I have a 1985 Volvo 240 with a manual transmission w/ push-button overdrive. The overdrive has not been engaging and here is what the car will do when attempting to shift into overdrive:
Driving in 4th gear, I press clutch and push overdrive button
Hear relay click, light goes on, release clutch
Overdrive does not engage
If I let off the gas, the RPMs drop to about idle and I can feel the tranny trying to grab a gear as the car makes a jerking action.
If I get on the gas again, the RPMs resume what they would normally be in 4th gear, but overdrive has not engaged.
I have checked under the car at the solenoid to listen for a clicking sound when OD button is pushed w/ key on, motor off and I can hear the click.
Any help on this issue would be greatly appreciated.
PS...once in a blue moon, the OD will actually engage but after about ten minutes it disengages and will not re-engage.