[Z06] Clutch/Trans Issues
Thread Starter
Instructor
Joined: May 2008
Posts: 238
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Clutch/Trans Issues
Hey all, hope you're enjoying the summer!
So yesterday I was doing some "spirited driving" and shifted from 2nd into 3rd at about 5k RPM. Right when I pushed towards third and heard a loud grinding sound (like when a shift is rejected). The shift was still successful and the car rode just fine in gear.
The problem started immediately after I went out of gear and tried shifting into third again. Now, every time I shift it makes a LOUD (LOUD LOUD LOUD) grinding noise. Once the car is in gear it drives fine.
The grinding doesn't happen at anything under 1.5k RPM. However, if I'm just sitting idle and press the clutch and shift into third right afterwards it'll still grind. If I'm idling and press the clutch in and wait about three seconds then shift into third it won't grind.
Soooo, here are my theories:
- Syncros are done.
- Shift fork pads shattered
- Shift fork bent
On top of this I also have the infamous "popping out of reverse with a violent vengeance" issue. It seems to me like I'm going to have to replace my clutch and trans.
I'd really love some input from the awesome people of corvette forums because I am a mere infant in car knowledge compared to you guys! Please help me!
I really would appreciate it!
So yesterday I was doing some "spirited driving" and shifted from 2nd into 3rd at about 5k RPM. Right when I pushed towards third and heard a loud grinding sound (like when a shift is rejected). The shift was still successful and the car rode just fine in gear.
The problem started immediately after I went out of gear and tried shifting into third again. Now, every time I shift it makes a LOUD (LOUD LOUD LOUD) grinding noise. Once the car is in gear it drives fine.
The grinding doesn't happen at anything under 1.5k RPM. However, if I'm just sitting idle and press the clutch and shift into third right afterwards it'll still grind. If I'm idling and press the clutch in and wait about three seconds then shift into third it won't grind.
Soooo, here are my theories:
- Syncros are done.
- Shift fork pads shattered
- Shift fork bent
On top of this I also have the infamous "popping out of reverse with a violent vengeance" issue. It seems to me like I'm going to have to replace my clutch and trans.
I'd really love some input from the awesome people of corvette forums because I am a mere infant in car knowledge compared to you guys! Please help me!
I really would appreciate it!
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
What year Z? Never mind, I just read your info. OK sounds like it's one of the things you've mentioned inside the trans. As you probably know, the '02s...me too, have tinfoil transmissions. If it makes it any easier, I don't think your clutch is failed.
Heard some bad noises, today myself. I've been sick since last Fri. and it's been perfect weather the whole time, so I thought I'd take my modded Z out for a ride. I blew up either the diff, or the trans, but my money's on the diff. Hit 4th gear hard, and, crunch. Got her flat bedded home by a great tow guy, and she's sitting in my garage, but I'm still too ill too jack up and see what I can. Good luck to you, too.
On second thought, it may be your torque tube bushings.
Heard some bad noises, today myself. I've been sick since last Fri. and it's been perfect weather the whole time, so I thought I'd take my modded Z out for a ride. I blew up either the diff, or the trans, but my money's on the diff. Hit 4th gear hard, and, crunch. Got her flat bedded home by a great tow guy, and she's sitting in my garage, but I'm still too ill too jack up and see what I can. Good luck to you, too.
On second thought, it may be your torque tube bushings.
Last edited by zeevette; Aug 3, 2011 at 07:44 PM.
Thread Starter
Instructor
Joined: May 2008
Posts: 238
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yea it is a 2002 Z06.
If it is the torque tube bushings then it would be much cheaper to fix right?
I'm getting ready to see the worst news and order a new trans (might as well get a C6Z clutch as well).
If it is the torque tube bushings then it would be much cheaper to fix right?
I'm getting ready to see the worst news and order a new trans (might as well get a C6Z clutch as well).
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
Yeah the TT bushings are a much easier, and cheaper repair, and fairly well known to be a problem. I didn't change mine when I put my new clutch in.....yeah, I know.....
Le Mans Master
Joined: Dec 2000
Posts: 5,245
Likes: 25
From: Blue Ridge Georgia
Well, I had the same problem but mine was 5th gear. I was lucky as I had just sold my 72 Camaro and had some extra cash. I changed flywheel, clutch, trans and TT couplings. Cost about 5 grand and everything is great now.
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Thread Starter
Instructor
Joined: May 2008
Posts: 238
Likes: 0
How come you needed a flywheel? Did you get one just to be safe?
Now I'm wondering if I might be able to get away with just rebuilding the trans or if that's just a waste of time.
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
Well, I know my diff. is dust, but I'm not sure about my transmission. Is there a test, like running through all the gears while stationary, that would give me a clue as to the condition of the tranny? Crap, Serephus, I didn't mean to hijack. Sorry.
Thread Starter
Instructor
Joined: May 2008
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Don't worry about hijacking zeevette, I don't mind lol. I can row through my gears just find while stationary.
Enigma (or anyone), do you know of a good place to buy synchros and/or other parts I may need for the drivetrain?
Enigma (or anyone), do you know of a good place to buy synchros and/or other parts I may need for the drivetrain?
Thread Starter
Instructor
Joined: May 2008
Posts: 238
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Rebuilding my trans is past my skills and resources unfortunatley. Although I'd still like to see that link you are talking about. I plan to buy the parts myself so I don't pay too much and just have the labor done by a trusted shop (which I also need to find, I'm thinking RET in Downey, CA).
Le Mans Master
Joined: Dec 2005
Posts: 8,588
Likes: 976
From: Communist Colorado
I would contact RPM Transmissions here on the forum. Send your tranny to them and either have it upgraded or get a level 4 or 5. Then bring the transmission to a shop for the swap.
Melting Slicks
Joined: Aug 2000
Posts: 2,618
Likes: 5
From: Overland Park KS
You don't even have 20k miles on it and you are basically stock... I don't see how anything could be worn with "typical" driving...
Any chance you have an aftermarket shifter? My guess would be your shifter has moved and is no longer aligned properly.
Did you miss a shift a some point?
Any chance you have an aftermarket shifter? My guess would be your shifter has moved and is no longer aligned properly.
Did you miss a shift a some point?
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
I don't think that shifter misalignment can cause the grinding sounds that Ser is having. Just as a old school test, you could try double clutching on shifts. Not very helpful, but could lead to syncro problems.
Racer
Joined: Jul 2008
Posts: 323
Likes: 7
From: Boston MA
mines at the dealer now with the same issue ( grinding going into 3rd and 4th) as soon as I hear whats wrong I will let you know. Double clutching helped me get into 3rd gear but it still wouldnt get into 4th 