Locking out gears for sled pulling

[SGFastMax]

anyone know the propper way to lock out 1st and 2nd gear on a dmax tcm when in 4low for sled pulling?

[Madspeed]

Why would you pull in 4 low? only thing I see is more chanches of breaking things in front of the tcase from the increased tourqe, But eh I dont pull

[SGFastMax]

you could never hold any high rpm in high gear pulling

[LBZoom]

As far as I know you have to set the shit speeds and RPM's high enough that those gears won't become active. For example if you set the shift speeds for first and second to 100mph they shouldn't use those gears. Just remember to flash it back before you hit the drag strip otherwise you might kick down into first when you hit 100mph lol. You may also have to lower the shift speeds for the higher gears so they cover the missing ranges of fisrt and second.

[04duramaxzf6]

i changed the shift point for first and second to part throttle shift i believe column c not 100% on that at 0 mph then i usually change the tcc to higher rpm

[L31Sleeper]

you could use the scan tool to command that gear.