Please can someone help - 545RFE 5.7 sluggish

[SavedByGrace]

Here is a video of my issue ive been trying to figure out-

When i manually shift to first it does seem ALOT more powerful - is the TCM shifting possibly jacked up? im beyond stumped been at this for 2 years now.

03 ram 2500 5.7 545rfe real sluggish 4.56 gears no CEL

No CEL. 125K MILES. New cat new muffler new coils new TC new o2 and sensors. NEW RINGS AT 120K INCL TIMING GEAR AND transmission service. doesn't burn a dro...

youtu.be

 

[SavedByGrace]

Considering the sonnax TC kits https://www.sonnax.com/parts/29-tc-limit-valve-kit and https://www.sonnax.com/parts/4223-oversized-tcc-switch-valve-kit

 

[jws123]

Probably a valve body issue in the trans

 

[kevkev]

Mine was shifting all fd up. Bad idle,etc. When I swapped my motor I had a Torque converter labeled 05 Durango on it. Junkyard crap. I got a rebuilt torque converter from advanced auto. Shifts better and idle. But I have issues. I think its the torque converter clutch solenoid that is in the transmission.They are a plastic plunger that's known for going out.Rebuilds usually over bore them and install a sleeve with an aluminum plunger.Ill deal with it until I swap the tranny.