For the last 3 years i have been having a problem with my TCC that i can't seem to figure out. If im going over 60mph for more than 15 seconds the TCC will quickly disengage. But if i drive under 60mph the TCC works just as it should without a single problem. Theres NO fault codes at all according to my tech2 and everything else works as it should. I can command TCC on with the tech2 perfectly while going 60mph+ without any problems. I've tried with 2 different PCMs and i have changed all the speed sensors. The only lead i have is that according to the misfire graph it misfires like crazy 60mph+ but the engine is clearly not misfiring at all. Also no misfire codes so i don't know how much of a accurate lead this is. Does anyone know what can make TCC just disengage like this without even giving a hint of whats wrong? This is the most infuriating problem i have ever had with any gmt400 argh.
and yes i have already changed spark plugs, plug wires, dist cap, rotor, the whole distributor 3 times, crank position sensor, knock sensor, maf sensor, fuel injector spider, map sensor, both o2 sensors, speed sensors and 2 PCMs without any luck.
and yes i have already changed spark plugs, plug wires, dist cap, rotor, the whole distributor 3 times, crank position sensor, knock sensor, maf sensor, fuel injector spider, map sensor, both o2 sensors, speed sensors and 2 PCMs without any luck.