Hi All,

I have a 4L60E behind a 454. Took pretty good care to build the tranny strong enough.

I am having a situation where the Torque Converter seems to be locking up prematurely... it is happening about WHEN it should happen but according to the scanner- the ECM has not yet commanded a lockup. So what it feels like is a lot of mid throttle hesitation where the RPM's go up and down kind of erratically as the TQ locks up and unlocks.

I know it is the TQ b.c if I slightly touch the brakes to force the TCC off... then the issue goes away.

I am having trouble understanding if this is a chip thing or something else maybe asking the TCC to engage or is it doing it itself???

This didnt happen for a year or so but just recently started happening.

Any thoughts welcome!!!