cals400ex

iTrader: (27)

my buddy has a pro built tranny in his 1987 iroc. he runs a vig 3200 stall. we are having some very difficult problems when it comes to shifting. he ordered a b&m recalibration kit that has new weights and springs. this has not seemed to help us. we are looking for a shift point right around 6000 rpms for his built motor. if we get it dialed in to shift right from first to second, for example, it maybe off by 1500 or 2000 rpms on the 2nd to 3rd shift. we have tried multiple combination with nothing that is even close yet. we have also noticed that they told us that the springs are for fine tuning. well, we have tried one spring lighter or one spring firmer than what we have in it numerous times. this one slight spring change has shown to change the shifts at full throttle 1500 or 2000 rpms as well. does anyone have any suggestions? maybe we just need to take it to a tranny shop?

performabuilt

iTrader: (25)

Trying to get exact shift point auto on a 700r4 is a pain. I always ended up just going manual shifts. Thats why I like the 60e so much more ajustability on a screen

Gilbert@Ace Racing

Give us a call. I'm pretty sure one of us can offer some advice.

g

cals400ex

iTrader: (27)

i am not sure how you can be consistent with manually shifting. ratchethed, we will give you a call. we will take any advice that anyone has. i am wondering if part of the problem lies in the b&m recalibration kit. i have read that a few people noticed that there is flaws in their weights.

cals400ex

iTrader: (27)

by the way performabuilt, when you manually shift it i guess we need weights in the car that make it shift early? this way we can hold it up to the rpm we want. right now it won't shift out of one gear since it hits the rev limiter at 7000 rpms and the next gear it shifts out at 4500, which is way too low for his built motor.

9000th01ss

iTrader: (10)

For higher wot shifts use lighter weights. Springs do almost nothing at wot.
If the weights don't fix the problem you have to change the shift valve springs. I never had to change those, always been able to dial them in with the governor weights.

performabuilt

iTrader: (25)

Oh yes It can be done but its a tedious process at best and yes if you wanted it to shift right when you move the shifter you would need to set governor up for early shifts ,

cals400ex

iTrader: (27)

in our case springs do a lot. a spring swap is giving us as much of a difference as a weight swap a lot of the times. this is what confuses us...

performabuilt

iTrader: (25)

I wish could be of more help but though I have done it , It is indeed a very trial and error tedious task