samgm2

I recently monitored the "tcc slip" parameter in the VCM scanner (HPTUNERS). It shows that when the car is in drive but not moving that slip is about 200 %.

When the TCC is locked, it shows that slip is about 80%. That said, the TCC feels locked and engine speed matches RPM as it should.

Am I misinterpreting what this parameter is? Is there a problem in the transmission?

Sam

jimmyblue

iTrader: (11)

You might get better info from looking at the straight slip
RPM. That should be zero or less than 1 RPM, if you're really
locked and you always get a sane number at least.

GOaT Cheese

You need to look at actual TCC slip speed. With everything normal, and at 50-60 mph, on flat level road at very light load with TCC engaged your slip speed should be less than 50 RPM's, sometimes the slip is 0-5 RPM. The TCC is alowed to slip 150 RPM's before the dreaded P1870 code sets.