1st gear grinding HELP
Thread Starter
Racer
Joined: Jun 2013
Posts: 374
Likes: 3
From: Kernersville NC
1st gear grinding HELP
Im sorry if this has been covered but ive googled the crap out of this but can't find anyone that's had this exact problem so here we go...
if the car is at idle and you push the clutch in and imidiatly try to go into first it will grind
If your at idle and push the clutch in for 5-10 seconds it will go into first just fine
It will go into all other gears just fine with both methods as above
If you try to gear down to first while rolling it will grind
It has never done this before. I did replace the transmission fluid with regular dextron III advance auto brand about 400 miles or so before this issue started
The car is a 2003 Z06
Twin dick clutch, C6 shifter, stock master and slave from what I can tell other than it has a remote bleeder. I did flush the clutch fluid until clear and it had no effect on this issue. I also did the shifter alignment procedure as well as put a stock c5 shifter back in and the problem still existed.
Would a Tick Master cylinder fix this issue or is it a synchro issue?
if the car is at idle and you push the clutch in and imidiatly try to go into first it will grind
If your at idle and push the clutch in for 5-10 seconds it will go into first just fine
It will go into all other gears just fine with both methods as above
If you try to gear down to first while rolling it will grind
It has never done this before. I did replace the transmission fluid with regular dextron III advance auto brand about 400 miles or so before this issue started
The car is a 2003 Z06
Twin dick clutch, C6 shifter, stock master and slave from what I can tell other than it has a remote bleeder. I did flush the clutch fluid until clear and it had no effect on this issue. I also did the shifter alignment procedure as well as put a stock c5 shifter back in and the problem still existed.
Would a Tick Master cylinder fix this issue or is it a synchro issue?
Last edited by gdmiller123; Oct 24, 2014 at 09:52 PM.
Drifting
Joined: Sep 2009
Posts: 1,719
Likes: 4
From: cinnaminson n.j.
St. Jude Donor '14
Sounds like your 1st gear synchro is bad. If you push down the clutch and immediately shift to 2,3,4,5, or 6th gear and it goes in with no problem, it's the synchro.
Does your car creep forward in gear with the clutch pedal depressed?
Does your car creep forward in gear with the clutch pedal depressed?
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
I agree..
Why are you down shifting into 1st????
Ive done it just to do it but, theres really NO reason to down shift into first. It really puts a load on that synchro when you do it.
Its there so you can smoothly get back into first at very low speeds.
Bill
Why are you down shifting into 1st????
Ive done it just to do it but, theres really NO reason to down shift into first. It really puts a load on that synchro when you do it.
Its there so you can smoothly get back into first at very low speeds.
Bill
Advanced
Joined: Oct 2014
Posts: 86
Likes: 1
From: Pinellas Park Florida
Im sorry if this has been covered but ive googled the crap out of this but can't find anyone that's had this exact problem so here we go...
if the car is at idle and you push the clutch in and imidiatly try to go into first it will grind
If your at idle and push the clutch in for 5-10 seconds it will go into first just fine
It will go into all other gears just fine with both methods as above
If you try to gear down to first while rolling it will grind
It has never done this before. I did replace the transmission fluid with regular dextron III advance auto brand about 400 miles or so before this issue started
The car is a 2003 Z06
Twin dick clutch, C6 shifter, stock master and slave from what I can tell other than it has a remote bleeder. I did flush the clutch fluid until clear and it had no effect on this issue. I also did the shifter alignment procedure as well as put a stock c5 shifter back in and the problem still existed.
Would a Tick Master cylinder fix this issue or is it a synchro issue?
if the car is at idle and you push the clutch in and imidiatly try to go into first it will grind
If your at idle and push the clutch in for 5-10 seconds it will go into first just fine
It will go into all other gears just fine with both methods as above
If you try to gear down to first while rolling it will grind
It has never done this before. I did replace the transmission fluid with regular dextron III advance auto brand about 400 miles or so before this issue started
The car is a 2003 Z06
Twin dick clutch, C6 shifter, stock master and slave from what I can tell other than it has a remote bleeder. I did flush the clutch fluid until clear and it had no effect on this issue. I also did the shifter alignment procedure as well as put a stock c5 shifter back in and the problem still existed.
Would a Tick Master cylinder fix this issue or is it a synchro issue?
Thread Starter
Racer
Joined: Jun 2013
Posts: 374
Likes: 3
From: Kernersville NC
I don't down shift into first like your thinking. More like if im pulling into a parking lot from a main road when i get to around 10mph ill go and put it in first in anticipation for the slower speeds with the clutch still in.
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
Thats EXACTLY what its designed for... You have a bad synchro cone.. Unfortunately,, that requires a complete tear down..
Melting Slicks
Joined: Jan 2007
Posts: 3,021
Likes: 133
From: Conejo Valley CA
Let us know how it turns out.
Safety Car
Joined: Dec 2011
Posts: 4,704
Likes: 239
From: Redondo Beach CA
That made me laugh, a big thumbs up smiley face, and ....... you need a a full rebuild.
I clicked in just to learn something, but couldn't resist that one.
I have the same tranny, so your road is mine, you are just further along. I am hoping to reach the 120, 000 mile service interval on the trans bearing replacement, but things are already requiring a little finesse on anything except take off.
In reading this post , I now think that some of my questions about wear have been quieted, thanks .
I clicked in just to learn something, but couldn't resist that one.
I have the same tranny, so your road is mine, you are just further along. I am hoping to reach the 120, 000 mile service interval on the trans bearing replacement, but things are already requiring a little finesse on anything except take off.
In reading this post , I now think that some of my questions about wear have been quieted, thanks .
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Thread Starter
Racer
Joined: Jun 2013
Posts: 374
Likes: 3
From: Kernersville NC
Ill likely leave it as is until it gets worse. Thankfully its first so its easy to drive around it.
Melting Slicks
Joined: Jan 2007
Posts: 3,021
Likes: 133
From: Conejo Valley CA
Yep... that's what I did. I don't know if this applies to your case but when this happened to me, I found if I first threw the shifter in the second gear position, I could then go into first without grind.