727 2-3 upshift VERY harsh

If they didn’t install a 5.0 lever for the front servo, then that’s part of ur problem. U will need to adjust the front band to 2 1/2 turns from snug with short wrench if u don’t have an inch pound torque wrench. Torque is 72 inch pounds then back off band 2 1/2 turns the tighten lock nut. Kim