goes into natural ?

[dezzi]

When I stop at a set of light for a period of time the trans seems to go in to natural and will not select any gears until I switch the engine off than restart it and than it will select gears ok. Or sometimes when I drive it and go to park it will not select reverse so i switch it off and restart it and it select ok. Des

[vxchev8]

what type of car? might be neutral safety switch. Try to see if you can start the car in D, if you can you need a new neutral safety switch. DTC should also show P0700, P0708, P0847, P0872, P0875, P1711 and P1713.

[DURAtotheMAX]

what type of car?

I would assume a duramax seeing as he posted it in the allison section... ;)

to the original poster- you need to find out what codes it is setting.

[vxchev8]

I would assume a duramax seeing as he posted it in the allison section... ;)

to the original poster- you need to find out what codes it is setting.

:doh2: Only notice "Australia" in his profile, didn't look up to see it was in the Allison section :wavetowel2:

[dezzi]

it's in a f350 I bought an adapter and stand alone computer from destroked.

[DURAtotheMAX]

call destroked.

[THEFERMANATOR]

There stand-alone set-up uses a standard 03-04 DURAMAX calibration in the TCM, so you need to have it scanned with a TECH II or EFILIVE and see what codes it is setting in the TCM.