LB7: Dvt control for allison
- Thread starter 1chevy02
- Start date
Well..........I'm not sure what "dvt" is...........but it sounds like your reffering to the overdrive lockout switch on the gear selector????????
I didn't think the 02' trucks had that option. You do have a "tow/haul" mode (will illuminate a trailer on the dash) and thats NOT going to force the truck out of 5th gear. It just changes the shift 'strategy'. My 01' truck was this way and it kind-of sucked not being able to control the 4-5 and 5-4 shift when needed.
I am, of course, only going by the truck in your sig. You may be working with something else????
I didn't think the 02' trucks had that option. You do have a "tow/haul" mode (will illuminate a trailer on the dash) and thats NOT going to force the truck out of 5th gear. It just changes the shift 'strategy'. My 01' truck was this way and it kind-of sucked not being able to control the 4-5 and 5-4 shift when needed.
I am, of course, only going by the truck in your sig. You may be working with something else????
When I try to hold mine in 4th with the dvt control it will still upshift. Is this normal
are you talking about the bi-directional trans control with the EFI Live scan tool?
O.P..........I missed that! Sorry for the babling. Good luck with the fix. (I still don't know what you are talking about!)
. Good luck with the fix. (I still don't know what you are talking about!)
3250 if remember correctly. I'm gonna take it to another dyno to try and put some load on it. Do I just reflash the tcm with a higher wot upshift for the 4- 5 upshift to keep it out of fifth? The dvt responds fine and it will prevent upshifts just not downshifts.