Hoping that someone here can help with this. I recently installed a 4L60E from a '95 B-body into a '94 Z28. I chose to run a wire for the PWM control of the TCC rather than pinning the valve & unplugging the solenoid. And of course I loaded a '95 file so that it can control the TCC.

Problem that I'm seeing is that the TCC seems to cycle on & off rapidly (1-2 seconds) when cruising at about 45-50 mph. I checked the file & the TCC engage is set for 46 mph & disengage set for 44 mph in 4th gear with relatively low load. When I had it at about 70 mph on the highway, it seemed as though it was staying locked up.

Also, I will do some further testing but I don't think it is locking up in 3rd gear and from what I see in the programming, it should be. One other thing; I believe that it was a bit low (quart or so) on fluid when it was acting up. Could that be the cause? I haven't driven it since filling.

Any help would be greatly appreciated.

Todd

 

Anyone have an idea on this?

 

That must be too tight between the parameters. Stock is 58 to engage and 44 to disengage. I had mine engaging at 45 but releasing around 35 which seemed to work OK.

Hal

 

46/44 is not "too tight".

The lockup is split into TPS %, so you need to know what % throttle the difficulty is occurring.


46/44 is stock and 58/44 is stock, but so is 77/44. It all depends on TPS %.

 

I thought the performance tables were only for the model that has the performance switch (firebird?).

Hal

 

I don't see anyone referencing performance mode tables in this thread. What I posted above is from the normal mode tables.

Even the Camaros that don't have the switch, still have the performance mode tables in the PCM.