Volvo TAMD75P edc stuck in ahead

[Pjwinter]

Hi Everyone,

Can I ask for some help please. I have a 2004 Sunseeker Portofino 46 with Volvo TAMD75’s, the starboard engine starts fine but although in neutral jumps into ahead straight away. If I then put it into astern it stalls the engine I’m guessing because it’s trying to select 2 gears simultaneously. I have inspected most of the electrical connections for corrosion and all seems fine. Any ideas please ? Many thanks in advance.

 

[volvopaul]

Hi Everyone,

Can I ask for some help please. I have a 2004 Sunseeker Portofino 46 with Volvo TAMD75’s, the starboard engine starts fine but although in neutral jumps into ahead straight away. If I then put it into astern it stalls the engine I’m guessing because it’s trying to select 2 gears simultaneously. I have inspected most of the electrical connections for corrosion and all seems fine. Any ideas please ? Many thanks in advance.

Remove both gearbox solenoids , it sounds like the forward one is stuck in the open position allowing oil to pass under pressure to the clutch pack .
ZF 280 gearbox or twin disc ?
you can free off the valve with a small screwdriver and some wd40 .
you will need to test for voltage at the plugs first , make sure in neutral there are no volts at each plug , if there is it could be an ECU fault or throttle potentiometer .

if your at your boat you should know better.

 

[Newbroom]

If Pauls answer dosnt work turn off the power and disconnect the big red plugs on the ECU then reconnect turn back on the power and see if it clears.