Is this common with 3.73's and a 3600+ stall?
 

At times, when going WOT in 2nd or 3rd gear the trans will not downshift right away - rather it bogs down as I push the pedal for about 3-5 seconds and then decides to shift. I was told it was possibly due to my gears and TC? BTW, I am throwing P0121 TPS sensor codes. Last time this happened the tuner was able to tune it out. It seems to happen every couple thousand miles and I just hate taking it back each time and wasting my tuners time on this. what are your thoughts . . .
thanks

buy hptuners? see my video ^^^ up top ^^^ if you're tps V is screwed the trans is gonna not shift very well. might wanna dig around and log your tps to see if its a nice smooth transient when pedaling up down.

i'm at .5v resting position with 4.61V at wot (required grinding and adjusting the cruise control adjuster-doohickey) was 4.3V before which was kinda lame, ground it down, went to 4.5V , adjusted the cruise adjuster and it went to 4.61V.

my bro's car (99) goes to 4.71V at WOT (in theory this is too much V and should throw a code, but indeed doesn't on his 99 ws6)

well, replaced the TPS sensor but issue still happens. Guys have any ideas before I yank this F#$%^&g 4l60e out after this season is over . . .