How Much Pressure is too much pressure?

[Dirmaid]

I am driving an 01 Ranger with the 5r55e tranny, and I am tuning for more power. The only real question I have is how much shift pressure is too much? I'd hate to be halfway down the track and it shifts so hard it breaks stuff. Is this a realistic concern?

I wish I could say how many psi over stock I am going but the tuner has 3 levels over stock (mild, firm, and race) and firm is a hell of a shift. Merging on to the interstate flat footed, te shift into 3rd dragged my rpms from 5800 to 4000 pretty hard, so any concerns there either?

 

[06RangerXLT]

why not just leave the shift? it doesn't change performance. i wouldn't run any higher then stock.

 

[Dirmaid]

im running quarter miles and im just trying to get the power thats there to the ground in a short amount of time. with the stock shift pressure ive found that it almost doesnt want to shift at these high rpms and when it does shift i just dont feel like its getting the power down.