I pulled the trans to have the converter tightened up and since I was there I had the trans ckd out. Found that there had been some slippage in the forward clutch and the band so I had my trans rebuilt with billet input and output shafts, billet 2nd and 4th gear servos, etc. Previously, it had a corvette servo (nice crisp shift), but this time we went with the billlet 2nd gear servo along with all of the other mods. The trans shifts great, but the 1/2 shift is really firm at moderate to heavy acceleration. The builders intent wasn't to create a firm or harsh shift, but he was trying to increase capacity/holding force.
The trans is in an AWD Silverado SS that currently runs 12.20's. I will be dropping those times down into the 11's and I'm afraid with the firm shifts I have now, it will break stuff.
I would like to soften up the shift by one of the two methods:
1. Reduce the values in the 1/2 shift pressure table
2. Go back to the vette servo
I would prefer #1 but I'm afraid of reducing the pressure and potentially damaging the band.....Maybe a normal practice though hence my question....
Thoughts?