Yeah, I'll get something for you guys. It has quieted down a bit though...just a bit.

RCZ · 03-10-2010, 03:10 PM

I am a man of my word, here's a quick video of the car at idle and revving with the glass of water.

Turn your speakers up, its an iphone video so its not exactly HD, but it gets the point across. That clanking you hear is me putting the clutch in and out in neutral. You can hear the tranny winding up when I let the clutch out. Revving you can hear how much sound is transmitted into the car.

I have to say thought, NVH has decreased a lot since the install. I will take another video for you folks in about a week or so. At this point it's still not daily drivable for me.

1slow370 · 03-11-2010, 02:48 AM

i'd rep for the follow up but the board won't let me someone else rep him for me.

View Poll Results: Would you be interested in a urethane transmission mount?
Yes	52	91.23%
No	5	8.77%
Voters: 57. You may not vote on this poll

03-08-2010, 05:40 PM	#80 (permalink)
bluestyle55 Premium Member Join Date: Apr 2009 Location: Pa Posts: 194 Drives: 09 Nissan 370z B 6M Rep Power: 16	dammit....i had really high hopes for this. I dont think I would be able to live with a vibration that would make my arm tingly and all the reported engine/tranny noise. LOL...wonder what the race version would be like?? RCZ - thanks for testing this and doing the write up!! __________________ 2009 370z 6MT Touring w/ Sport Pkg \| Invidia Gemini CBE\| Stillen G3 CAI \| ERZ HFC's \|X-Pel Clear Bra \| 20% Tint

03-09-2010, 04:10 AM	#82 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7250	ok i think i'm going to go delrin now that should be friggen stiff might get it rollcoated in some urethane or rubber at work to provide a little bit of dampening. would you say it was ripples in a cup of water in the cup holder vibrationy or water shooting out the cup bad, should be an easy test for comparisonor just a bottle of water half full maybe a video to showcase. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

03-09-2010, 07:59 PM	#86 (permalink)
WShade Track Member Join Date: Jan 2009 Location: San Antonio, TX Posts: 765 Drives: 09 370Z T/S/N Rep Power: 187	Talking about vibration, this is nothing. I had solid mounts in my Mazda and eventually got use to it. __________________ Q50S Q60 RS400

03-10-2010, 04:05 AM	#87 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7250	well i probably won't be up during the day as i am a night lord 2nd shifter. i realize there might be some problems with said test as driving the car itself would make the water go nuts. would be an indication maybe revving it in neutral and sound on the vid for how loud it got. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

03-08-2010, 01:07 PM	#76 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1118	Here's the review, just in case people dont know where to find the journals. OK, so here's the review as promised. Installation: It was extremely easy. Its 6 bolts and its done. Very easy access, doesn't require any special tools, however you do need to find a way to support the transmission so it doesn't sag when you take off the mount. This is what you are looking for under the car. Its right by where the driveshaft starts: Support the transmission somehow. We used this guy, but you can use whatever as long as its sturdy enough to hold up the weight: Remove the bolts: Stock Mount: Side by side comparisons. Removed: Z1 Mount on. Make sure the "arrow point" is pointing towards the back of the car: After that, just put the bolts back in and your are done. Thoughts: Alright, so did it make a big difference? Absolutely. On the pro side, it made shifts much more positive. Shifting feels very consistent in every situation. It feels crisper and more exact when you put it into gear. You get this sensation like no matter what you are doing; accelerating or decelerating, the shifter is attached to something that is completely solid instead of something that has some give to it. As expected, that off-throttle jerking in low gears has been reduced. Instead of getting a sort of reverberating stop-go jerkiness that you get with the stock mount, you get this "load, unload, over" type of a feeling. Its hard to describe. Think of it this way... with the stock one it feels like the transmission is moving back and forth as it loads with the engine. With the hardened mount it feels like the whole car is a solid piece being acted on by the loading/unloading of the engine. You still feel it jerk, but it does it less and less abruptly. Now the problem is this... and you folks knew there was a problem coming. We know our engine and tranny are notoriously coarse as we go up in the RPMS, well guess what...you can hear and feel EVERYTHING. You can hear the synchros speeding up and slowing down when you put the clutch in and out. You can hear every little engine sound, clutch sound and chassis sound X100. Sounds like I have straight cut gears inside the car. If that wasn't bad enough, as you can imagine, huge amounts of vibration is transferred into the cabin. When I got home after the install, my whole body had that tingling sensation you get when you hold on to something tha'ts vibrating for too long. Just revving the car in neutral shakes you like a massage chair. My friend was joking that its a nice massage mod and that maybe girls would really love it. I talked to Z1 and they said to give it a few hundred miles to let it bed in because it should get a little better. I drove around 100 miles this weekend and it has not really improved much. I am going to leave it in for the week and see if there is any improvement in NVH levels. It feels so good for shifting that I really don't want to let this one die. Please keep in mind that it is a product in development and it still needs to be altered a bit before production. I think if we made it less stiff it would get rid of a lot of the NVH, but it will also feel more like the stock one. I think this would be excellent on a dedicated race car, but as it is right now, I don't feel the level of NVH is acceptable for a street driven car. Perhaps what we need are shifter and differential bushings + a softer version of the transmission mount. I am not happy that the side effects were so bad since shifting feels excellent. Way more composed and consistent than the stock one. Z1 said they would look into lowering the stiffness of the bushing if it's necessary. He will probably chime in and tell us what the plan is.

03-08-2010, 03:41 PM	#77 (permalink)
Daishi Track Member Join Date: Jul 2009 Location: NJ Posts: 683 Drives: 09 370z 6Speed Rep Power: 16	which version did you get?

03-08-2010, 10:05 PM	#81 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1118	don't count it out just yet. It's supposed to get better with time. You are all welcome and thanks to everyone who gave me rep, I appreciate it.

03-09-2010, 05:06 PM	#83 (permalink)
tonybui A True Z Fanatic Join Date: May 2009 Location: Maryland Posts: 1,397 Drives: 09 Sports 6 Speed Rep Power: 426	Sorry for my limited English, What does this thing do exactly ??

03-10-2010, 11:33 AM	#88 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1118	Yeah, I'll get something for you guys. It has quieted down a bit though...just a bit.

03-10-2010, 03:10 PM	#89 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1118	I am a man of my word, here's a quick video of the car at idle and revving with the glass of water. Turn your speakers up, its an iphone video so its not exactly HD, but it gets the point across. That clanking you hear is me putting the clutch in and out in neutral. You can hear the tranny winding up when I let the clutch out. Revving you can hear how much sound is transmitted into the car. I have to say thought, NVH has decreased a lot since the install. I will take another video for you folks in about a week or so. At this point it's still not daily drivable for me.

03-11-2010, 02:48 AM	#90 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7250	i'd rep for the follow up but the board won't let me someone else rep him for me. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

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