Loud Clutch Clunk Noise When Engaged/Disengaged Under Load (Video)
2001 Wrangler 4.0L, Original Clutch
When I depress the clutch pedal under load, the midsection (somewhere in the trans, transfer case, clutch assembly) makes a jarring clunking noise. I get the noise when I engage or disengage the clutch typically in first through second gears. But if I shift gently and match RPMs the noise is gone or is diminished greatly.
I have checked all the U Joints, they are fine. All front end components are tight and in good order. Every bolt under my jeep is torqued to spec. Ive pulled both front and rear drive shafts and eliminated the possibility of slack in the axle setup. And yes the trans mount is perfect.
All I can do is narrow it down to the transmission, clutch or transfer case. I definitely hear it coming from under the jeep, center body. Any ideas? Maybe the throw out bearing?
I would venture to say it's the t-case linkage hitting the body.
I have that problem too but that noise is more of a light taping sound and I can make it go away if I hold the 4x4 shift lever. The mystery noise is a loud metal clunk. See the link I posted, that's exactly what it sounds like.
I can re-produce it at will by slowly easing the clutch out at idle(no gas) and just as the clutch is almost fully engaged, depress the clutch pedal quickly. The Clank...clink clink is more pronounced if on a slight incline. If I depress the clutch pedal slowly...no clank.
FWIW...I had the service manager at my dealership take a listen and his response was that it is a normal sound produced by rapidly unloading the transmission while under torque.
Not sure if I buy "normal" or not, but it sure seems like a common condition from reading JF posts on the topic.
03 5 spd Black TJ Rubicon, Stock for now
i have the same crap with my 00tj 39somethinthousand miles. it was fine before it got rebuilt, now it grinds every gear, it "thumps" if i dont let the clutch out smooth enough, and it makes a grinding noise until i push in the clutch. thinking about swaping a nv4500 or ax-15. i found it crazy that jp magazine said the nv3550 was one of the best manuals jeep ever used but they suck!
Hey Guys, not sure if anyone figred this one out, but I found this from another thread:
"The reason I feel a clunk when I press down on the clutch pedal and rapidly engage it again is because the mainshaft is no longer spinning, and when the clutch is rapidly engaged, well it clunks a little because the mainshaft has to go to 700+ RPM from 0 RPM. If I go from neutral > clutch disengaged > quick shift into 1st and clutch engaged > accelerate, the mainshaft doesn't have time to spin down".
Has any progress been made on a cause for this thread?
[LEFT][URL="http://www.jeepforum.com/forum/f123/"]Colorado Jeep Club Meber #205[/URL][/LEFT]
Yeah mine does it too, I just don't worry about it too much and figure it's just unloading the transmission load a little too fast. Just a quick couple of clanging metal noises. Never seemed to hurt anything...
2003 Chevy 2500HD | 6.0 w/ 4.10s | Keys | H2 Wheels/315 BFG's
98 TJ SE | 3.75" Rough Country | 33x12.5x15 DC Mud Country | Cobra 19DX/Firestik 4' | IPF X4 | Genright Steering Box Skid - SOLD ΦΚΣ My Build
can't view the video anymore but I know exactly what your talking about. It worried me at first but I was told that this is normal for Jeep Wrangler TJ manual transmissions. Also, I have the NSG370 6 Speed transmission so I guess its common on that transmission in addition to the NV3550 5 Speed.