Shift Kit + 4.10s + Stock converter = Hard 1-2 shift, need options
#1
Shift Kit + 4.10s + Stock converter = Hard 1-2 shift, need options
My part throttle 1-2 shift seems rather harsh after the shift kit install. I have my pressures set back to stock, so that is not the problem. I am thinking my 4.10s + stock coverter + Corvette Servo + stock 16's are making it rather hard. I did not use any spacers in the accumulator thing, but I used 2 spacers between the servos for the band adjustment....
I am thinking of lowering my 1-2 base pressures ~5% to help.... I have not done any WOT runs cause the gears are still breaking in....
Anyone else have this issue or think lowering the base pressure a little bit will work??
I am thinking of lowering my 1-2 base pressures ~5% to help.... I have not done any WOT runs cause the gears are still breaking in....
Anyone else have this issue or think lowering the base pressure a little bit will work??
#3
TECH Veteran
iTrader: (24)
I agree, while I don't know the scientifics behind it, I've heard that a looser torque converter softens shifts. I would assume that since the converter is physically smaller, it doesn't deliver as much transfluid so line pressures aren't as high as with a stock converter. That's probably dead wrong though, LOL.
#4
Sp you think lowering the pressures a little bit is ok? I have read that I need to log the pressures and lower them until the shift is quick but not harsh...
#7
We just spun the driveshaft to make sure it could be turned like the instructions said. I will try removing one of the spacers before I lower the pressures any.
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#8
11 Second Truck Club
iTrader: (48)
yes, we checked the 1/8" play on the band. it was a lot looser than mine when I put in 2 spacers I could not move the band or the drive shaft. I put one in and is was movable and had play. i also used one shim/spacer in the 1-2 accum. i like my 1-2 shift. it is hard when you want it to be.
#9
TECH Senior Member
iTrader: (79)
yes, we checked the 1/8" play on the band. it was a lot looser than mine when I put in 2 spacers I could not move the band or the drive shaft. I put one in and is was movable and had play. i also used one shim/spacer in the 1-2 accum. i like my 1-2 shift. it is hard when you want it to be.