TCC issuse after converter install on G8
I have a 09' G8 GT and last week I installed a 2800 stall Vigilante Converter. After the install i took the car out for a drive and shortly into the drive I got a P0741 code for the TCC. I cleared the code and it came back after about 5 miles. I borrowed a Tech 2 from a dealership riend of mine and we went for a drive and watched the TCC it would send the siginal to activate the TCC but the transmission was showing between 300-500 of slip. The computer will only allow up to 125 rpm of slip before setting the code.
Has anyone had this issue before? Is there a way to tune for it?
Thanks
That is a nice car, What model do you have?
I like those, they are way cool. What kind of tranny do they have? The 6 speed auto, I am sure(the hydromatic 6L80. They are rear wheel drive also with a different traction sustem. My wife's 06 Monte Carlo SS has a different tranny altogether too and the DOD or the active fuel management (really the same thing, really messes with the tranny and TRQ Converter pressures with that application. It doe not hold on grade unless I really up the line pressure which I have done. It also would variably kick in at the very worst time. GM had a tech bulletin out on the tranny and the Trq Convert not holding grade. The trq Converter slipping prior to engaging broke the motor mounts and broke the tranny. GM replace the tranny and Motor mounts but never solved that problem. It continued until I increased the line pressure/RPMs and upped the idle and opened the IAC/etc up a bit I feel it is dangerous. The G8 Does have DOD right even though in Au they have all but gotten ride of that with The G8 GT is powered by a uniquely configured 6.0L small-block V-8, rated at 362 horsepower (270 kW) and 391 lb.-ft. of torque (530 Nm). A six-speed automatic transmission with manual shift mode is standard and features the fuel-saving Active Fuel Management system, which enhances fuel economy by alternating between eight- and four-cylinder power. An optional six-speed manual transmission will be available soon after launch.?
WOW a 2800 in a car with DOD (active fuel management) if that is the case?
The G8 is a great car and well engineered and I would be proud to have on in my stall. I think but the fuel economy aspects do make it difficult to alter the drive train however in a reliable fashion. I am surprised that Vigilante even had the correct type of Trq converter for such a new platform so good job even getting one. I bet the car handles great with the Mcpherson struts and all. Anyway the active fuel Mngmnt (DOD) is hard to work with for performance and the tranny. Can it be disabled?
Thanks,
98 tigershark
Drilled out and new sleeves pressed and drilled.
Hey gmh308,
That is exactly what I did. Basically a C5R head at 1/2 the price.
12.5 degrees though. Working over the Valve seats was difficult as was the cc ing.
As to making the cars that race more like production cars wont happen, I think.
It might make more enthusiasts, even thought most all of the technology for economy comes from performance guys, at least I think so!
Regarding the new trq cnvrt, mine took a little while to break in. Works great now but almost an entirely different tune.
The 98 pcm is very simple and has draw backs but simplicity with the tranny stuff is very nice.
98 tigershark