Allison 6speed Range inhibit after DVT

[GMPX]

Hi All,

I think the problem some were seeing was because the TAP's were not getting preset once cleared.
I have made a change to the Reset / Preset of the TAP's in the DVT panel.

There is now four options on the first row.
Clear all three TAP options first, then do the Preset all TAP Cells option.

This procedure is exactly the same as what TechII does (I logged it).

Save the attached file in to the folder -
\Program Files\EFILive\V7.5\Configuration

When you next select the 6 speed Allison DVT option you should see the new Preset TAP's option.

Cheers,
Ross

[Cougar281]

Ross, will this hel the problems I was having? I got "Shift range inhibited" with DVT just enabled, and only using TCC Clutch lock/unlock. Never touched the TAPs options.

[JoshH]

Thanks Ross, I'll give it a try.

[GMPX]

Ross, will this hel the problems I was having? I got "Shift range inhibited" with DVT just enabled, and only using TCC Clutch lock/unlock. Never touched the TAPs options.

Umm, probably not, sorry if you Emailed me or posted about this but I wasn't aware of this situation.

Cheers,
Ross

[Cougar281]

Ross, I didn't e-mail you about it, but I did post about it here. Is there anything I can do or log to help you figure out what's going on?

[Acoombs]

I haven't had anymore problems w/ mine when resetting taps or using the other new features

[JoshH]

Well, I think there are still a few bugs in the 6 speed DVT. If you have the DVT enabled it seems to work fine. Then when you deactivate it it drops into neutral, bangs real hard, and throws up a "Shift Range Inhibited" message on the DIC.

Also, I was at the Diesel Power Challenge with IdahoRob this week. We were using the DVT feature on EFILive to lock the converter and hold the truck in 5th gear. We started the dyno pull at around 1500 RPM. It got up to somewhere around 2500 and all of a sudden it jumped into neutral and the "Shift Range Inhibited" message popped up again.

I'm also still having the reverse issue when my trans is warm, but I'm not 100% sure that is because of DVT.

[JoshH]

Well, I think there are still a few bugs in the 6 speed DVT. If you have the DVT enabled it seems to work fine. Then when you deactivate it it drops into neutral, bangs real hard, and throws up a "Shift Range Inhibited" message on the DIC.

Also, I was at the Diesel Power Challenge with IdahoRob this week. We were using the DVT feature on EFILive to lock the converter and hold the truck in 5th gear. We started the dyno pull at around 1500 RPM. It got up to somewhere around 2500 and all of a sudden it jumped into neutral and the "Shift Range Inhibited" message popped up again.

I'm also still having the reverse issue when my trans is warm, but I'm not 100% sure that is because of DVT.

Okay, the reverse issue is figured out; it had nothing to do with EFI. On the other hand, the other issues mentioned do need to be addressed. I did a test with the converter lock and gear hold, and I had the same issue I mentioned that Rob had. It also still does the weird bang thing/Range Shift Inhibited when deactivated.

[joecar]

Okay, the reverse issue is figured out; it had nothing to do with EFI. On the other hand, the other issues mentioned do need to be addressed. I did a test with the converter lock and gear hold, and I had the same issue I mentioned that Rob had. It also still does the weird bang thing/Range Shift Inhibited when deactivated.

Hi Josh, what was causing the reverse issue...?

[JoshH]

Hi Josh, what was causing the reverse issue...?

It was a problem with the Reverse Pressure Switch leaking.