Tremec Missed 1-2 shifts, Notchy

[RogerBzSS]

What the Dr said X2

Also request a drive along with a tech in the passenger seat and put the issue on
display for the technician now passenger!!!!!!

[usnavydoc]

Originally Posted by Jer4251

dealer said they couldnt find any info in the system about any transmission problems. said the trans felt fine, they compaired it to a used 2010 on the lot. also they couldnt get it to miss 2nd at 5700 rpm. was told to bring it back in when it acts up again

You should let the car cool back down. The grind tends to happen when the transmission temperature is cold. When my console gauge shows the transmission temp is at 180 degrees, I don't get the grind. At least not yet.

[HardrockSS]

well mine just did it going on the highway 2nd gear at 3,500-5500 rpm wouldn't let me go into 3rd at all grinding noise tranny was warm believe me 5,600 mi and it's a m-10

[Dr. Krabz]

Now in addition to this problem, my transmission just started making an awful noise when in 1st and 2nd gear. The best way I can describe it is it sounds like it is winding up like a jet engine about to take off. Any ideas what this might be?

[Orange Krate]

Originally Posted by Dr. Krabz

Now in addition to this problem, my transmission just started making an awful noise when in 1st and 2nd gear. The best way I can describe it is it sounds like it is winding up like a jet engine about to take off. Any ideas what this might be?

Sounds like what use to happen in the old days... a cracked synchro. But not even sure if that is possible without damaging rest of the transmission.

[Dr. Krabz]

I don't know what is going on with this thing. It just hit 4k miles the other day and it has been babied from day 1. The transmission has been nothing but trouble.

Originally Posted by Orange Krate

Sounds like what use to happen in the old days... a cracked synchro. But not even sure if that is possible without damaging rest of the transmission.

[Geo4K]

I had my heart set on a MT Camaro - it would be the best way to keep my wife and kids from driving it. This thread is giving me second thoughts. It must be bad, a simple google search would show that lawyers are already lining up about it.

What-cha gonna do?

[Orange Krate]

Originally Posted by Geo4K

I had my heart set on a MT Camaro - it would be the best way to keep my wife and kids from driving it. This thread is giving me second thoughts. It must be bad, a simple google search would show that lawyers are already lining up about it.

What-cha gonna do?

Buy the ZL1! Different M6 Tremec transmission! If the big boys can get by the Cruze recall maybe they can address the manual trans issues mentioned here. I will nurse mine until it breaks. Then I am going to see if I can transplant the ZL trans in the car. CURED.

[parietta]

Thanks for all of the great information here. I have a 2011 2SS/RS LS3 6sp and have been experiencing this same problem since purchasing the car used a little more than a year and half ago with just over 2400 miles on it. Mine only seems to grind 1st to 2nd in the mornings when the car is cold. What I've done to avoid it is to either be as gentle as possible pullling the stick (Hurst Shifter) into 2nd while the trans is still heating up or by simply avoiding the 1st to 2nd shift entirely by starting out in 2nd. Mine is due for servicing soon at nearly 14.5K miles so I will have the dealer (Folsom Chevrolet) take a look. I'll also provide this thread so that we can hopefully despense with any questions regarding user error, preceptions, etc.. Thanks everyone!

[usnavydoc]

Originally Posted by parietta

Thanks for all of the great information here. I have a 2011 2SS/RS LS3 6sp and have been experiencing this same problem since purchasing the car used a little more than a year and half ago with just over 2400 miles on it. Mine only seems to grind 1st to 2nd in the mornings when the car is cold. What I've done to avoid it is to either be as gentle as possible pullling the stick (Hurst Shifter) into 2nd while the trans is still heating up or by simply avoiding the 1st to 2nd shift entirely by starting out in 2nd. Mine is due for servicing soon at nearly 14.5K miles so I will have the dealer (Folsom Chevrolet) take a look. I'll also provide this thread so that we can hopefully despense with any questions regarding user error, preceptions, etc.. Thanks everyone!

Once your transmission temperature gauge reaches close to 180 you should be fine. I go from 1 to 3 until the temp of the transmission is up. Will be trying royal purple transmission soon and see if it gets better.

[Orange Krate]

Originally Posted by usnavydoc

Once your transmission temperature gauge reaches close to 180 you should be fine. I go from 1 to 3 until the temp of the transmission is up. Will be trying royal purple transmission soon and see if it gets better.

I finally broke down and did a full Royal Purple service on the trans and differential. There was some metal debris on the differential magnetized plug which could have been casting debris. The transmission fluid smelled burned. I have NEVER raced the car or even burned the tires in fear of toasting the clutch and notchy trans. The car has 12,500 miles when I performed the change. I know this is not possible but it honestly feels like it picked up horsepower... but I think it is the reduced friction and the smooth shifting that makes it feel quicker running through gears. The trans is not nearly as notchy and although getting into reverse at times has been a bear, it feels like it goes into reverse gear easier with less binding and resistance. Although I have only put on a few local street miles, I will be hitting the highway in a couple of weeks and try it out for a 200+ mile round trip.

[Dr. Krabz]

I don't know if this has been brought up here yet, but the thought occurred to me that the skip shift feature of the transmission might be to blame for part of the problem. I am certainly no expert, so I am just speculating based on logic and what basic knowledge I have of complex transmissions. Perhaps there is a solenoid in there which might get slightly stuck when a skip shift is not required by the computer, and the shifting rubs against it causing the sound and vibration. Just a thought...

[Orange Krate]

Originally Posted by Dr. Krabz

I don't know if this has been brought up here yet, but the thought occurred to me that the skip shift feature of the transmission might be to blame for part of the problem. I am certainly no expert, so I am just speculating based on logic and what basic knowledge I have of complex transmissions. Perhaps there is a solenoid in there which might get slightly stuck when a skip shift is not required by the computer, and the shifting rubs against it causing the sound and vibration. Just a thought...

Dr. Krabz I have the skip shift eliminator installed and with or without it it didn't change the feeling or ease of shifting. However it does allow me to shift when I want to as opposed to when the microcomputer allows me to. The problem from all that I have read is most likely transmission tolerances and alignment of gear clusters. In one case an individual had synchro gears installed backwards on the trans assemblyline! This tells me there is some real questions to be answered about QA/QI at the Tremec facility. Hey things happen, we are all human but there are too many complaints about the same thing which indicates a QA issue.

[Dr. Krabz]

That makes sense, I was just brainstorming. I hope we can get to the bottom of this soon and GM takes a firm stance to fix the problem.

Originally Posted by Orange Krate

Dr. Krabz I have the skip shift eliminator installed and with or without it it didn't change the feeling or ease of shifting. However it does allow me to shift when I want to as opposed to when the microcomputer allows me to. The problem from all that I have read is most likely transmission tolerances and alignment of gear clusters. In one case an individual had synchro gears installed backwards on the trans assemblyline! This tells me there is some real questions to be answered about QA/QI at the Tremec facility. Hey things happen, we are all human but there are too many complaints about the same thing which indicates a QA issue.