I have been thinking about changing the TCC lockup points on my 01 TCM. Am I reading the tables right? In second gear in Non T/H mode the TC is basically never commanded to lockup??

Have any of you guys lowered these?

I have been thinking about changing the TCC lockup points on my 01 TCM. Am I reading the tables right? In second gear in Non T/H mode the TC is basically never commanded to lockup??

Have any of you guys lowered these?

You are correct it will never lock up unless you can achieve that mph in second gear. :eek:

Yes I have lowered them. :D

I have also lowered mine and have seen an improvement in mpg around town.

how far did you go?

I believe I have them set at 40 mph but it doesn't actually lock up until 45 mph. Mine has always been off since I started messing with EFI Live tranny controls.

what gear was that 4th? and did you make it 40mph flat from 75%down?

finally did you make 4th and 5th gear the same?

it looks like in 3rd the converter never really lockes untill like 85% TPS :(

that's why you switch it into T/H Mode. and force it to go early

The 01 os seems to stay in 4th alot longer then the 05 os. plus I dont like to drive around in T/H.. All the downshifting :(

yeah i noticed last night it stays in 4th at WOT until about 75mph :eyecrazy: so I adjusted it to shift sooner with EFI.

anyone know who low of a speed/rpm you can lockup the TC without breaking something?

I believe that in tow/haul mode they they they converter up at 25 mph in second gear under WOT. That is how I race my truck and I have never had a problem with it doing that.

That is what got me thinking? could you lower it more (like a copilot) then you could have a normal and Race(T/H) settings :D

you can "probably" set it to like 5mph or something really low. The TC will not lock up until the trans is in second gear anyways.

lockup in 1st gear I dont think is hydrauliclly possible because of the way the TCC solenoid is plumbed...Mike could give you a for sure answer tho.

IIRC I have mine set to lockup at 15mph in second gear at WOT, even tho my trans shifts into second gear at like 17 I think.

guys do you like to shorten your shifts as well
i have shortened a little bit but dont really notice a difference

no, for some reason on lower power tunes my trans shrot-shifts 2-3 and its annoying because the truck stops accellerating as hard because it was never given a chance to reach its 3000rpm power peak.

ben

no, for some reason on lower power tunes my trans shrot-shifts 2-3 and its annoying because the truck stops accellerating as hard because it was never given a chance to reach its 3000rpm power peak.

ben

thanks ben but i was talking about the about shift time in d5100 is that what you adjusted and now you dont shift at 3000 rpm?
i thought this was adjusted for the speed of the shift as in how fast you can shift:)

ohh duh I was thinking "short" as in early shift points.

I would NOT play around with shift timing. If you're daring and careful, I bet you could make it work really nicely with changed shift timing. BUT. A couple miliseconds in the wrong direction will cause a clutch tie up and you will be buying a new trans. You have been warned :D

hmm actull i have been playing with it for a while now stock tranny and still ticking but thanks for the advice on that i will keep that in mind when i rebuild my stock again it wont be first time i have rebuilt it..lol and prob not the last
one thing i am unsure of is tcc pwm whats the pwm and do you adjust this or has anyone else d5070 d5071 i was going to change 5070 to 8 but i dont know what this even means so that would be plain crazy

PWM = pulse width modulation. Basically instead of the Allison solenoids getting a simple 12 volts of power to energize/close them, they are "pulse width modulated". Basically the TCM pulses the power going to them like a billion times a second so they can be effectively "varied". Gives more options as far as opening the valves versus old trans's that just had a simple "open or close" on the valves. 100% PWM would effectively be full open, or, the solenoid is getting 12 volts 100% of the time. 50% PWM would mean the solenoid is getting 12 volts 50% of the time, so its kinda like its only half open. Sort of...

its like if you have a cieling fan that only has an on/off swtich (no variable speed control or anything), you can "effectvely" vary the speed of it by flicking the switch on and off really fast. Flick it on and off at a faster rate and the fan spins faster, and its like you are increasing the pulse width modulation. If you flick it on and off at a slow rate, the fan will only spin slowly. Basically its a method of speed/rate control for devices WITHOUT having an old fashioned rheostat in the circuit. Most variable speed electric motors are speed controled with digital PWM. Much better and more reliable than an old inefficent rheostat.

I think im explaining that right?

PWM = pulse width modulation. Basically instead of the Allison solenoids getting a simple 12 volts of power to energize/close them, they are "pulse width modulated". Basically the TCM pulses the power going to them like a billion times a second so they can be effectively "varied". Gives more options as far as opening the valves versus old trans's that just had a simple "open or close" on the valves. 100% PWM would effectively be full open, or, the solenoid is getting 12 volts 100% of the time. 50% PWM would mean the solenoid is getting 12 volts 50% of the time, so its kinda like its only half open. Sort of...

its like if you have a cieling fan that only has an on/off swtich (no variable speed control or anything), you can "effectvely" vary the speed of it by flicking the switch on and off really fast. Flick it on and off at a faster rate and the fan spins faster, and its like you are increasing the pulse width modulation. If you flick it on and off at a slow rate, the fan will only spin slowly. Basically its a method of speed/rate control for devices WITHOUT having an old fashioned rheostat in the circuit. Most variable speed electric motors are speed controled with digital PWM. Much better and more reliable than an old inefficent rheostat.

I think im explaining that right?

ben i have always like the way you explain things :lol:
but it puts it into a real world perspective:cool2:

no, for some reason on lower power tunes my trans shrot-shifts 2-3 and its annoying because the truck stops accellerating as hard because it was never given a chance to reach its 3000rpm power peak.

ben

ben
here i go again but if you increase the shift speed not rpm would this not help? does it do this the same in T/H?

I think the software has a strategy where 2 conditions have to be met in order for it to shift, both speed and rpm might need to be changed.

By the way at part throttle, my truck shift into 2nd at about 10-12 mph????

I think we wont fully have this under control until EFILive finds more tables in the TCM. The Ally TCM is, if you think about it, WAYYY too smart for its own good. It does not always do what the tables tell it to do. Sometimes I think it tries to think for itself and even make changes to what IT thinks is good. Its boarderline artificial intellegence!!! Run!! Grab your tin-foil hats!!! :eek: ):h

dem aleeeaaans is tryin to read arrr thots agin.

didnt the 01 tcm have issues with shift busyness
and you would loose od disable
i geuss you could wire it in but why?

didnt the 01 tcm have issues with shift busyness
and you would loose od disable
i geuss you could wire it in but why?


ben could correct me on this but i think the 01 is a slower learner
if your tranny thinking one thing and we program it to do another there is conflict and we dont want conflict i think that is why some use the 01
i am personally changing out the 01 i have been running it for about a week now and dont care for it to much i am on a stock 01 tcm
i dont use the overdrive disable very much but i dont want to wire it in either i gong to a 2003 tcm try it out next and change some settings

maybee ill try changing something on for my tire size
oh wait ive already been there!!!