How much ET will i pickup with following changes

Just talked to a buddy of mine who is way sharper than me. Thinks this used tranny i bought on here is slipping going into high gear. Need to adjust the bands and try again.
Car was identical to the 60 foot and to the 1/8 mile last night. And the 1/8 mile MPH on all the passes was nearly identical. All just over 94 mph, all 7.20 or 7.21.

Kinda tossed this idea in the garbage can. If it was slipping it wouldnt get better, and the car is in high gear well before the 1/8, and the 1/8 numbers were good, and consistent.
Just think the vert is too loose