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

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Old 01-06-2011, 12:48 PM   #51
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Quote:
Originally Posted by RipperFox View Post
I have been having the same issues as all of you.

1. Grinds 1st to 2nd at higher RPM's
2. Tried a new shifter (Hurst), got no better, maybe worse. Probably cause it shifts even faster.
3. Change the fluild to Mobile Syn. No improvement.
4. Noticed that is happens alot more when tranny temp is colder. Above 75-80F, nearly goes away.
5. I can get it to do in the garage too.

In the garage, I notice that if I go from neutral ALMOST into 1st. (just to the point of resistance) and hold it there. Then pull back into second really quick it will grind. No clutch involved at all. Pedal to the floor, car at idle.
Now, let me say that again. I get the exact same grind, from 1st to 2nd, if I push the clutch tothe floor, just nearly push it into 1st, hold or a couple of seconds, and pull back into 2nd (as if speed shifting), and it will grind. Car is at 500-700 RPM the whole time, clutch is on the floor, the whole time. Give it a little gas (say 2-3K RPM) and it will grind like speed shifting at 6K.

Someone else try this and see what results you get. PM me or post here.

This is why I know it is the syncro's: RPM, clutch are not involved in this test. Syncro's are not match gear speeds quick enough for these gears. That is why slowing down your shift fixes the situation. I do believe that the tappered syncro's could be the cure for this.

I think what is happening in the garage is: The syncro's are matching speed to first gear (just at the edge of the entry gate), and when you are pulling into 2nd really quick, there is not enough time for the 2nd gear syncro to make gear speed.

The temperature thing: The viscosity of the tranny fluild is lower thus allowing the bearings and thus the gears to react faster.
Are you saying you have the engine running, clutch pedal to the floor and shifting from 1st to 2nd WHILE you have the clutch pedal to the floor and it grinds? While the vehicle is stationary? If this is what you're stating, then it's your clutch and not the transmission. When you have the clutch pedal to the floor, the input shaft of the transmission should be stopped (unless the clutch is dragging) so all the internal parts of the transmission should NOT be turning. If you hear it grinding that mean the internal parts are STILL moving.
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Old 01-09-2011, 07:33 AM   #52
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I have the 1st-2nd shift problem. I took to the dealer, they said shift slower. I called customer service, they told me to shift slower. I called Tremec they said that was GM blowing smoke. I sent a letter. They ordered my parts this week. They have a redesigned synchro, also replacing the blocker ring. Not easy to get them to do it, but you have to start with your dealer and keep moving up the chain until you get high enough for them to fix the problem.
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Old 01-09-2011, 10:18 AM   #53
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Quote:
Originally Posted by togtaker View Post
I have the 1st-2nd shift problem. I took to the dealer, they said shift slower. I called customer service, they told me to shift slower. I called Tremec they said that was GM blowing smoke. I sent a letter. They ordered my parts this week. They have a redesigned synchro, also replacing the blocker ring. Not easy to get them to do it, but you have to start with your dealer and keep moving up the chain until you get high enough for them to fix the problem.
IMHO, when the dealership you take your vehicle to doesn't acknowledge the issue with your transmission, it's best to call GM directly and make a formal complaint. I can tell you this works MUCH better than arguing with the manager or advisor. GM will get the regional rep involved and his/her words work wonders.
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Old 01-12-2011, 09:19 AM   #54
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Originally Posted by Rick@RKT56 View Post
IMHO, when the dealership you take your vehicle to doesn't acknowledge the issue with your transmission, it's best to call GM directly and make a formal complaint. I can tell you this works MUCH better than arguing with the manager or advisor. GM will get the regional rep involved and his/her words work wonders.
Sometimes maby! It depends on how much the rep is in bed with the dealer, and who you get at gm, in my experience with repairs and difficult dealerships, if its an outsourced employee the chances are slim to none getting them to really care.
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Old 01-12-2011, 06:37 PM   #55
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Mine has been doing it alot when at the dragstrip. Almost everytime I run. I will probably try to co tact the dealer and get this snowball rolling. I hope they take care of me or this car will be of no use to me.
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Old 01-14-2011, 12:02 PM   #56
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upate on my trans : the local dealership i took car in oct after dissmantleing entire trans told me it was shifter and not the trans, they refused to re assemble trans unless i paid for it, i called gm 1000x and argued with them, they told me im on my own and the dealer flagged car in computer so no warranty anymore. they had car for 8 weeks or so, charged me 600 for storage, gave me all the pieces in a box and it cost me 175 for a tow and then 500 to ship car across the state to have trans put back together. the found 2 bad gears and syncros ground over. i bought car used w/ 3100 miles from a dealer that way.... nobody wanted to cover anything after i spent 5500 just for rockland to put everything back together and new clutch ect... all and all im almost 7500 out of pocket and wont get car till next week, i think its bs for gm to screw over customers like this, im submitting all the recipts to my lawyer and we will see.....the kicker is it was in the dealer for other warranty issues that they didnt even bother doing, i simply told them about the grinding, they removed trans on there own, never gave permission to and also....what is the first thing you do to pull trans out of this car???? 1st thing is the shifter, so if you saw an aftermarket shifter that you woulnt warranty ( if it was the prob which it wasnt) doesnt that warrent a phone call explaining that it may not be covered befor you dissassemble the whole thing??????????? this is how i got car back plus a shit ton of dings/dents and scratches. all the gears and everything thrown in a bin and everything else tossed inside the car..... someone please tell me how to post a pic and ill show ya
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Old 01-14-2011, 12:05 PM   #57
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Old 01-14-2011, 12:16 PM   #58
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i dont mean to hijack this tread, i just want you guys to see...
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Old 01-14-2011, 01:06 PM   #59
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Quote:
Originally Posted by denster View Post
I set my pic to show my ride. ....still looks cool. You just can't shift fast or you'll grind.
This is just bull. One should NOT accept that as an answer. Keep pestering the hell out of your dealer or call chevy and sick the district manager of that area on them.

GM just has a faulty synchronizer setup for 1st to 2nd and they just haven't fixed it, so they give us this bull**** answer in a service bulletin.
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Old 01-14-2011, 01:10 PM   #60
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[QUOTE=adc174;2730150]i dont mean to hijack this tread, i just want you guys to see...[/]

THAT IS CRAZY. If they did that to my car, I'd probably go to jail from baseball batting their whole lot of cars. UNBELIEVABLE they could do that to you.
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Old 01-14-2011, 01:32 PM   #61
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im am so pissed off t everyone involved, the chevy dealer i bought it from, the dealer i brought it to, and gm customer assistance . all told me im on my own. i put 900 miles on this car and paid 40k for it plus i did suspention and gears ect. un real that they can get away with this, i am debating calling the news
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Old 01-14-2011, 01:41 PM   #62
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My 2010 is in the shop for the exact same problem.
been in 2 weeks and they tell me they need to order SPECIAL TOOLS to remove the trans!!! WTF!!!

We need to find a way to get GM to make this a TSB or a RECALL.
There are numerous people here having the same issues.

forgot to add 2600 miles on the clock.
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Old 01-14-2011, 10:21 PM   #63
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Mine does it at slow speeds. It's always the 1-2 shift. Thought it was me at first.

That transmission take apart sounds like a real nightmare. It is possible changing the shifter could allow them to void the warranty. They can blame the situation on the shifter and get away with not repairing your transmission.

What I might do is put my stock shifter handle on before I take it in the dealer. The Barton lets you have either.
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Old 01-15-2011, 11:52 AM   #64
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Dealerships or shops can not perform paying work with out written permission from the customers ok, if they do then by law the customer is not responsible for any money owed! Take your receipts to your lawyer and start a suit to get your money back, dealerships should know better than that!
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Old 01-15-2011, 12:05 PM   #65
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my issue with that is i bought the car from a chevy dealership, it had most of the work except gears and suspention already done.....thats how i bought it i had a problem and now everyone said im on my own, plus like i said #1 its a divored shifter (cable driven) so how can i have a problem with only 2 gears grinding and not all of them, #2 i stated to them at the dealer to check into the grinding noise, they ripped trans out of the car and dissasmbled...never even calling me to tell me what they were doing. and one of the first things you need to do is disconnect the shifter. so why didnt i get a call at that point to tell me , you have an aftermarket shifter and if this is shifter related you will not be covered... and # 3 the shop that is fixing it immediatly found bad syncro and gears when they went through the bin of internal trans parts the dealer left me with. how can you be allowed to take my car apart,trans, clutch,exhuaust subframe connectors and dismantle entire trans stuff all the parts into my interior, scratch and dent my car charge me storage and tell me to f#$k off.....it aint right..not to mention when the trans was hanging i now have a radiator leak, prob pulled on the hoses but still. its bs... after 3 diffrent gm reps and all the bs run around i was left to take the pieces and go find someone to put all back together
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Old 01-15-2011, 12:47 PM   #66
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Just sad.
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Old 01-15-2011, 02:09 PM   #67
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Originally Posted by adc174 View Post
my issue with that is i bought the car from a chevy dealership, it had most of the work except gears and suspention already done.....thats how i bought it i had a problem and now everyone said im on my own, plus like i said #1 its a divored shifter (cable driven) so how can i have a problem with only 2 gears grinding and not all of them, #2 i stated to them at the dealer to check into the grinding noise, they ripped trans out of the car and dissasmbled...never even calling me to tell me what they were doing. and one of the first things you need to do is disconnect the shifter. so why didnt i get a call at that point to tell me , you have an aftermarket shifter and if this is shifter related you will not be covered... and # 3 the shop that is fixing it immediatly found bad syncro and gears when they went through the bin of internal trans parts the dealer left me with. how can you be allowed to take my car apart,trans, clutch,exhuaust subframe connectors and dismantle entire trans stuff all the parts into my interior, scratch and dent my car charge me storage and tell me to f#$k off.....it aint right..not to mention when the trans was hanging i now have a radiator leak, prob pulled on the hoses but still. its bs... after 3 diffrent gm reps and all the bs run around i was left to take the pieces and go find someone to put all back together

By law don't they have to prove that your bolt on's caused the gear grind? They would need 100% proof of it to void a warranty claim I thought. Wouldn't the Magnuson-Moss Warranty Act apply here? http://en.wikipedia.org/wiki/Magnuson-Moss_Warranty_Act
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Old 01-15-2011, 03:11 PM   #68
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That is UNREAL!
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Old 01-15-2011, 10:46 PM   #69
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Quote:
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I have the 1st-2nd shift problem. I took to the dealer, they said shift slower. I called customer service, they told me to shift slower. I called Tremec they said that was GM blowing smoke. I sent a letter. They ordered my parts this week. They have a redesigned synchro, also replacing the blocker ring. Not easy to get them to do it, but you have to start with your dealer and keep moving up the chain until you get high enough for them to fix the problem.
All of the discussions are stating the same problem I am having. I have 1600 on the car and the shifts from 1 to 2 and 2 to 3 SUCK!!! My other car, a daily driver is as 5 speed stick and I have 145K on it. I definately know how to drive a stick and this trans is NOT right. I will follow your lead and go for the upgraded trans. THANKS FOR THE INTEL!!

BTW...I don't know about it in other states, but here in California if you don't SIGN the authorization to have the work performed or give verbal consent over the phone, it is ON THEM! They also have to fix the problem within the cost of the written estimate and nothing over 10% of that. In California you call the Bureau of Automotive Repair (BAR), that usually gets the dealers attention real quick.
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Old 01-16-2011, 01:43 AM   #70
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2nd to 3rd always grinds for me until she's warmed up. I tend to shift from 2nd to 4th for the first few miles til she's ready. Not happy having to do this workaround, but i'll be visiting my local guy come springtime after she wakes from hibernation.
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Old 01-16-2011, 02:02 AM   #71
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I was going to get a stick, sounds like the same problem I have with my present ride, which is a 2009 Dodge Challenger SRT8 6 speed, guess I will get the automatic, same stick trans, same problem........................................... .
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Old 01-16-2011, 12:37 PM   #72
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I have the 1st-2nd shift problem. I took to the dealer, they said shift slower. I called customer service, they told me to shift slower. I called Tremec they said that was GM blowing smoke. I sent a letter. They ordered my parts this week. They have a redesigned synchro, also replacing the blocker ring. Not easy to get them to do it, but you have to start with your dealer and keep moving up the chain until you get high enough for them to fix the problem.
Can you forward me the invoice/receipt when you have the trans repaired? I would like to see the updated gear/synchro to see exactly what it is. Thanks.
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Old 01-17-2011, 04:42 PM   #73
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UPDATE:
I have an appointment with my dealer on Friday to document my transmission issues. My dealer checked any/all TSBs regarding trans issues specifically for Camaros...NONE!

Whats up with that? People aren't reporting or they have modified their cars to void warranty??? Plenty of write ups about trans problems NOT to raise a red flag somewhere.
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Old 01-17-2011, 05:16 PM   #74
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Just wanted to give an update about my ride. Sorry if this offends anyone with this issue, but since the dealership put a new trans in, I've had no issues. I can empathise with all you though, becuase I had the exact same issues from day 1. I took it to one dealer and they flat out lied to my face. It was disgusting. Took it somewhere else and they noticed the issue immediately. I'll leave everyone with one thought, make sure you report the problem to the GM customer service and file a complaint. It's up to everyone to get the problem documented.
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Old 01-17-2011, 09:25 PM   #75
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Very interesting. So you can perform high RPM shifts without grinding? Was the clutch/hydraulics replaced also?
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