Had my JWT flywheel for a while now and it's great. However, it seems that there is now increased vibration in the shifter at high rpms than there used to be with the stock flywheel. Does this seem normal?

Also, in 5th gear at mid to high rpms there is an odd rattling sound. Seems localized more inside the car than down by the flywheel, though. I'm thinking it might be the metal shifter plate down beneath the boot. It has 4 bolts we had to under when removing the tranny, and perhaps they are coming loose with the increased vibration.

I'm also getting a ton of that gravel-in-the-tranny sound at low rpms, mainly below 2k. I know this is common from what folks around here say, but it sure is noticable outside the car. I can barely hear it inside with the windows closed, but it's quite loud outside. I would have sworn that folks were saying it wasn't so loud outside the car, and mainly audible inside. I'm definitely getting the opposite.

Just wanted to see what you fellow JWT flywheel owners are experiencing.

 

I have had mine for 3 weeks -

Gravel sound below 2300 RPM with engine load and on slow starts out of 1st

Slight roar somewhere between 2000-3000 rpm when coasting with car in gear and clutch out (basically just off throttle).

I did not remove the shifter to install, so mine has no possible rattles there. Instead I unbolted the linkage and the frame from below.

 

yea the gravel sound sucks. its exactly what a bad input shaft bearing sounds like... but it wouldnt make sense for everyone to have bad input shaft bearings so i wonder wtf that sound is.

 

 

Thanks for the replies, everyone. I did of course expect the gravel sound (since everyone talks about it so much), but I didn't really expect it to be quite so loud outside the car. I can accept it as long as it's normal. And just as hfm said up above, if I depress the clutch the sound goes away.

The gravel sound wasn't really my concern as much as the increased vibration, though. I was concerned that maybe we didn't quite get things perfectly centered during the install (pressure plate and flywheel) since I didn't have the little alignment pins, and that maybe that was causing the increased vibration. But, if everyone seems to be experiencing that increase, then I can accept that too.

 

I've had shifter vibabration specifically in 5th gear before.
If the guide plate is too snug agains the shifter shaft's "nub" it can chatter.

I simply add a little air gap between the plate and "nub" and the audible rattle no longer occurs. I noticed it more after I added the rouge shifter.

 

wow nowI have no idea what to expect when i get my Tilton setup installed next week.....LOL I bet its gonna be loud....maybe the rouge short shifter i ordered today will help with the vibrations...we shall see....

 

Not to dis the Rouge shifter , since I love mine, but if anything, the short shifter may magnify the flywheel noise inside the cabin.

With the shorter lever into the back of the trans, small motions in the trans are magnified onto the top-side (were the **** is).

 

Where's the guide plate? Is it easy to get to?

I heard that some with having troubles with shifting just adjusted guide plate and probs when away.

Thanx.

 

The rouge shifter actually has less vibration...I installed yesterday... I love it...just takes a little more effort to shift...but alot smother...

 

I's the three bolt plate directly below the shifter boots(2 of them). The guide plate a) holds the plastic ball socket in pace and
b) provides the reverse gate(press-down action). The "nub" is on the shifter shft. In general the nub shoudl "contact" the falt side of the guide plate when in 5th and 6th. However; if touching it can conduct vibration and cuase the shifter to rattle in certain cirmumstances. I found that by opening this gap by ~.125" I can elimiinate 5th and (less so (6th) rattling. The downside is that the slide into 5th may be a little notchy.

 

Based on geometry I would've thought a shorter shifter shaft would result in less vibrations than a long shaft. The longer the shaft, the more exaggerated the movements become at the end. Same principle applies to making the shifter throw shorter. Shorten the shaft, and you don't have to move the shifter as much to accomplish the shift.

On that note, does this Rogue shifter use a different shift ****? A heavy shift **** will help reduce vibrations compared to a light shift ****. I've read from many people who've installed lightweight ***** and didn't like the increased vibrations felt afterwards.

 

Keep us updated on this. I'd love to here your thoughts on the vibrations and noise.

 

Now im under serious debate........ Rogue takes more effort to shift well I never used to miss shift now I do.....when Im at redline and I go from 2nd to 3rd sometimes I dont fully engage....I dont grind any gears I guess maybe im just not used to the amount of effort required to shift now.....I have to throw hard into 3rd gear...it just sucks sometimes.....Maybe with more practice it will be benneficial but well have to see...

Another thing it could be is that now I have a NISMO shift ****...... I installed both at the same time.... I was under the impression that the shift **** would help too......

Errrrrrrrrrrrrrr........... What to do????

 

I can't really see how a heavier or lighter shift **** would change shifting effort. There's just not enough weight there to make any difference.

The shorter shaft, though, would definitely make it harder. A shorter shaft has less mechanical lever advantage. The Z has a pretty notchy, rough tranny in the first place, so a short shifter is only going to make it worse. Personally, I'd just stick with the stock shifter. I've never understood the need for a shorter shifter on the Z.

 

It's not really the "short throw" aspect of the Rougue SS that is the big improment , it is the accuracy of the Gateing. The OEM shifter is not very precise and kind of " sqirmy". The Rouge feel like a toggle switch , no fuzz about it being in or out of gear.

 

A heavier shifter does affect shifting effort. They even make heavier shifters for that reason. The weight of the shifter affects the center of gravity.

 

the stock flywheel is a dual mass that has springs and a big rubber damper in it... removing that damper creates that sound... it is a common known and accepted sound in the high performance world when light weight flywheels are used...

 

Yeah, I knew the gravel sound would be there, but I just misunderstood what people had been saying prior to when I bought mine. I had mistakenly thought that people were saying the sound wasn't too audible outside the car, and was mostly audible inside. My experience has been just the opposite. Inside the car with the windows up, I can't hear the gravel sound at all. Outside the car, though, my car sounds like a cement truck.

Also, while idling, if I engage the clutch pedal the sound goes away. The sound only occurs when I release the clutch pedal. From what I read above, this is also normal.