FULL THROTTLE 2nd gear grind LS3 / M6 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

JMAC2011 · 09-18-2010, 04:20 PM

My car now has 1,600 miles on it. Since the first day shifting from 1st to 2nd gear at full throttle has resulted in a grind while going into 2nd gear. If I slow the 1 to 2 shift down just a little bit it goes in fine. It am sure it has nothing to do with my timing. I don't have this problem going into or out of any other gear. The Hurst shifter seems smooth between all gears going up or down. It could be a synchronizer problem, a slave cylinder problem, etc... Ship shift doesn't seem to make any sense, but I haven't put a ship shift eliminator on the car yet. DOES anyone have any real experience with this that has resolved the problem? I did put in the Hurst shifter and I took my time to make sure everything was right.

SCCAracer01 · 09-19-2010, 11:15 AM

My 2011 SS is in getting 2nd gear and synchros replaced for the same problem. The dealer wants to try this first to see if it stops the grinding. Will update this coming week - hope it solves the issue.

JMAC2011 · 09-19-2010, 03:45 PM

So, today I took out the Hurst shifter and put back in the stock shifter. I was planning on taking it back to the dealership tomorrow. I tried about 6 full throttle 1st to second shifts with the factory and the problem seems to be gone. I didn't grind gears once. I shifted around 6000 to 6200. At this point I can't blame anything but the Hurst shifter. As I was taking out the Hurst I reread the directions and verified that I installed the Hurst correctly before removing it and putting the factory shifter back in. The good news is that now I can take the car to Atlanta Chassis Dyno for the headers and the camshaft tomorrow, as opposed to taking it to the dealership for problems. Lucky me! You better believe Hurst is going to get a call tomorrow!

trott · 09-21-2010, 08:39 AM

Quote:

Originally Posted by SCCAracer01

My 2011 SS is in getting 2nd gear and synchros replaced for the same problem. The dealer wants to try this first to see if it stops the grinding. Will update this coming week - hope it solves the issue.

Do you have the Hurst short throw shifter installed?

jamesc1123 · 09-22-2010, 09:01 PM

Talking to some transmission guys, grinding like that in the 1-2 shift is pretty common on a cold transmission (even more so on the TR-6060). Your problem might not be a poorly constructed shifter, but you just physically aren't quick enough without it to be fast enough to grind the gears. Food for thought.

Ghost-Rider · 09-23-2010, 01:52 PM

Sounds like you have synchro problem. How would any shifter lock out just one gear? Most likely you are shifting much quicker with the hurst shifter and the synchro is not working quick enough to match speeds. Additionally, you have less leverage with a short throw to mash it into gear as you would with the stock shifter. Maybe you should try the longer top stick on the hurst or stick with stock and get your second gear synchro fixed first.

05gofast · 09-24-2010, 06:28 AM

I've driven a couple like this before. Factory shifter = ok. Install the hurst & wot grind. More noticable from 1-2. My guess (just a guess at this point) is clutch isn't releasing quick enough by the time you're cramming gears with the short throw.

trott · 09-24-2010, 07:31 AM

I had my car at the dealer this week for this problem and was told that it was not normal driving conditions when it accrued so nothing could be done.

grizzly44 · 09-24-2010, 11:37 AM

I also agree there's a synchro failure pending. I assume it goes into gear but grinds during the shift. Mine was doing that on the 2-3 upshift. Still at the dealer with the trans in pieces. The short throw shifters will magnify any shortcomings in the trans. It's all about leverage. I've been reading all I can this week on grinding, seems to be a common problem, and not any gear in particular. I wonder if the Corvette guys are seeing this too.

Big Brunsy · 11-11-2010, 04:21 AM

Quote:

Originally Posted by trott

I had my car at the dealer this week for this problem and was told that it was not normal driving conditions when it accrued so nothing could be done.

How do they know what NORMAL driving conditions are for you?? What if normal for you is to only use 1st, 2nd, and 6th???

RonBennett · 11-11-2010, 05:30 AM

Interesting read, Ever since I installed the MGW Short Shifter I have had a grind from 1st to 2nd when getting on it hard.

Stingr69 · 11-11-2010, 05:42 AM

Either the synchro is not doing it's job and/or the clutch is not releasing the disk all the way. Combination of both can be working together. The 2nd gear synchro could be marginal and the clutch is not completely released so it shows up more when you are at high RPM and shifting fast to 2nd gear.

Flush out the clutch/brake fluid using the Ranger Protocol and see if that helps. Easy and cheap first.

If you have ever heated up the clutch too much, it would contribute to the problem of incomplete release and the gear grind.

Hope this helps,

-Mark.

bigrob301 · 03-21-2011, 09:56 AM

I to have the same problem with both stock and hurst shifter during high rpm shifts my solution for now is double clutching but there is definitely some 1-2 synchro problems

sask-man · 03-22-2011, 11:44 AM

Mine did the same thing and only 1 - 2 gear. Apparently there is a known but un- dealt with issue by GM to correct this. The synchros are not working right from first to second gear only, resulting in grinding and gear replacement as well.

I took it in and there wasn't a slightest of hesitation of them saying no problem we'll fix this under warranty.

I had this happen to mine about 4,000 miles in and I wasn't doing serious burnouts. Wrench at the delaership said mine was the 6th one he has done in the last two months!

09-18-2010, 04:20 PM	#1
JMAC2011 MONGOOSE Drives: 2011 SS Camaro M6 Join Date: Sep 2010 Location: Buford, GA Posts: 178	FULL THROTTLE 2nd gear grind LS3 / M6 My car now has 1,600 miles on it. Since the first day shifting from 1st to 2nd gear at full throttle has resulted in a grind while going into 2nd gear. If I slow the 1 to 2 shift down just a little bit it goes in fine. It am sure it has nothing to do with my timing. I don't have this problem going into or out of any other gear. The Hurst shifter seems smooth between all gears going up or down. It could be a synchronizer problem, a slave cylinder problem, etc... Ship shift doesn't seem to make any sense, but I haven't put a ship shift eliminator on the car yet. DOES anyone have any real experience with this that has resolved the problem? I did put in the Hurst shifter and I took my time to make sure everything was right.

09-19-2010, 11:15 AM	#2
SCCAracer01 2011 IBM 2SS/RS Drives: 2011 2SS/RS, Van Diemen Formula E Join Date: Jun 2010 Location: MO Posts: 24	My 2011 SS is in getting 2nd gear and synchros replaced for the same problem. The dealer wants to try this first to see if it stops the grinding. Will update this coming week - hope it solves the issue. __________________ 2011 IBM 2SS/RS: Silver Stripes, Midnight Silver wheels, Heritage grill, Borla ATAK cat. back, Eibach springs, Hurst short throw, MPD1 rear spoiler.

09-19-2010, 03:45 PM	#3
JMAC2011 MONGOOSE Drives: 2011 SS Camaro M6 Join Date: Sep 2010 Location: Buford, GA Posts: 178	The Hurst shifter was to blame!?! So, today I took out the Hurst shifter and put back in the stock shifter. I was planning on taking it back to the dealership tomorrow. I tried about 6 full throttle 1st to second shifts with the factory and the problem seems to be gone. I didn't grind gears once. I shifted around 6000 to 6200. At this point I can't blame anything but the Hurst shifter. As I was taking out the Hurst I reread the directions and verified that I installed the Hurst correctly before removing it and putting the factory shifter back in. The good news is that now I can take the car to Atlanta Chassis Dyno for the headers and the camshaft tomorrow, as opposed to taking it to the dealership for problems. Lucky me! You better believe Hurst is going to get a call tomorrow!

03-21-2011, 09:56 AM	#13
bigrob301 Drives: 2011 Camaro SS Join Date: Jan 2011 Location: Waldorf Posts: 12	sloppy shifting I to have the same problem with both stock and hurst shifter during high rpm shifts my solution for now is double clutching but there is definitely some 1-2 synchro problems

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09-22-2010, 09:01 PM	#5
jamesc1123 Drives: CGM 2SS RS w/ white stripes Join Date: Jul 2008 Location: Clarksville, TN Posts: 183 View My Garage	Talking to some transmission guys, grinding like that in the 1-2 shift is pretty common on a cold transmission (even more so on the TR-6060). Your problem might not be a poorly constructed shifter, but you just physically aren't quick enough without it to be fast enough to grind the gears. Food for thought.

09-23-2010, 01:52 PM	#6
Ghost-Rider Drives: SW 2SS/RS Join Date: Apr 2010 Location: Honolulu Posts: 73	Sounds like you have synchro problem. How would any shifter lock out just one gear? Most likely you are shifting much quicker with the hurst shifter and the synchro is not working quick enough to match speeds. Additionally, you have less leverage with a short throw to mash it into gear as you would with the stock shifter. Maybe you should try the longer top stick on the hurst or stick with stock and get your second gear synchro fixed first.

09-24-2010, 06:28 AM	#7
05gofast Drives: Something Fast Join Date: Feb 2010 Location: NC Posts: 32	I've driven a couple like this before. Factory shifter = ok. Install the hurst & wot grind. More noticable from 1-2. My guess (just a guess at this point) is clutch isn't releasing quick enough by the time you're cramming gears with the short throw.

09-24-2010, 07:31 AM	#8
trott Drives: 2010 2SS RS Camaro Join Date: Aug 2010 Location: SE.Michigan Posts: 78	I had my car at the dealer this week for this problem and was told that it was not normal driving conditions when it accrued so nothing could be done.

09-24-2010, 11:37 AM	#9
grizzly44 Drives: Victory Red 2SS LS3 Join Date: May 2009 Location: Maryland Posts: 7 View My Garage	I also agree there's a synchro failure pending. I assume it goes into gear but grinds during the shift. Mine was doing that on the 2-3 upshift. Still at the dealer with the trans in pieces. The short throw shifters will magnify any shortcomings in the trans. It's all about leverage. I've been reading all I can this week on grinding, seems to be a common problem, and not any gear in particular. I wonder if the Corvette guys are seeing this too.

11-11-2010, 05:30 AM	#11
RonBennett Drives: 2011 2SS/RS Join Date: Oct 2010 Location: Loudoun County, VA. Posts: 76	Interesting read, Ever since I installed the MGW Short Shifter I have had a grind from 1st to 2nd when getting on it hard.

11-11-2010, 05:42 AM	#12
Stingr69 '69 Owned Since '79 Drives: '69 Z/28 LeMans Blue w/White Join Date: Oct 2008 Location: LR AR Posts: 1,847 View My Garage	Either the synchro is not doing it's job and/or the clutch is not releasing the disk all the way. Combination of both can be working together. The 2nd gear synchro could be marginal and the clutch is not completely released so it shows up more when you are at high RPM and shifting fast to 2nd gear. Flush out the clutch/brake fluid using the Ranger Protocol and see if that helps. Easy and cheap first. If you have ever heated up the clutch too much, it would contribute to the problem of incomplete release and the gear grind. Hope this helps, -Mark.

03-22-2011, 11:44 AM	#14
sask-man Sask-man from Sask Drives: 2010 1SSRS M6 Black of course! Join Date: Aug 2009 Location: Saskatchewan Canada Posts: 312 View My Garage	Mine did the same thing and only 1 - 2 gear. Apparently there is a known but un- dealt with issue by GM to correct this. The synchros are not working right from first to second gear only, resulting in grinding and gear replacement as well. I took it in and there wasn't a slightest of hesitation of them saying no problem we'll fix this under warranty. I had this happen to mine about 4,000 miles in and I wasn't doing serious burnouts. Wrench at the delaership said mine was the 6th one he has done in the last two months!