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

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Old 07-21-2010, 04:09 PM   #1
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Tremec Missed 1-2 shifts, Notchy

Checking to see if anyone else is having this issue.. I noticed that I started misssing a few 1-2 shifts around the 1,000 mile mark, this only occurs during hard acceleration, not speed shifting, but very quick shifts. When it happens, it doesn't go in to second, and makes the terrible grinding noise I first attempted hard quick shifts around the 500 mile mark, and had no missed shifts until around the 1,000 mile mark.

Took it to the dealer, the tech couldn't duplicate, I was not with him.. When I picked it up, the tech didn't have time to ride with me, I did duplicate it for the service writer. It only missed one out of the three times I tried it with him in the car. I originally thought it was a synchro, and it still may be, but I do notice that the shifter is very notchy between 1-2.(tested sitting still, clutch in) It is butter smooth between 3-4, 5-6, but feels like it is catching on something between 1-2. I am starting to wonder if this is shifter related, instead of transmission?? You guys that have aftermarket shifters, does the 1-2 shift seem smooth?

I will say the first few times this happened, I thought I just f'd up the shift, but it seems to be happening more often now. Just for the record, I have owned many manual transmission sports cars, done a bit of SCCA racing in them etc., not my first rodeo.

I appreciate any insight on this.
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Old 07-21-2010, 06:47 PM   #2
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Here is the thread you are looking for (if V6 manual)
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Old 07-21-2010, 07:57 PM   #3
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Quote:
Originally Posted by bi11ymc View Post
That's the Aisin V6 6-speed thread. He's got a Tremec (SS).
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Old 07-21-2010, 08:23 PM   #4
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That's the Aisin V6 6-speed thread. He's got a Tremec (SS).
Thanks for the correction. I had the V6 manual with the same issue before I got my automatic.
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Old 07-21-2010, 09:00 PM   #5
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Quote:
Originally Posted by bi11ymc View Post
Thanks for the correction. I had the V6 manual with the same issue before I got my automatic.
You got the automatic, but looks like you also added a couple cylinders!
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Old 07-21-2010, 09:40 PM   #6
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If it's like my car, get used to it...

My dealers done nothing so far...it's in there again last chance for them so we'll see
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Old 07-21-2010, 10:00 PM   #7
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I have missed 2nd gear twice, both after 1k miles but mine was driver error..letting the clutch out before I was in 2nd.
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Old 07-22-2010, 12:53 PM   #8
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I definitely considered operator error, Sh&*T does happen! The prob I'm experiencing is much more regular to just be a goofed shift, again, I have a fair amount of experience with no similar issues.

Really thinking this is a Shifter issue, would appreciate any feedback on the aftermarket shifters, specifically the 1-2 shift feel. (Is it notchy, does it catch, etc)
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Old 08-09-2010, 03:39 PM   #9
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+1 on the 1st to 2nd notchy shifting. Yes, it has even grinded gears during spirited driving too. I took it to Connell Chevrolet in Costa Mesa and they said, "It's operating as designed". What a freakin' joke! That's is just pure laziness! Now it's at Selman Chevrolet in Orange. I hope they step up, thoroughly investigate and fix the problem. To me it feels like the clutch does not fully disengaging and has worn the synchros. What's strange is it's notchy whether I'm sitting in the driveway with the engine turned off or driving.

Here is a video of the notchy shifting:




Here is the pathetic worksheet from pathetic Connell Chevrolet:



You saw the video, right? So how can Connell Chevrolet be so oblivious?
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Old 08-10-2010, 08:27 AM   #10
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Same problem

I have/had the same problem with my car. I used to work at the dealer that mine is at. Mine started around same mileage. My first trip the tech was an asshole and printed me off a symptom list of manual transmissions. I kept driving it until it got worse. I went back and had service manager go for a ride. He had it act up on his first try. They are replacing a whole slew of parts in my tranny. They said it is definately not right. I am supposed to get the car back today. I will report my findings.
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Old 08-10-2010, 01:05 PM   #11
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Mine has gotten worse, took it back last Friday for another drive with the dealer, and they do agree something amiss..

It goes in tomorrow am, they want to start by doing an oil analysis.. pretty sure they will find plenty of metal. I'll report back once I know more.

Fyi, mine also has what sounds like a rattle in the throwout bearing, occurs when you load/unload the drivetrain via the clutch. I can duplicate it easily just rolling at a few mph, very noticeable rattle. I tend to think my transsmission issues may be clutch related, although I haven't had the sticking clutch some have reported.

In my original post I was wondering if the shifter it self might be the issue, replaced it with an MGW, didn't fix the problem. (really didn't think it would) The MGW is excellent, just as many have reported.
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Old 08-10-2010, 01:15 PM   #12
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I too find 1-2 the easiest to grind. Like others, at first I thought its a driver issue. Now I am starting to doubt its me and more of a problem...hopefully it does not get worse.
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Old 08-10-2010, 01:16 PM   #13
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My car did exactly the same as yours but only under WOT and only sometimes. I changed to the Barton shifter and it still does it. Let us know what they do and if it helps. Thanks,
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Old 08-10-2010, 01:40 PM   #14
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Mine is at Lone Star Chevrolet today and this is one of the many issues I am having with mine. It's so bad I want to go back to the GT500. That thing has a wonderful shifter... and this was before they included a short throw shifter stock.
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Old 08-10-2010, 11:45 PM   #15
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Mine is at Lone Star Chevrolet today and this is one of the many issues I am having with mine. It's so bad I want to go back to the GT500. That thing has a wonderful shifter... and this was before they included a short throw shifter stock.
I called the dealer today to check on the status of my car... the guy said they were ripping apart my transmission so we shall see what comes of it. I'm excited. Maybe they will replace the synchro's, gears, shifter, shit any of it will probably be better.
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Old 08-11-2010, 07:53 PM   #16
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Same problem here! I installed a Hurst shifter but same problem. I had the car in to the dealer before I installed the shifter and of course they said nothing is wrong. It's done it from day 1 and I have 6,000 miles on it now. I heard that using Mobil One synthetic ATF helps. Eager to see what they find with SuperFly03's car!
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Old 08-12-2010, 01:35 AM   #17
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Originally Posted by rcracer78 View Post
+1 on the 1st to 2nd notchy shifting. Yes, it has even grinded gears during spirited driving too. I took it to Connell Chevrolet in Costa Mesa and they said, "It's operating as designed". What a freakin' joke! That's is just pure laziness! Now it's at Selman Chevrolet in Orange. I hope they step up, thoroughly investigate and fix the problem. To me it feels like the clutch does not fully disengaging and has worn the synchros. What's strange is it's notchy whether I'm sitting in the driveway with the engine turned off or driving.
Sorry man I don't see what problem you are referring to...

I think you might be confusing the "notchy shifting" with the stiff detents in the tranny. There is actually supposed to be a positive engagement that you can feel when shifting into the gears. If you are encountering that same feeling while sitting in the driveways parked then I would be willing to bet that is what you are feeling. The syncros would have nothing to do with any stiff gear engagement while you were parked. However if you have a short throw it is only going to amplify that stiff gear engagement.

As for the grinding while spirited driving, I would be willing to bet that you are letting out the clutch just a hair too quick for the transmission to be fully engaged in gear which results in the grinding. An easy test is after you short shift it and you grind, if you push the clutch back in fully and you can put it into gear at that point it is not the syncros going bad (if they were going, they would go regardless of if you short shifted or not). Also remember on the 6060 there are 3 syncros on first and second and 2 on all of the other gears, so the odds of wearing the syncros are pretty small. Remember, that with this transmission if you are ripping gears and short shifting there is a very fine line between letting the clutch out too soon and missing the gear and getting the shift perfect, and it is very easy to confuse the two and blame the equipment. That is not to say there may be something wrong with your tranny, however when you push this engine and tranny hard it is not forgiving. You will either be spot on, or way off and the difference between the two is exceedingly small, and it will bark back at you to let you know you did something wrong.
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Old 08-12-2010, 02:39 AM   #18
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Good video. Your shifter doesn't remain straight

rcracer78:

Just saw your video.

Every time you release the shifter in neutral it does not come back to the straight vertical but remains tlited to the left.

Mine goes back to almost perfect vertical everytime I release it in neutral.

Could it be that the mechanism was not corectly set up in your car shifter??

Hope this helps you.

Good luck,

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Old 08-12-2010, 02:49 AM   #19
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Quote:
Originally Posted by rcracer78 View Post
+1 on the 1st to 2nd notchy shifting. Yes, it has even grinded gears during spirited driving too. I took it to Connell Chevrolet in Costa Mesa and they said, "It's operating as designed". What a freakin' joke! That's is just pure laziness! Now it's at Selman Chevrolet in Orange. I hope they step up, thoroughly investigate and fix the problem. To me it feels like the clutch does not fully disengaging and has worn the synchros. What's strange is it's notchy whether I'm sitting in the driveway with the engine turned off or driving.

Here is a video of the notchy shifting:




Here is the pathetic worksheet from pathetic Connell Chevrolet:



You saw the video, right? So how can Connell Chevrolet be so oblivious?
I had the same problem..It was never fixed.. Mine was clunky while driving as well as yours.. I didn't realize how bad it was until I test drove the new 2011 Mustang GT 5.0.. Smooth as butter..
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Old 08-12-2010, 03:10 AM   #20
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I get that grind mainly between 1st and 2nd on hard acceleration. It's really getting to me since I know if it's not fixed, I'll have tranny problems in the future.
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Old 08-12-2010, 07:31 AM   #21
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I get that grind mainly between 1st and 2nd on hard acceleration. It's really getting to me since I know if it's not fixed, I'll have tranny problems in the future.
Yeah, it was only from 1st to 2nd with mine too. Our vins were very close. What I thought it might have been was the gear itself, but I was no expert.
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Old 08-12-2010, 08:00 AM   #22
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I will be taking mine in tomorrow. I have driven manuals for 20+ years. I thought it must be me. When I try to accelerate hard, 2nd often will not let me engage. I have had to jump over to third many times. This is with the clutch all the way to the floor and foot away from the gas pedal. I have headers sitting in my garage and a KB supercharger on its way. I definitely want to get this taken care of before I install them.

Any member that gets this corrected, please let us know what the solution was.
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Old 08-12-2010, 08:07 AM   #23
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Could it be the mechanics/harware of the dreaded skipshift getting in the way... even when it is disengaged?

After all, it is designed to lock you out of 2nd.

btw ... mine does it too (#1691).

Makes me cringe
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Old 08-12-2010, 09:01 AM   #24
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Originally Posted by Beyond Limits View Post
Sorry man I don't see what problem you are referring to...

I think you might be confusing the "notchy shifting" with the stiff detents in the tranny. There is actually supposed to be a positive engagement that you can feel when shifting into the gears. If you are encountering that same feeling while sitting in the driveways parked then I would be willing to bet that is what you are feeling. The syncros would have nothing to do with any stiff gear engagement while you were parked. However if you have a short throw it is only going to amplify that stiff gear engagement.

As for the grinding while spirited driving, I would be willing to bet that you are letting out the clutch just a hair too quick for the transmission to be fully engaged in gear which results in the grinding. An easy test is after you short shift it and you grind, if you push the clutch back in fully and you can put it into gear at that point it is not the syncros going bad (if they were going, they would go regardless of if you short shifted or not). Also remember on the 6060 there are 3 syncros on first and second and 2 on all of the other gears, so the odds of wearing the syncros are pretty small. Remember, that with this transmission if you are ripping gears and short shifting there is a very fine line between letting the clutch out too soon and missing the gear and getting the shift perfect, and it is very easy to confuse the two and blame the equipment. That is not to say there may be something wrong with your tranny, however when you push this engine and tranny hard it is not forgiving. You will either be spot on, or way off and the difference between the two is exceedingly small, and it will bark back at you to let you know you did something wrong.
I have to disagree with you. There is something wrong with the Camaro SS's transmission/shifter. I am not entirely sure where the problem is (gears or shifter) but the GT500 that I had has the exact same transmission, Tremec 6060. It felt completely different. I never had to force it into gear, I never got stuck, I never grinded any gears except when I missed clutchless shifting (driver error). The feel of shifting was so much different on that car. It involved less effort, it never felt notchy, I never ground the gears because of a jacked clutch, or anything of the sort.

So I am hard pressed to say the OP is doing something wrong when I am getting the same result.
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Old 08-12-2010, 09:04 AM   #25
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Quote:
Originally Posted by Bell040 View Post
Could it be the mechanics/harware of the dreaded skipshift getting in the way... even when it is disengaged?

After all, it is designed to lock you out of 2nd.

btw ... mine does it too (#1691).

Makes me cringe
I've considered this. I would need to see how the lock out works to tell.

If it is true... then me and the Camaro are going to have long term problems.
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