Have a 01 5 speed n just installed the fleece tap shift n i thought that was going to alow me to hold 4th but it still shifts into 5th with out me selecting it! Any help or info would be great guys!
Over drive lock out?????
- Thread starter Dave L Weaver
- Start date
There IS an 01 with OD/LO as I have it in my BURB now. It doesn't work like the 03+ though through the tow/haul button, you have to wire in a momentary switch directly to the TCM though and you can install an LED indicator for it.
I could never get the LED to work either.
If this is on a pulling truck, i wouldnt waste my time with the lockouts.
Its not technically an 01 od/lo. 02/early 03 (pre nbs) is when they came out with it and had it as a reflash for the 01/some 02 trucks. From factory there isnt an odlo on any 01 pickup.
James not even your 02 tune had ODLO in my truck. I have to use 03+, so i just flashed my stock TCM tune back in.
Here is the '01 OD/LO file I use in our '02...IIRC, Moonshine Tony posted it up a long time ago...
My 02 tune does have it. i used it all the time. even used it when we pulled your truck back from Mikes. that is what one of my switches on my trippin mount are for. im pretty sure i sent you my original tune too, not the one with odlo.
Haha i thought i did too but i didnt know it didnt work in your truck. Course this was when your trans was fried too
way back when on the 01-02 duramaxs you could not manually select to stay out of 5th gear. the gear selector only allowed you to select 1st,2nd,3rd, and D. Well some poeple towing trailers would have their trans start hunting between 4th and 5th gear up hills causing uneeded trans heat and wear. So GM came out with this update to flash into the TCM to allow you to hook a momentary switch up and LED to lock out 5th gear.
Lat build 02's had the software in them for OD/LO, but non ever came from GM with it. In 03 OD/LO is achieved by holding in the tow/haul button for 10 seconds(?) and then the circle around D would go away leaving you with 4th gear. Only the 03+ OS's will work this way, for the 01/02 OS you have to wire in the momentary switch and the optional LED. Also the LED has to be a small one that takes very little power and a resistor inline or built in. I got my LED's from RADIO SHACK as they have them in a few different colors(red, yellow, blue, green, and maybe a few others).