My 2012 QL Hemi Jeep GC previously had TSB 21-003-13 applied, but that TSB just changed when and how the predictable driveline clunk would occur. My Jeep experiences the fishbite too, but driving in Sport mode makes that tolerable. Last week I had TSB 21-006-13 applied to help with the tranny performance, which I thought was ok but not great. I always thought the Hemi would move the Jeep better than it did, but assumed the fishbite issue was to blame. I waited a week to make sure the fix stuck before reporting back to the forum. The tranny performance has definately improved in the auto mode and the driveline clunk is totally gone. TSB 21-003-13 was for the DCTM and TSB 21-006-13 is for the PCM, but 21-006-13 seems to have fixed the driveline clunk too! Auto mode is more responsive, but still didn't downshift as quickly as I desired in 4th and above. I returned to driving in sport mode where the 4th and above shifts are quick and sure. I noticed that the fishbite is also less due to the torque converter lockup letting go on each minor gas pedal application as evident on the tac. That alone made a big difference. Previously I couldn't tell by looking at the tac if the torque converter lockup was in or out. No more predictable 16 mph clunk, more responsive shifts, and less fishbite - with this latest update, I'm finally satisfied about how she performs and can patiently wait for the fishbite TSB fix.