Full Access Member
- May 18, 2017
- Reaction score
- Treasure Coast, Florida
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Put the slip to ZERO in 5th and 6th... I didn't see if you were still using the DOD/AFM but that's a big reason why there is so much slip built in
Get rid of lock up in 1-3 gears altogether. Some say even 4th gear, but I like having the lock up in 4th above 42 mph.
I also set my upshift part throttle shifts to something not so dumb..
No more hunting for gears and then bogging only to downshift
It just takes some patience and trials to get it where YOU want it. I have seen
no decline in MPG either. I really really enjoy my 6L80E now .. stock it sucked !!
I use HP Tuners. You will need the software/cable/dongle package. The rest is just downloaded from them.With my 1995 OBDI Caprice 4L60E, I did something like this using the TunerCat software. I was a lot happier with the results in transmission behavior. And I believed that I was helping longevity of the transmission and engine by reducing transmission up and down shifting and engine lugging.
I basically like my 6L80E, but would definitely like to do some tweaking as described by Foggy. Especially if it would help the life of my just installed GM reman tranny. I'm not drag racing; I'm not looking for "higher performance". But I'd like to turn off the DOD/AFM and get the transmission to not lug the engine running below 1500 RPM.
I like the idea of getting rid of the lockup in 1-3 and moving the 4th lockup above 40 mph and 5th and 6th above 50 and 60 respectively if there are no longevity downsides.
What software are you using to do the tweaking? Or are you having to hire it out? I'm not sure about paying someone else for multiple tweaks to get the transmission behavior where I want it, with delays in tweaks. I'd rather buy the software and do it myself.
I usually put the transmission in neutral when at a stop light for a while. My thinking is to reduce churn in the torque converter with heat rise and load on the engine at idle. Is there any downside to that? I do have the service bulletin 70°C transmission bypass valve.
Thanks in advance.
Can someone explain these settings in greater detail?My current tune is to increase the TCC pressure (well below what others are using), bump the apply ramp on the plus side to 1.5x stock plus 10kPa, and to roll the 5/6 slip from 20 at low rpm to 10 at 2000 with a gradient in between, and reduce the adaptive to +/-5 psi. With that the slip logs close to zero under most conditions, so I think I am in an overshoot condition, where I have plenty of pressure to lockup at what the computer characterizes (guesses) at about 42-46 psi.
Can someone explain these settings in greater detail?
On the apply ramp, it looks like 1.0 is fully applied and 1000 is fully disengaged?
Looking for suggestions on reliability tune for a stock tranny. Sounds like TCC desired pressure/apply ramp/slip tables can use tweaking?
Also why 0 slip in 5&6 but not 4th? Currently I have TCC off in 4th, but I am thinking about turning it back on for slower speed cruising.
One thing I am curious if it can be tuned out is..
Going slow down a steeper hill and coasting, when re-engaging the throttle to slightly speed up, the converter slack takes a second or two to catch up. This is a pretty slow speed but I'm considering turning on the TCC for lower gears as well. It looks like stock earliest engagement is 12mph in 2nd gear(3.08 gears), whereas I've upped my shift speed to 13mph, so might engage at 14mph if I mirror the original offset between shift speed and tcc engagement. The speed where this is ocurring, I maybe going slower than that..
Can I TCC lock in 1st gear only at low throttle? (In which case I might turn it on for all gears at low throttle settings)