Allison problems

[bigred03]

The other night i was out and it wouldnt go into third gear until i let off the accelerator and then it wouldnt go into over drive and shortly after that it went into im guessing limp mode. But the next morning i got into it and was gonna mess with it and it wouldnt move? Any answers? I changed the park neutral switch after all this and it didnt help.

[RickDLance]

It wouldn't move at all? Do you have a way of reading the codes?

How much extra power are you running? How hard on it are you?

[bigred03]

Im running efi live on it. It moved lastnight in third.

[Dirtbikindad393]

Sounds like you limped it. But it also sounds close to what happened to me when my TCM went south for the winter and never came back! :mad:

Like Rick says you need to check the codes if any and that will start you down the path to figuring out what happened. :thumb:

[05smoker]

Any codes? Clear those first. Put stock ECM tune back on and see how it shifts stock.

When was the last time you changed a fuel filter? It will affect shifting if your fuel is significantly restricted.

Ed

[Mike L.]

Sounds like E shift valve stuck. P0872 maybe?

[bigred03]

The codes its throwing are incorrect forth and fifth gear ratio.

[Diesel Tech]

You most likely have slipped the clutches one to many times. Clear the codes and see if it works again but keep the power down. My guess would be that C2 clutches are shot. If it starts working after clearing the codes keep the power down and start saving for an upgrade.

[bigred03]

Yeah who knows. Its going to Smokin Diesel Performance so i guess all my worries will be gone):h

[05smoker]

Yeah who knows. Its going to Smokin Diesel Performance so i guess all my worries will be gone):h

Not really. Once you build the trans that is just the start of it all!!):h