[Reel Pursuit]

2004 3200 Volvo D6 310's.

The port engine is intermittent shifting into reverse. In fact, mostly not at this point. Problem came up suddenly (at a bad time). It will  take throttle commands into reverse but just revvs. All other functions fine on both engines. Thoughts?

Had similar issues with failed FWD solenoid(theres 2 a fwd and reverse)  you can unscrew cap of solenoid and push bottom to shift manually.
The solenoid should give about 10 ohms if tested with meter.