We have a 2007 780 (D12) with a 10-speed Eaton Fuller Ultrashift rto-16910b-dm3
On the way to the race track today, the splitter would sometimes not work, and the transmission wouldn't be able to switch ranges.
The gear display would alternate between showing F and a gear.
For a while it was stuck in low rage, when meant 20MPH top speed. I pulled to the breakdown lane and checked the diag display which showed:
Splitter High actuator (VAHS) Electrical fault inactive (7 events)
MID 130 SID 35 FMI 5
Splitter High actuator (VAHS) Mechanical fault active
MID 130 SID 35 FMI 7
I also retrieved the fault codes from the transmission (2 or 4 key turns) and got 41 and 43
I drove for a bit in the breakdown lane at 20MPH and eventually it shifted from 5th to 7th and I was able to limp it to the track. The track folks called a local shop they use and they're going to come look tomorrow.
I've got a video of the problem at:
Any ideas what it could be?