Allison Shifting Issue

[BradHend]

Just purchased a 2005 Monaco Cayman a few weeks ago.  This problem never happened during our test drive, but the day I picked it up I noticed it when I parked it in the driveway.  It is very intermittent, but when it happens, it’s quite a nuisance.   I know temperature doesn’t seems to have a role in the issue.  Anyways, sometimes when shifting on the keypad from any gear position to another, even neutral, the service light comes on and the gear display goes dead.  Can’t do anything until a shut the engine down and restart. Sometimes it will be back to N, other times it stays dead until I press N twice, at which time the display reads NN.   Just not sure on how to proceed on this, aside from taking it in.  Quite annoying when needing to back in somewhere and I have to restart several times. Thanks for any input.  No issues otherwise that I can tell. 

[Chuck B 2004 Windsor]

This was discussed at a Allison seminar I attended.  Allison recommends that when shifting from forward to reverse gear that you shift from forward gear to neutral and then to reverse.  Same from reverse to forward.  Chuck B 2004 Windsor

[jacwjames]

This doesn't seem like just a "shifting" issue.  What transmission do you have.  Do you have any way to pull codes on your transmission.