Pontiac Solstice Forum banner

1 - 20 of 22 Posts

·
Registered
Joined
·
224 Posts
Discussion Starter #1
I ordered and installed the JPM coachworks shift kit a few months ago and love the feel and look, however, the noise when in second gear and third is driving me insane! :brentil: I have researched this issue and found that others have experienced the same symptoms, but did not uncover any real fixes.

I tried retightening both bolts holding on the shifter, adjusting the knob, adjusting the height of the collar and added foam padding inside of the top of the knob and collar. Again, I really enjoy having the shifter, but the noise gets very annoying and makes it difficult to enjoy driving during times when I would rather listen to the exhaust and sounds of the car (I don't consider the shifter rattle part of these sounds) than crank the stereo.

Any other experience with this issue or potential fixes would be appreciated.
 

·
Registered
Joined
·
523 Posts
The fix is easy.
Go back to the stock shifter.
 

·
Registered
Joined
·
7,173 Posts
I have the JPM shifter, but with a Hurst knob, but still have the resonance noise. In my case I had to pack all the spaces above the shaft inside the knob with mastic and that cures it for a while. Then every so often it comes back and I re-pack and it goes away again.

May not be the same fix given you have a different knob, but you can at least try it.
 

·
Registered
2009 Mysterious GXP Coupe #100
Joined
·
2,733 Posts
I added sound deadening around the shifter. Worked like a charm.

The stock shifter is weighted to cut down the noise.
 

·
Super Moderator
Joined
·
16,393 Posts
The vibration as TS pointed out is a result of a change in harmonic frequency of the shifter and internal mechanisms. The way to eliminate the sound is to change the mass or add damping material. Try installing a weighted shift knob. As heavy as you can find and see if that addresses your issue. Then you can play with different mass values.
 

·
Registered
Joined
·
609 Posts
I called JPM about this resonance noise soon after I got my shifter installed. Joe offered up up a stainless steel shift ball as an option. The weight is nearly identical to the OEM shifter and eliminated the noise. Call him back and inquire about it. Only downside for me to the stainless steel ball was that it is not etched with the shift pattern.
 

·
Premium Member
Joined
·
3,198 Posts
Wow, I have never heard of this noise issue. I have had my JPM shifter for 4 years with no issues and I love it. I had Joe install it so maybe he just did his magic?:thumbs:
 

·
Registered
Joined
·
224 Posts
Discussion Starter #9
Thank you all for the suggestions and possible fixes. A few of those I haven't tried yet, so I will play around with some mentioned options and see what happens. Of course going back to stock is out of the question for me because the JPM shifter feels much more precise and does help with quicker gear changes.

I did order mine with the stainless knob after reading about the resonance issue before purchasing the kit. The noise does quiet down if I put downward pressure on the knob, so more weight may help. I'm going to start with some added sound deadening since that is the easiest and work from there.
 

·
Registered
Joined
·
224 Posts
Discussion Starter #10
Quick update, I realized I had extra memory foam pieces in the garage, so I cut it to size, placed it around the shifter under the boot and the sound is now tolerable. Still there, but not nearly as intrusive.
 

·
Registered
Joined
·
200 Posts
I have had my JPM shifter for 6 months. I was really surprised to read about the noise issue. Other than a different look and feel verses the stock shifter, my JPM performs just as well if not better and no noise. I too love mine and would never go back. I hope you can resolve the problem.

Don
 

·
Premium Member
Joined
·
2,212 Posts
I'm not sure how tight the fit is but I would have tried to sandwhich a piece of rubber ( make a gasket ) in between the 2 metals if I had that problem.
 

·
Registered
2009 Mysterious GXP Coupe #100
Joined
·
2,733 Posts
I'm not sure how tight the fit is but I would have tried to sandwhich a piece of rubber ( make a gasket ) in between the 2 metals if I had that problem.
What 2 metals? The issue is that the shifter isn't weighted nearly as much as the stock one, so it resonates (vibrates if you will)
 

·
Premium Member
Joined
·
2,212 Posts
Oh, sorry, I thought some of the vibration was coming from it not being solid against the shaft. Aluminum and steel. it slides over a stud and then a set screw holds it in place right? I wonder if you couldn't apply RTV in the shifter and then push it down on the shaft and then tighten the screw if that wouldn't help any. Now if the shifter ball was hollow or not 1 solid piece then I could see that rattling a bit.
 

·
Registered
Joined
·
224 Posts
Discussion Starter #15
So far the extra foam around the base is the best solution I have found. It still resonates, but is muffled slightly. I also discovered that my shift knob won't budge from the shaft. Trying to loosen the knob only spins the collar and removes the entire assembly.
 

·
Registered
Joined
·
7,173 Posts
So far the extra foam around the base is the best solution I have found. It still resonates, but is muffled slightly. I also discovered that my shift knob won't budge from the shaft. Trying to loosen the knob only spins the collar and removes the entire assembly.
The shaft is keyed to the gearshift stub and cannot turn. So if it is spinning, it's coming off (probably the collar too, but the shaft won't be).
 

·
Registered
Joined
·
224 Posts
Discussion Starter #17
My fault there, I didn't word that properly. The knob was threaded so tightly that if I wanted to only remove the knob the threaded shaft of the JPM piece and the collar came away as one piece, with knob still attached. I was able to hold the collar with a vice grip (protected of course) and twist the knob free. I was thinking of all these things earlier, but wasn't home, I now just had time to go out to the car and do this, plus I added mastic as per your suggestion.
 

·
Registered
Joined
·
224 Posts
Discussion Starter #18
Just to update, I tried every suggestion mentioned but the resonance still remains. It seemed better after insulating the area under the boot, but didn't last long. I contacted JPM for other suggestions and was told to try teflon tape on the threads of the shaft. I taped the entire threaded portion, but no change. They also offered to send a stainless knob, but I already have that. Looks like I will have to live with it.
 
1 - 20 of 22 Posts
Top