12-08-2022, 12:59 AM | #1 |
Drives: 2011 Chevrolet Camaro SS L99 AT Join Date: Oct 2021
Location: London, UK
Posts: 69
|
6L80 logics
Sirs, could you please advise me the logic of the 6L80 transmission when you turn it into the manual mode?
Approximately at 40 - 70 mph periodic vibrations and shaking are felt, which spreads from the engine to the differential. This trembling disappears when I switch transmission to the manual mode. Also, sometimes, not constantly, I can feel shaking at the 18-25 mph, especially on climbs. Tachometer readings are smooth and do not jump. At first I thought about the AFM system, but I was told here that it could be a torque converter, which is turned off in manual transmission mode through a special solenoid in the TCM module
__________________
2011 Chevy Camaro SS AT L99 / Stock / Daily Driver
1972 Plymouth Barracuda RB V8 3X2-barrel Holley R-4382A/R-4375A/R-4383A (Hamtramck) / Stock / Weekend Driver |
12-08-2022, 07:55 AM | #2 |
Drives: 2010 2SS/RS A6 Join Date: May 2019
Location: Hki.Finland
Posts: 951
|
At what rpm ?
|
12-08-2022, 10:28 AM | #3 |
Drives: 2011 Chevrolet Camaro SS L99 AT Join Date: Oct 2021
Location: London, UK
Posts: 69
|
Approximately at 2000-2300. It's very good can be felt during cruising with constant speed on highway. Shaking looks like "yes-no yes-no", issue is not permanent .
Vibrations definitely and steadily disappears at 66.5 mph on D/S modes or in manual mode on any speed
__________________
2011 Chevy Camaro SS AT L99 / Stock / Daily Driver
1972 Plymouth Barracuda RB V8 3X2-barrel Holley R-4382A/R-4375A/R-4383A (Hamtramck) / Stock / Weekend Driver |
12-09-2022, 02:38 PM | #4 |
Drives: 2010 2SS/RS A6 Join Date: May 2019
Location: Hki.Finland
Posts: 951
|
In manual mode not vibrations in 2000-2300 rpm ?
|
12-10-2022, 09:22 AM | #5 |
Drives: 2011 Chevrolet Camaro SS L99 AT Join Date: Oct 2021
Location: London, UK
Posts: 69
|
no... they dissapear in manual mode on 5 and 6 gear. But in the traffic on 3-4 gear this trick doesn't help. Also these vibrations dissappear strictly beginning from 67mph on any transmission modes.
I suspect that the issue is with torque converter
__________________
2011 Chevy Camaro SS AT L99 / Stock / Daily Driver
1972 Plymouth Barracuda RB V8 3X2-barrel Holley R-4382A/R-4375A/R-4383A (Hamtramck) / Stock / Weekend Driver |
12-11-2022, 03:32 AM | #6 |
Drives: 2010 2SS/RS A6 Join Date: May 2019
Location: Hki.Finland
Posts: 951
|
Have you tried drive with a scanner ?
It shows converter slip in % |
12-11-2022, 05:34 AM | #7 | |
Drives: 2011 Chevy Camaro 2SS A/T Join Date: Feb 2020
Location: Swiss, Geneva
Posts: 71
|
Quote:
Somehow I saw a video on YouTube where one dude cut the TCM and changed them all, he said that these are ordinary solenoids from Bosch. Refurbished TCMs cost inadequate money, there are a lot of such offers on Ebay, but there are zero guarantees |
|
12-12-2022, 01:51 PM | #8 |
Drives: 2010 2SS/RS A6 Join Date: May 2019
Location: Hki.Finland
Posts: 951
|
|
12-16-2022, 05:35 PM | #9 | |
Drives: 2011 Chevrolet Camaro SS L99 AT Join Date: Oct 2021
Location: London, UK
Posts: 69
|
Quote:
I took the torque converter off to check anyway. After cutting it, TC was found in perfect condition without the slightest wear. I was advised to look for the cause in the engine, but I don't know where to look
__________________
2011 Chevy Camaro SS AT L99 / Stock / Daily Driver
1972 Plymouth Barracuda RB V8 3X2-barrel Holley R-4382A/R-4375A/R-4383A (Hamtramck) / Stock / Weekend Driver |
|
|
|
|
|