I recently installed my TCI 4000 and have been very happy with it. However, it has some little gremlin somewhere that I can't figure out.

The car locks up *MOST* of the time. I drive it around in 3rd gear, and 90% of the time, I can depend on it to lock up just as soon as it hits 30, and in 4th, 45.

I know it locks, and it always locks smoothly. When I installed the converter, the part of the input shaft that the TC rides on was nice and smooth. I don't think it's anything mechanical. I have no way to scan it, so I can't tell if the computer is sending the signal to lock or not when this happens. However, if I throw the car in neutral at a light, shut it off, and restart it, it locks up like a charm. This is why I think it's something to do with the PCM. It's been tuned for the converter, BTW. I also have a big *** cooler, and have not seen trans temps above 165 at all so far, even when racing.

Anybody have any idea what this could be? Or does anyone local to the Montgomery, AL, area have a way to monitor the car while it's being driven, to see what's causing this.

I've read horror stories about people having this kind of thing happen, and then the TC taking a **** and grenading the trans. I don't think this is the case, but stuff like that just doesn't sit well with me. I'd rather KNOW than not know what's going on.

Any help or advice would be greatly appreciated. Thank you.

 

Anybody?

 

Lock up solenoid maybe?

 

Look for a P1870 (trans component slipping) code,
maybe immature (so no SES light). The higher stall
converters -will- exceed stock slip RPM thresholds
under any kind of sustained pulling (like uphill grade)
- even my TCI 3000 did that. You may have to raise
up these limits (Trans Diagnostics, in HPTuners) to
keep from tripping the test. When a slipping fault
is declared the PCM will no longer attempt to lock
the TCC until you restart.

 

Thanks jimmyblue. I'll have that looked at sometime soon. It's been tuned, but I don't know if he turned off that code or not. I'll shoot him a PM and ask.

 

I don't disagree that yours acted up but I do disagree with the notion that doing so is normal with big converters. I know with my SY3500 that I never see more than +/-40 RPM under lockup. A TCC that won't deliver this kind of behavior shouldn't be called a lockup converter.

 

Doesnt the trans have to be warmed up before locking in?? My vig doenst lock up till warm.

 

Lots of us with TCIs seem to see higher light-load slip
than other converters. My Fuddle does not slip at all
where my TCI used to flare by a couple of hundred RPM,
locked.