gayleking Report post Posted June 25, 2016 My 2008 Alfa sometines shifts out of gear after hitting a bump in the road. Share this post Link to post Share on other sites
wolfe10 Report post Posted June 25, 2016 gayleking, Welcome to the FMCA Forum. Assume you have the Allison 3000 series transmission. If so, the controls are electronic. What does the shift pad indicate when this occurs: 6 or N? Have you checked for diagnostic codes using the shift pad-- instructions in your Allison manual, or we can post them here. What does your dash voltmeter show: normally/when this occurs? Share this post Link to post Share on other sites
gayleking Report post Posted June 25, 2016 My shift pad indicated N when this occurs I do not know how to check the diagnostic codes for the shift pad. I have never looked at the voltmeter when this occurs so I don't know Share this post Link to post Share on other sites
wolfe10 Report post Posted June 25, 2016 To check for diagnostic codes: Ignition on/engine OFF. Push up and down arrows on the shift pad at the same time. It will bring up OL (a way to check oil level if engine running and transmission up to temperature). Not relevant for you at this time. Push up and down arrows again. This brings you to diagnostic codes. d-1 will be followed by a code. If no code, it will show d-1 - -. If there is a d-1, push mode button to go to d-2... When you have recorded all the codes, just turn off the ignition. Share this post Link to post Share on other sites
