Shift Time 0 vs 6.38?

[steveo]

i know very little about 4l60e tuning but a delayed shift at heavy throttle would allow a higher shift point, wouldn't it? seems like one of those things where you can either zero it out and set strict shift points, or set your shift points a bit early and let the delay add some dynamics to let it rev a little bit higher depending on TPS.

[deva123]

Happy New Year! Thanks for taking the time to respond. I read your reply last night after getting home from a NYE party and couldn't not comprehend. Reread it today with a clearer head and that makes total sense thanks for the explanation.

[tayto]

do some research on the LS guys that use HPTuners, i think they like to set the shift time from 0 to 0.3. Don't quote me on those numbers. I know for 4L60E short shift times will lead to longer life, there should be accompanying internal transmods as well but that is beyond the scope of this post. Not sure if the LT1 PCM has torque management or not, but if it does KEEP IT.

having a high number like 6.38 tells me that area is disabled or not used, but i am just guessing. It more likely means "no timer" or same as 0

[ralmo94]

As far as I understand a shorter shift is less slip while shifting, the settings are for the adaptive target to change the shifting pressure, it can only shift so fast, and some tutorials I have read on it say to set it to 0 and log shifting time, then set it to the fastest time you logged. I have also been told 3-4 isn't adaptive.
For what it's worth tow haul settings are all 0's.

[Kitch]

I've just had the 4L60e rebuilt in my G20 van, it's now running a Blueprint 383 with a multipoint RamJet 350 intake on it.
I'm also interested in reducing shift times as well, my shift times are still currently set to stock at the moment.
I've been trying to find some info about safe recommended settings before I change anything.

I've set it to shift from 1-2 at 5000 RPM, in the data log and I can see the shift solenoid activate close to 5000 RPM @ W.O.T but the actual shift doesn't go through until 5500 RPM.
I'm hoping reducing the shift times to appropriate levels will help reduce the RPM difference between commanded shift RPM and actual shift RPM and increase the life of the trans.

[In-Tech]

Hiya's
The "adaptives" basically don't work in these early computers. I wouldn't set anything under .25 in those fields either way. Adjust everything in the pressure tablles and/or in the force motor current table. I do both when I can.

[Kitch]

Thanks for the reply, I appreciate that you "basically don't work in these early computers" but would you have any more specific info to offer around your recommendations for changes to make in the pressure tables?