Carl, I know they did not replace the valve body. They ordered parts for the clutches from what they told me. I do know they re adapted the tranny as they held it over for the night. They also checked the fluid when cold the next day when I picked it up. I left it at that and when I told them the problem was still there, their answer was that it is normal and that they all do it....[rumble vibration]
To reset transmission adaptives doesn't necessarily require an overnight stay. The tech should connect StarMOBILE or WiTECH, follow the menu: ECU View -> TCM -> Misc Functions -> reset adaptives (or something close to that).
The procedure's documented on DealerCONNECT and Techauthority.com:
STANDARD PROCEDURE - TCM ADAPTATION
The adaptation procedure requires the use of the appropriate scan tool. This program allows the electronic transmission system to re-calibrate itself. This will provide the proper baseline transmission operation. The adaptation procedure should be performed if any of the following procedures are performed:
Transmission Assembly Replacement
Transmission Control Module Replacement
Clutch Plate and/or Seal Replacement
Electrohydraulic Unit Replacement or Recondition
1. With the scan tool, reset the Transmission adaptives. Resetting the adaptives will set the adaptives to factory settings.
NOTE: Perform the Coast Down Adaptations first. The Transmission Temperature must be greater than 60°C (140°F) and less than 70°C (158°F). Failure to stay within these temperature ranges will void the procedure.
2. Drive the vehicle until the transmission temperature is in the specified range.
3. Perform 4 to 5 coast downs from 5th to 4th gear and then 4th to 3rd gear.
NOTE: For Upshift adaptation, the Transmission temperature must be greater than 60°C (140°F) and less than 100°C (212°F). Failure to stay within these temperature ranges will void this procedure.
4. From a stop, moderately accelerate the vehicle and obtain all forward gear ranges while keeping the Engine RPM below 1800 RPM. Repeat this procedure 4 to 5 times.
5. Obtaining 5th gear may be difficult at 1800 RPM. Allow the transmission to shift into 5th gear at a higher RPM then lower the RPM to 1800 and perform manual shifts between 4th and 5th gears using the shift lever.
6. The TCM will store the adaptives every 10 minutes. After completion of the adaptation procedure make sure the vehicle stays running for at least 10 minutes.
Keeping the transmission fluid between 140 and 158 degrees F is tremendously difficult in hot weather and requires two people: one driver and one watching the computer for temperature compliance.
I've met techs that, as late as last summer, believed that T1N rumble strip noise is also prevalent in NCV3s.
In my experience, that's not necessarily true.
I can induce a low vibratory hum - on coasting to a stop, esp coasting to a stop on an incline, or by or turning up an incline during gentle accelerating - and I can do this by just lowering the level of transmission fluid by as little as 6.5 ounces.
-Jon