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V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Driveshafts | Differentials | Gears | Rearends | Clutch | Shifters

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Old 09-18-2010, 05:20 PM   #1
JMAC2011
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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.
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Old 09-19-2010, 12:15 PM   #2
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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.
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Old 09-19-2010, 04:45 PM   #3
JMAC2011
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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!
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Old 09-21-2010, 09:39 AM   #4
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Quote:
Originally Posted by SCCAracer01 View Post
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?
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Old 09-22-2010, 10:01 PM   #5
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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.
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Old 09-23-2010, 02:52 PM   #6
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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.
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Old 09-24-2010, 07:28 AM   #7
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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.
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Old 09-24-2010, 08:31 AM   #8
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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.
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Old 09-24-2010, 12:37 PM   #9
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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.
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Old 11-11-2010, 05:21 AM   #10
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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???
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Old 11-11-2010, 06:30 AM   #11
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Interesting read, Ever since I installed the MGW Short Shifter I have had a grind from 1st to 2nd when getting on it hard.
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Old 11-11-2010, 06:42 AM   #12
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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,

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Old 03-21-2011, 10:56 AM   #13
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Unhappy 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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Old 03-22-2011, 12:44 PM   #14
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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!
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Old 03-22-2011, 01:07 PM   #15
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What exactly is the dealer doing to resolve the problem?

-Funk
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Old 03-24-2011, 04:54 PM   #16
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Dealer replaced the synchros as well as second gear that was shot because of the synchro failure. 100% warranty. Took a while to get parts in and they said to just keep driving it, since afterall the gear was already gone. Only bugged me when it would grind around people who would look at you like it was your first time driving!

Always shifted smooth if you were driving like your gramma, but who does that!
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Old 03-24-2011, 04:57 PM   #17
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I've seen this with the stock shifter and the Hurst. The problem is your transmission is cold. If I let temp get up to the 180 mark it's all good.

Gentlemen. These cars are like a Lady. You have to warm them up before you just slam it in them. They don't like it if they're not "warmed" up.
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Old 03-29-2011, 03:28 PM   #18
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Originally Posted by SSOOCH View Post
I've seen this with the stock shifter and the Hurst. The problem is your transmission is cold. If I let temp get up to the 180 mark it's all good.

Gentlemen. These cars are like a Lady. You have to warm them up before you just slam it in them. They don't like it if they're not "warmed" up.
Thanks for the info...I just started to recently experience this myself during spirited driving. I also have a short shifter installed.

And I do notice it only happens in the morning for me...cause I merge onto the highway within 3 to 4 minutes of regular driving from my home..and I tend to floor it at this point
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Old 03-29-2011, 03:57 PM   #19
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Quote:
Originally Posted by JMAC2011 View Post
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!
this is very interesting. i also have noticed a grind going into second after installing my hurst shifter. i was also planning on removing the hurst back to stock because i never had an issue when i was stock. i went to the drag strip 3 times with the stock shifter, and no problems. it has to be the hurst.
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Old 03-29-2011, 03:59 PM   #20
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Originally Posted by SSOOCH View Post
I've seen this with the stock shifter and the Hurst. The problem is your transmission is cold. If I let temp get up to the 180 mark it's all good.

Gentlemen. These cars are like a Lady. You have to warm them up before you just slam it in them. They don't like it if they're not "warmed" up.
seeing as how there are no problems with the stock shifter, i don't think that's the problem.
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Old 03-29-2011, 05:34 PM   #21
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Originally Posted by jamesc1123 View Post
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.
This.

Mine had the horrible grind with the stock shifter, but only when I speed shifted as fast as I could. With the MGW, it's every time I don't all-out granny shift. The 2nd gear assembly, specifically the bronze sintered blocking rings is definitely the culprit. Several members have had these parts replaced with the compressed carbon rings and report their tranny now shifts like butter. With a short-throw, every dollar-saving fault in the TR6060 is put on display.
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Old 03-29-2011, 06:55 PM   #22
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Well said and right on the mark!
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Old 03-29-2011, 07:00 PM   #23
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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.


Take it to another dealer.
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Old 03-29-2011, 07:52 PM   #24
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This.

Mine had the horrible grind with the stock shifter, but only when I speed shifted as fast as I could. With the MGW, it's every time I don't all-out granny shift. The 2nd gear assembly, specifically the bronze sintered blocking rings is definitely the culprit. Several members have had these parts replaced with the compressed carbon rings and report their tranny now shifts like butter. With a short-throw, every dollar-saving fault in the TR6060 is put on display.
Again, I'm pretty sure this isn't the case for the OP, nor i. We never had problems with the stock shifter, in any gear, power shifting or not. Then, the hurst goes in, and we have problems with the 1-2 shift, but no other gear shift. I didn't know what was the problem, the synchros, hurst, etc? Now that he put the stock shifter back in, and has no problems, I'm 95% sure it's a problem with the hurst. I'll be 100% sure once I put my stock back in.

And if I don't have any problems with my stock shifter, I hope hurst does something about it.
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Old 03-29-2011, 08:17 PM   #25
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Again, I'm pretty sure this isn't the case for the OP, nor i. We never had problems with the stock shifter, in any gear, power shifting or not. Then, the hurst goes in, and we have problems with the 1-2 shift, but no other gear shift. I didn't know what was the problem, the synchros, hurst, etc? Now that he put the stock shifter back in, and has no problems, I'm 95% sure it's a problem with the hurst. I'll be 100% sure once I put my stock back in.

And if I don't have any problems with my stock shifter, I hope hurst does something about it.
The only way Hurst can fix it is if they put out a "normal throw" shifter...

Plus, the Hurst only replaces the center shaft, not the whole shifter body like the MGW, so how could that alone cause the transmission to grind without an underlying fault in the transmission itself? And if that were possible, why is the same problem occurring with other brands of shifters and why is only the 2nd gear grinding instead of all of them?
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