My trans has had a hard 2-1 downshift for awile now. It only does it once in the morning when cold. It won't do it anymore until the next mornings first 2-1 downshift. Any thoughts?
2-1 hard downshift
- Thread starter LB7Diesel
- Start date
There is a set of taps that is just for downshifting. When I would run a Kodiak TCM it would knock your teeth out at first.
We need to figure out what to adjust.
Make sure your TCM tune DOES NOT have adaptive downshifting DISABLED.
We need to figure out what to adjust.
Make sure your TCM tune DOES NOT have adaptive downshifting DISABLED.
Weird it goes away after you get some heat into the tranny. Is it when you apply the brakes? I ask becomes sometimes mine has some quirky downshifts when braking.
But I'll get a buzzing in the peddle like the ABS is kicking in.
But I'll get a buzzing in the peddle like the ABS is kicking in.
My truck does it also. I would imagine that it has something to do with the apply and release of the larger clutch stacks, different friction coefficient, and thicker fluid when cold. I think the changes that have been made in a built Alli falls out of the adapt strategy parameter.
Great feedback and info guy's, Thanks:hug:
As long as Kevin and Mike's truck do it, I'm ok with it
I'm not so sure it's heat that keeps it from continuing to do this.B/c I can go 100ft stop and it'll downshift hard, go another 100ft and it won't do it anymore Maybe it's from sitting all night and things sticking a little.
As long as Kevin and Mike's truck do it, I'm ok with it
I'm not so sure it's heat that keeps it from continuing to do this.B/c I can go 100ft stop and it'll downshift hard, go another 100ft and it won't do it anymore
Maybe it's from sitting all night and things sticking a little.
Crazy, very cold here the other night about 29 degrees and mine did it from 2 down to 1. It has never done that before... I warmed the truck up and got up to second gear before the first stop sign. I slowed down and it hit 1st hard. Has not done it since....
Mine was doing the same thing, and seemed to do it mostly while in Tow/Haul mode while braking hard. Like an ass it was one of the things I complained about to the dealer when my warrantee was about to expire, thinking I wanted to get it on record that there were tranny issues, in case it blew up for some reason . Well after I picked it up they told me there was a reflash for the computer. (didn't say if it was a trans or engine flash). I was pissed, I really didn't want them messing with my tune (was back to stock at the time) but was nothing I could do at that point. Now that I'm done bitchin the trans has never hard downshifted since, and it was doing it daily when I took it in. Maybe those knuckleheads actually have a fix????
. Well after I picked it up they told me there was a reflash for the computer. (didn't say if it was a trans or engine flash). I was pissed, I really didn't want them messing with my tune (was back to stock at the time) but was nothing I could do at that point. Now that I'm done bitchin the trans has never hard downshifted since, and it was doing it daily when I took it in. Maybe those knuckleheads actually have a fix????
Mine was doing this until I broke it; since I rebuilt it, I haven't had that funky 2-1. Mine did all the stuff described above; goes away when warmed up a little, ABS kicks in... :dontknow:
Mind does it. It can be minimized with idle rpm and a torque talbe mod......at least mine seem to have. Its not as harsh, it still clicks but you dont feel it.