Somewhat eliminated TM on 8.1

CMNTMXR81 · January 13, 2003

I got some time to use a Tech 2 Saturday and do some playing with it.

I got into one table, "% of DC". Mine was set at minimum = 0% and Maximum = 91%. So I zero'd out the Maximum number and let it download to my PCM, however after about an hour, the thing was still downloading to the PCM and the technician needed the Tech 2 back so I just hit "done" on the prompt menu and let it be.

The way home was quite the trip. First my T.A.P. was trying to relearn it's shift and disconnect points. When I'd come to a stop, the transmission would disconnect with a thud. After a few lights this went away but ohhh the fun I had.

Before hand I could light them up from a dead stop. Saturday night, I'd be rolling at 15 mph and drop the hammer and the truck was sideways and the one time I kept it straight, I left two black strips about a block long. From 1st to 2nd, no TM!!! Yeeehaaa. From 2nd to 3rd, no TM!!! Yeeehaaaa. From 3rd to 4th? D*MN TM!!! This must've been where it was at when I hit "done" I wonder if it also affected my shift rpm as it wound a up to nearly redline before shifting. Before hand it'd get no where near redline before shifting which annoyed the f*ck outta me.

Oh well, when I get more time with a Tech 2, I'll continue to futz with it. For now, I thought I'd just post my results.

MarkD · January 13, 2003

congrats! sounds like a blast! :thumb:

kylant · January 13, 2003

since you were able to get rid of torque management for the allison using the tech 2, is there any way to use the tech 2 to change programming for bigger size tires??

thanks

Woody1 · January 13, 2003

I think I will let YOU play with that before I get into it! See if something dasterdly happens with yours 1st, then I know I wont do that too! Keep me posted though on how things work out. Make sure you pull a trailer too! See how it pulls going up hills and a headwind too.K?

02 2500 Avalanche · January 14, 2003

CMNTMXR81, Will this work on the 4l85e also? If so Im sure I could get some time in on the tech2 at my local dealership because I know everyone there. But I have never used one before, Is it hard to use? I already have the superchips and that got rid of some TM but I want it all gone. If you could steer me in the right direction I would appreaciate it.

Alex

bcfitzsimons · January 14, 2003

CMNT, Chevy and Allison should hire you outright as a "durability consultant." Think of it-having fun, and getting paid to do it!

Fitz

CMNTMXR81 · January 14, 2003

To answer your questions;

since you were able to get rid of torque management for the allison using the tech 2, is there any way to use the tech 2 to change programming for bigger size tires??

Yes and no. Yes you can change tires sizes. But only to sizes that the vehicle came with as standard equipment and as optional equipment. For instance, 245/75/16 was my stock size and it was the biggest tire available on an HD. I can not program with a Tech 2 for the 285/75/16's I currently have on as it was not an optional size. So then it's "no."

I think I will let YOU play with that before I get into it! See if something dasterdly happens with yours 1st, then I know I wont do that too! Keep me posted though on how things work out. Make sure you pull a trailer too! See how it pulls going up hills and a headwind too.K?

No problem! I like blowing things up. Actually, Sunday I ended up pulling a friends Bravada (with a Typhoon engine and running gear in it) as it's fuel pump died. Bravada's (from the one I owned, weigh about 4,500lbs plus my trailer at about 1,500lbs for a total of 6,000lbs is by far NOT the heaviest I've towed, but still not a light trailer. It pulled it with no problems. The guy who owns it works at Navistar (I.E. Powerstroke plant) and his loaner from the company was nothing other than an F-250SD with Powerstroke. While we were pulling onto the expressway and accelerated, I easily passed him. Not that we were full throttle racing or anything. He even admitted when we got to the place we were taking his BraPhoon that the Big Block moves pretty well.

Will this work on the 4l85e also? If so Im sure I could get some time in on the tech2 at my local dealership because I know everyone there. But I have never used one before, Is it hard to use? I already have the superchips and that got rid of some TM but I want it all gone. If you could steer me in the right direction I would appreaciate it.

When you plug it in, you'll select through your engine and transmission setup and it'll take you into the menus pertaining to your transmission. Since I have the Allison, I immediately selected "5 speed automatic" so I didn't go in and see what was available for the "4 Speed Automatic" or "6 Speed Manual" which were the other two choices. If you go into the High performance section, I detailed my footsteps of how I got into it. The Tech2 is pretty user friendly to use and bet it's a lot easier to use than the Superchips tuner as it has a full 4" monitor (like a laptop) and will pretty much prompt you through stuff with a menu at the bottom of the screen which line up with the "soft keys" (the buttons under the screen).

The hardest part will be figuring out what you've got access to.

02 2500 Avalanche · January 15, 2003

Thanks CM

QUIKAG · January 15, 2003

You are the pioneer, CMNTMXR81, keep up the great work!! My brother is in the market for a new truck as his '99 Z71 is about used up. I'm trying to talk him into an HD, either an 8.1 or a Duramax.. I take it you like the 8.1?