I have my trans tune very close to where I want it, holds 3rd with TCC locked up to 47mph then shifts to OD/Locked. The issue comes in at 3rd gear in traffic when I let off the gas, the TCC unlocks, then locks back up again when I put my foot back on the gas. PWM has been hydraulically eliminated and the TC is a 3200 Circle D, so it gets annoying, not to mention the excess wear this causes. I want it to stay locked when I am at 0% throttle and the TCC lockup tables reflect this, am I missing something else that causes it to unlock? Vehicle is a 2003 4.8L GMC Sierra.