Transmission downshifts--or not

[Kpwweb]

So this has happened to me a few times now. Slowing down exiting the highway and then making a right turn at the end of the off ramp (without totally stopping--I have a yield); oncoming traffic just starting to go, so if I go now I can get out in front without waiting for the next 20 minutes... Step on the gas, hello? I want to go. Hello? Tahoe, are you there? I don't have time for you to try to stay in gear and then figure out you need to downshift a few seconds later. Hello!!? I need to go NOW! Mr Tahoe, let's go!

Needless to say, the 6l80 and 5.3 seems reticent to downshift, especially on-throttle, then off, then on again. Then it decides to downshift two after really coaxing it and taking years off my life.

Anyone else have this problem? I love this vehicle, but this is a somewhat annoying problem for me. Transmission slow to downshift to power out of a corner? I realize it's not a sports car, but I could at least use a little grunt to merge.

Most importantly, would a tune make downshifts faster and more responsive?

Has anyone changed the + - on the column shift to work all the time, not just while in manual mode?

Thanks for any insight!

 

[chicagofan00]

Just by using the stock tunes available from Diablo helped resolve most of this issue for me in my Tahoe. I'm sure a custom tune from Lew would solve it completely.

 

[Kpwweb]

Thank you!

 

[Yukon John]

Until you tune it...hit the trailer button in the end of the shift lever....big difference. It will be in the right gear as you slow down because that tow/haul mode utilizes your engine braking as you slow down.

Try it...you'll like it !!

 

[Kpwweb]

Thanks.

I usually turn grade braking off by holding the button for 5 sec. So I have accidently turned tow/haul on by mistake. I'll have to try driving like that for awhile.

 

[jwwarren]

This lag is part of the factory programing. It is to reduce clunks to drivetrain.

 

[Kpwweb]

This lag is part of the factory programing. It is to reduce clunks to drivetrain.

Unfortunately, it bogs soo much it is going to increase clunks to my bodywork!

 

[NowZoomer]

Same here, get a tune ... never tuned before but am now a strong believer

Went with a tune from Andy at IPF, totally cleaned up the shift points and made the vehicle much more responsive and shifts "correctly" vs hunting and clunking before