Shifting ill's
Thread Starter
Burning Brakes
Joined: Jan 2004
Posts: 1,243
Likes: 6
From: Rowlett Texas
Shifting ill's
I managed to whack my 6 spd transmission not too long ago and had it rebuilt at a reputable, well known Corvette tuner. After several arrempts I finally accepted it but now have some regrets. It just will not go into 5th gear without a fight. Now thinking perhaps a new transmission is the only answer, BUT, I'm wondering if the whole problem may be external to the transmission. I'm not real familiar with how it all works, but is there rods that run from the shifter back to the transmission? Could a bent rod affect just 5th gear while not affecting any other shift? The originaldamage was the 5th gear slider.
Thanks for any advice or help.
Thanks for any advice or help.
Tech Contributor
Joined: Jan 2007
Posts: 19,388
Likes: 1,134
From: Dyer, IN
I managed to whack my 6 spd transmission not too long ago and had it rebuilt at a reputable, well known Corvette tuner. After several arrempts I finally accepted it but now have some regrets. It just will not go into 5th gear without a fight. Now thinking perhaps a new transmission is the only answer, BUT, I'm wondering if the whole problem may be external to the transmission. I'm not real familiar with how it all works, but is there rods that run from the shifter back to the transmission? Could a bent rod affect just 5th gear while not affecting any other shift? The originaldamage was the 5th gear slider.
Thanks for any advice or help.
Thanks for any advice or help.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
C
The C5 & C6 transmission is shifted via a single shift rod that runs from the shifter box thru the torque tube and to the shift rod input to the rear mounted transmission. ALL the shift gates and shifter return springs are INSIDE the transmission.
Inside the shift box is single ROD with a hole in the center of the rod. The shifter stick moves that rod FORWARD & REVERSE AND ROTATES IT SIDE TO SIDE.
There is a shifter alignment procedure in the service manual. You also need to inspect the rubber bushings that isolate the shift box from the torque tube. They deteriorate and can caues shifting issues. Sad part, GM does not sell them seperately. Theres a guy on the C6 forum who makes a suitable replacement.
What shifter do you have????? STOCK or Aftermarket
I will send you some picts of this stuff later tonight:
BC
The C5 & C6 transmission is shifted via a single shift rod that runs from the shifter box thru the torque tube and to the shift rod input to the rear mounted transmission. ALL the shift gates and shifter return springs are INSIDE the transmission.
Inside the shift box is single ROD with a hole in the center of the rod. The shifter stick moves that rod FORWARD & REVERSE AND ROTATES IT SIDE TO SIDE.
There is a shifter alignment procedure in the service manual. You also need to inspect the rubber bushings that isolate the shift box from the torque tube. They deteriorate and can caues shifting issues. Sad part, GM does not sell them seperately. Theres a guy on the C6 forum who makes a suitable replacement.
What shifter do you have????? STOCK or Aftermarket
I will send you some picts of this stuff later tonight:
BC
Thread Starter
Burning Brakes
Joined: Jan 2004
Posts: 1,243
Likes: 6
From: Rowlett Texas
Well, they sent me out the door knowing that it had a problem and I conceded that they couldn't fix it. The comment was 'there's nothing more we can do except get a RPM transmission'. I already had quite a bit of money into it so I was hopeful (how dumb) that I would just learn to finesse it into 5th gear, and I could for a while, but now it's getting harder to live with. That's when I started thinking that it may be a linkage problem more than a transmission problem.
Tech Contributor
Joined: Jan 2007
Posts: 19,388
Likes: 1,134
From: Dyer, IN
Well, they sent me out the door knowing that it had a problem and I conceded that they couldn't fix it. The comment was 'there's nothing more we can do except get a RPM transmission'. I already had quite a bit of money into it so I was hopeful (how dumb) that I would just learn to finesse it into 5th gear, and I could for a while, but now it's getting harder to live with. That's when I started thinking that it may be a linkage problem more than a transmission problem.
I guess you should also clarify what it means to "whack" the transmission...
Thread Starter
Burning Brakes
Joined: Jan 2004
Posts: 1,243
Likes: 6
From: Rowlett Texas
Ok, there is only a single rod, from the shifter to the tranny. If the shop acknowledged they could not fix the trans, why do you think it's a problem with the rod. What EXACTLY was wrong, that was beyond repair, by a competent shop. I'm confused...
I guess you should also clarify what it means to "whack" the transmission...
I guess you should also clarify what it means to "whack" the transmission...
Tech Contributor
Joined: Jan 2007
Posts: 19,388
Likes: 1,134
From: Dyer, IN
You are undoubtedly aware of the clutch problems of the C5. I was at the track and when I came off the line, the clutch pedal would not return. I stopped the car and put it in neutral, then re-engaged the stuck clutch to find a gear so that I could clear the track. I believe that stabbing the shift lever from gear to gear trying to get into any gear did (a) knock down three teeth on the big end of the slider, and (b) possibly bend the shift rod. If they indeed replaced the gear, which I have no reason to doubt, and it still don't work right, could the rod be bent?
You have not answered the most important question: What EXACTLY was wrong, that was beyond repair, by a competent shop. Why was replacement the only option presented?
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Thread Starter
Burning Brakes
Joined: Jan 2004
Posts: 1,243
Likes: 6
From: Rowlett Texas
To answer your question. Is it possible that the rod is bent, yes....is it probable....no. Additionally, for the rod to be bent, and only affect 5 gear is a stretch. Again, you originally had a problem with 5th gear only, and you still have a problem with 5th gear ONLY.
You have not answered the most important question: What EXACTLY was wrong, that was beyond repair, by a competent shop. Why was replacement the only option presented?
You have not answered the most important question: What EXACTLY was wrong, that was beyond repair, by a competent shop. Why was replacement the only option presented?
Tech Contributor
Joined: Jan 2007
Posts: 19,388
Likes: 1,134
From: Dyer, IN
I don't have an answer for that, Lucky. The problem with the transmission was that it would grind badly going into 5th. After several attempts by the techs, it would go into 5th with some very light-fingered ****ing technique. It seems harder now than when I first retrieved the car from the shop.
Thread Starter
Burning Brakes
Joined: Jan 2004
Posts: 1,243
Likes: 6
From: Rowlett Texas
It's kind of hard to help, without that info. When the only suggestion is "buy an RPM transmission", it makes me wonder. Did they just not want to fix it.? were not capable of fixing it?.....or just wanted to sell you a transmission? Sounds like you need to get it to a trusted shop. Who did the work?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
"their reputation is extremely good" It CANT be that good cause they sure dissed you!
For someone whos suppose to have that good of a reputation, they should have been all over your issue. Its a mechanical gear box. If they cant disassemble it and figure ot what is not functioning properly, I SURE dont want them working on my stuff!!!!If it were me, I would tell them to FIX IT or pay the price.
Sorry for the rant but I hate business that do people wrong like that!
Here are the pictures I promisse you:
Alignment Pin inserted :
Stock Shifter and a KIBAN:
Inside the Box:
The top shaft on the tranny is the shift rod attachment point:
Racer
Joined: Feb 2004
Posts: 348
Likes: 6
From: Las vegas Nevada
shifter alignment procedure
Hi Bill, I have a Manual on DVD but it's not happy at this time. Can you post the shifter alignment procedure?
Thanks
Thanks
C
The C5 & C6 transmission is shifted via a single shift rod that runs from the shifter box thru the torque tube and to the shift rod input to the rear mounted transmission. ALL the shift gates and shifter return springs are INSIDE the transmission.
Inside the shift box is single ROD with a hole in the center of the rod. The shifter stick moves that rod FORWARD & REVERSE AND ROTATES IT SIDE TO SIDE.
There is a shifter alignment procedure in the service manual. You also need to inspect the rubber bushings that isolate the shift box from the torque tube. They deteriorate and can caues shifting issues. Sad part, GM does not sell them seperately. Theres a guy on the C6 forum who makes a suitable replacement.
What shifter do you have????? STOCK or Aftermarket
I will send you some picts of this stuff later tonight:
BC
The C5 & C6 transmission is shifted via a single shift rod that runs from the shifter box thru the torque tube and to the shift rod input to the rear mounted transmission. ALL the shift gates and shifter return springs are INSIDE the transmission.
Inside the shift box is single ROD with a hole in the center of the rod. The shifter stick moves that rod FORWARD & REVERSE AND ROTATES IT SIDE TO SIDE.
There is a shifter alignment procedure in the service manual. You also need to inspect the rubber bushings that isolate the shift box from the torque tube. They deteriorate and can caues shifting issues. Sad part, GM does not sell them seperately. Theres a guy on the C6 forum who makes a suitable replacement.
What shifter do you have????? STOCK or Aftermarket
I will send you some picts of this stuff later tonight:
BC
Tech Contributor
Joined: Jan 2004
Posts: 20,030
Likes: 289
From: Wylie TX --> Less is More, except under the hood !
Robert:
I knew I had seen this somewhere before.
http://rpmtransmissions.com/files/c5...adjustment.pdf
Hope you get it figured out !
Toque
I knew I had seen this somewhere before.
http://rpmtransmissions.com/files/c5...adjustment.pdf
Hope you get it figured out !
Toque
Thread Starter
Burning Brakes
Joined: Jan 2004
Posts: 1,243
Likes: 6
From: Rowlett Texas
Robert:
I knew I had seen this somewhere before.
http://rpmtransmissions.com/files/c5...adjustment.pdf
Hope you get it figured out !
Toque
I knew I had seen this somewhere before.
http://rpmtransmissions.com/files/c5...adjustment.pdf
Hope you get it figured out !
Toque
Melting Slicks
Joined: Feb 2003
Posts: 2,966
Likes: 22
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11
I'll give you my $0.02 since I build these on a regular bases. If you ONLY had an issue grinding going into 5th gear, it would have been most likely the broken plastic fork pads. Also, if the 5th gear grinded for a while, the corresponding synchronizer (5-6 synchro) has to be replaced also since they interlock. If you have the invoice, see if the 5th gear and 5-6 synchro was replaced. If not, that is the culprit.
I have NEVER seen a bent rod by the way.
I have NEVER seen a bent rod by the way.
