Originally Posted by
vette5797
Thanks Taz, slow for the help. Yesterday I went ahead and changed c0611 to 1degree, reflashed and went for a drive with the v2 scanning. Misfires stayed at 0 but after about ten minutes the TCC quit again. So I think that rules out misfires as the cause. I did find out though that by just shutting off the car and starting back up that the TCC will work again for a short while, even though the p0741 is current. Is there anyplace I can find the list of parameters that set P0741 on a 2008 era 4l65E. I've googled my butt off but can't find much specific to the 4l65e. Also, I don't know how this trans compares to the aforementioned 4l70 or 4t70 transmissions.
Regarding the tunes, this project started over two years ago right when the LS3 became available over the counter from GM. The GMPP complete LS3 package still wasn't available yet so I ended up with the long block version and had to purchase separately the intake,rails,injectors,coils etc. The LS3 intake wasn't available, so the Holden version with diffrent MAP sensor was used. I tell you this so you'll understand why the MAP is scaled and other mods. My original tuner started with the 2008 Silverado ECM and TCM tunes, apparently one of the only ones available at the time that used E38 and T42. Later, I think he swapped in and modified the Corvette LS3 tune for the ECM. These (hopefully I've uploaded them properly) are the tunes in the car today. Again, any help is greatly appreciated. Gary
Taz, also agree regarding the misfire detection and plan on changing that back on next flash since it didn't help cure the problem anyway.