anyone know the propper way to lock out 1st and 2nd gear on a dmax tcm when in 4low for sled pulling?
anyone know the propper way to lock out 1st and 2nd gear on a dmax tcm when in 4low for sled pulling?
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
1972 Chevy Blazer, Twin Turbo Duramax 6.6
69 Maro TT 427 LSX, Wayne due Vett frnt sub,
Lateral Dynamics 3 link rear, D 60,
T56, 18X10' 18X12 Boze Forged Speedsters,
13" wilwood 6 pot fronts 13" wilwood 4 pot rears,
(all Still under construction)
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.
Peace Through Torque
Punisher Performance DSP5 Tuning, PPE Dual CP3's, 68mm Fleece Cheetah, Punisher Built trans w/ Suncoast Parts, Airdog 165, SoCal 100% Overs, ARP Studs
2013 NHRDA Sportsman World Champion
www.PunisherPerformance.com
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
2004 GMC SIERRA 2500HD ZF6 LLY
SOUTH BEND DUAL DISC CLUTCH
FASS FUEL SYSTEMS
LBZ INTAKE
you could use the scan tool to command that gear.