Originally Posted by
chevyman97
Hey everyone,
I recently installed a 2600 rpm stall converter and the rpm at higher speeds are just crazy right now and I need help ensuring the torque converter clutch is locking up. Circle d told me that at highway speeds the converter will have the same rpm as the stock converter when the clutch locks up making it a 1:1 ratio. This was not the case that I saw even with PWM % going to 98% according to the scanner. I attached the scan and tune file to this.
I saw on other forums when tuning the new stall converter the TCC duty cycle tables should be tuned to 100max/60min. Is this only applied on the TCC duty cycle tables or do I have to do this for 3rd and 4th gear, if so I cant find those tables. Or do I tune the speed vs gear apply/release tables to set my speed for which I prefer the converter to lock up?
Also last question, does anyone know if pattern A or B is the tow haul mode? I would like to tune the tow haul mode to ensure the converter stays locked up most of the time to manage heat. It's got a big cooler on it so I think it will be okay but still.
Thanks for all the advise. I'm still new to this but am very eager to learn and appreciate any and all input!