4L65E T42 issue

[dragracn]

I am having an issue getting the T42 computer to run the 4L65E transmission. I seem to be communicating and programing the computer with HP tuners but the T42 doesn't seem to be controlling the transmission and I am getting no transmission data. I have tried the stock tune that was pulled from the T42 (2010 Camaro auto) and changing a couple things with same results. Is there something I'm over looking that needs to be changed? The transmission shifts and goes but very lazily and is causing a throttle closing issue with the engine when peddle is open. Any help is greatly appreciated.

[Jon S.]

I am having an issue getting the T42 computer to run the 4L65E transmission. I seem to be communicating and programing the computer with HP tuners but the T42 doesn't seem to be controlling the transmission and I am getting no transmission data. I have tried the stock tune that was pulled from the T42 (2010 Camaro auto) and changing a couple things with same results. Is there something I'm over looking that needs to be changed? The transmission shifts and goes but very lazily and is causing a throttle closing issue with the engine when peddle is open. Any help is greatly appreciated.

I am confused.

A T42 TCM was used to control 4-speed automatic transmissions (4L65/70/80).

A 2010 Camaro automatic would have been a 6L80 - which used a T43 TCM.

Post the tune - otherwise people will be left guessing - and you likely will not receive any help.

[kgraves]

Definitely post the tune file. If you are mixing and matching ECM and TCM, you probably have mismatched units. As mentioned before, 2010 camaro never used a 4 speed auto so a 2010 E38 will never communicate with a t42.