Allison MD3060

[dimitar22]

I have problem with this transmission it is mounted on volvo FL truck year 1999, the code i get from the transmission shift selector is 4627-over current A-hi solenoid, i checked the wiring, measured the resistance of the solenoids all is ok.

Replaced the ecu from an other truck and the problem remains.

Please help i don't know what to do any more.

[joshplianfield]

can you disconnect the blue connector and use a low current probe to see how many amps it is drawing? pretty sure you can even use Allison doc and monitor amps.

[dimitar22]

Solenoid B was drawing 12 amps, all the other solenoids draw 5 amps. I replaced solenoid B and there are no fault codes.
There is one problem when i try to go forward it starts to go with 5 th gear.Tomorrow i will do a test drive to see what will hapen.