i have a 91 volvo 740 turbo, will not go into overdrive, transmission rebuilt(twice), solenoid changed(twice), computer changed, and new front wheel hubs( for speed sensors?), still no luck, any thoughts
Test the OD relay, it’s behind the ashtray at the 3 o’clock position on the relay panel.
Verify that the solenoid is getting power with ignition key on…and turns off with o.d button depressed.