12sec.5.3

iTrader: (1)

Thank you sir! I will give this a try and post the result.

12sec.5.3

iTrader: (1)

Went make a few logs and got something working. First I went find good road that I can hook up on. Without making any changes I nailed it at 50mph. PCM commanded a 2-3 shift at 5750rpm's but trans didn't shift until 6017rpm's. Changed shift at vss from 73 to 83mph and shift at rpm from 6350 to 6500rpm's. Made another log, pcm commanded 2-3 shift at 5995rpm's and trans shifted at 6612. So the trans isn't shifting exactly when commanded but it is shifting about where I want. Before, it wasn't shifting at all. I had to put it manually in 2nd and roll into it so i wouldn't spin then shift into 3rd after I reached 100% tp (about 5000rpm) so it can shift at my desired shift point. Maybe the trans went into manual shift mode and wouldn't shift at all...?

BlackGMC

iTrader: (31)

are you shift pressures stock? Did you lower your desired shift times?

12sec.5.3

iTrader: (1)

I have never messed with shift pressures but I'm shure Allen Futral did when the tune was done. I do have a vacuum mod kit on this built trans. so I'm not shure if that has something to do with it....

BlackGMC

iTrader: (31)

The vacuum mod should take care of all your pressures, so there is nothing you can do there. I have seen some trannys shift late due to lack of tranny pressures, but those were on stock trannys....

12sec.5.3

iTrader: (1)

So there's no changes to be made int the tune so the pcm would know there's a vac mod kit?

BlackGMC

iTrader: (31)

Who built the tranny? I believe all your stuff now is mechincal...

Is the shift quick and firm or is it sloppy and slow?

12sec.5.3

iTrader: (1)

A friend from lafayette built it. He's very good at it and backs up his work. He actually encourages me to tell him any problems or info I gather with it. It shifts quick and firm.