RV particulars: (venerable)Safari Sahara
Driveline (Engine, Transmission): Cummins 5.9, Allison 6sp
Miles: 109000
Year: 1994
Break Down Description: warning read out on dash – – "Do not shift"
Symptoms: no go – – drifted to roadside
Effect: nonfunctional electronic transmission – – limped back to Harlingen, Texas on house batteries charged by the generator. Apparently, an Allison MD 3060 transmission will not function without electrical power. Who knew?
Cause: alternator failure followed by insufficient power in the battery to run the transmission.
Outcome: replaced alternator next day, good to go.