Clutch grind in 1st
Thread Starter
Racer
Joined: Oct 2011
Posts: 440
Likes: 0
From: Mukwonago Wi
Clutch grind in 1st
I did a search and after page 8 I could not find what I was looking for.
This happened to me twice today in 2 different parking lots. I was in first gear letting the clutch out and I got a quick grind. It stopped when the clutch pedal was completeely out. It was not like a gear grind either. It sounded like the clutch grinding as it engaged. The clutch has about 17k miles on it.
Any ideas?
This happened to me twice today in 2 different parking lots. I was in first gear letting the clutch out and I got a quick grind. It stopped when the clutch pedal was completeely out. It was not like a gear grind either. It sounded like the clutch grinding as it engaged. The clutch has about 17k miles on it.
Any ideas?
Safety Car
Joined: May 2007
Posts: 4,812
Likes: 46
From: Taylorsville North Carolina
If it is grinding just starting in first or reverse, it is probably pilot bearing. Only a $8 part, but a lot of labor to get to it. I hope it is something else, but sounds like pilot bearing to me. Good luck with it.
Advanced
Joined: Jul 2006
Posts: 76
Likes: 1
From: Roseville CA
Grinding sound in first
I was at Laguna Seca a couple weeks back, during one of the sessions, I was getting a vibration on left turns, then I started hearing a grinding sound only when starting out in first, with no sound with the clutch pedal pushed in. A couple other corvette experts listened and thought it sounded like the throwout bearing, but after I spent 6 hours disassembling, I discovered the pilot bearing was dust (literally) and the input shaft of the torque tube was scored. Wow, it happened very fast, never heard it before that day. I road race one day a month, for about the last 5 or 6 years. What a huge project! I had to use a modified harbor freight pilot bearing puller to get mine out, since there was only the outer race of the bearing remaining. It's forcing me to do some preventative maintanence and I'm also replacing the rubber couplings, since I have to assume those were shot, causing the torque tube to wobble. Or, the other possible cause was the pilot bearing was put in backwards or somehow there was no grease in the pilot bearing.
Thread Starter
Racer
Joined: Oct 2011
Posts: 440
Likes: 0
From: Mukwonago Wi
Did yours always do it? Or just randomly? I have noticed that mine will only do it sometimes and only when the clutch is warm. It never does it after the car has been parked.
Did yours sound like this? I made a short video.
http://www.youtube.com/watch?v=8XRqe...ature=youtu.be
Did yours sound like this? I made a short video.
http://www.youtube.com/watch?v=8XRqe...ature=youtu.be
Last edited by rttmike; Jun 15, 2012 at 09:24 AM.
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Thread Starter
Racer
Joined: Oct 2011
Posts: 440
Likes: 0
From: Mukwonago Wi
Heel & Toe
Joined: Sep 2011
Posts: 22
Likes: 0
From: Spearfish, SD
Still Going
I was concerned about this for a while, but the Textralia clutch could be the issue(6-puck), the car runs fine, except for the ocassional noise on slow engagement. When I take off quickly under strong acceleration the clutch doesn't sound off at all...could be some glazing, but I am not sure, I'll just keep driving. I have a remote bleeder, and changing out the fluid made no difference in the sound.
Instructor
Joined: Nov 2014
Posts: 118
Likes: 0
From: Bonney lake Wa
mine seems to be doing the same thing. almost like a grinding noise coming from the front of the car when in 1st and reverse. it just started this last weekend but the car was sitting for the last 5 years before that
Instructor
Joined: Oct 2013
Posts: 161
Likes: 7
From: Jacksonville,nc and Williamsburg,va North Carolina and virginia
Mine had been doing this for a few months but I figured out if you are easy on getting the car moving (under 1k rpm) mine wouldn't make the noise, but this past weekend I replaced the slave and pilot bearing now I have no noise what so ever. By the way the pilot bearing was completely trashed.
Drifting
Joined: Mar 2010
Posts: 1,628
Likes: 15
From: Seattle WA
I fourth (fifth? sixth?) the motion of the pilot bearing being at fault. Sounds exactly like what mine was doing, shop pulled the driveline and found a trashed pilot bearing and scored torque tube input shaft.
Racer
Joined: Apr 2014
Posts: 345
Likes: 23
From: los angeles California
What will you replace
If it's the bearing. Are you going to replace the clutch? Which one? The slave? Stock or aftermarket? Might as well change everything. Labor cost sucks. Im going through the same motion. Just waiting to see what parts I should upgrade to. Its going to cost. But hopefully last more than the previous installment. By the way. I have the ls7 clutch. But I think my problems lay with the slave or the bearing. Who knows.
Instructor
Joined: Nov 2014
Posts: 118
Likes: 0
From: Bonney lake Wa
I was looking at doing it myself. I found a pretty good write up on it.
http://www.smokinvette.com/corvette/...a-c5-corvette/
IM guessing your going to be 2.5k+ for a shop to do it for you. If you did it your self 500-900 depending if you go stock or aftermarket
http://monsterclutches.com/c5-corvet...12-inch-clutch
http://www.smokinvette.com/corvette/...a-c5-corvette/
IM guessing your going to be 2.5k+ for a shop to do it for you. If you did it your self 500-900 depending if you go stock or aftermarket
http://monsterclutches.com/c5-corvet...12-inch-clutch
Instructor
Joined: Oct 2013
Posts: 161
Likes: 7
From: Jacksonville,nc and Williamsburg,va North Carolina and virginia
I did mine myself and it wasn't too hard, first time was on a lift which made it a breeze and the second was on jack stand which since I already had been in there once I knew what all had to be done, but while I was in there I went ahead and replaced everything for good measure and not wanting to do it all over again. Hope that helps.