When in any gear, the truck loses acceleration and the gears start shifting down all the way to 1sr gear if I let it; I have to put it on neutral and then in drive and it will go back to normal but only for a little while and will do it again.
The computer code is " power down in gear...ID 560".
Dropping all gears, 2012 Prostar auto tranny
Discussion in 'International Forum' started by Edgrmndz, Feb 12, 2020.