Volvo Repair: 92 Volvo 940, overdrive switch, fuse panel

Question
The 92 940GL volvo has an overdrive switch located on the side of the shifter. When that overdrive setting is in place the 4th gear is disengaged. Lately, my volvo has been going into that setting sometimes automatically as soon as the car is started up and the button does not work to take off the overdrive. This has been happening more and more often. Do you know what this problem is and how major of a repair is it.

Answer
more than likely the relay is bad.the relay is about 60 dollars.below is how to change the relay.


the overdrive relay is located on the fuse panel behind the ashtray.remove the ashtray and then remove trim around lighter socket then you will see 2 screws remove the screws and the storage area will come out the relay is white and about 1x1x3 inch.it will be towards the passenger side of the panel.