Transmission Overdrive Relay May Fail on Volvo 940

Problem Description and Possible Solution

The transmission overdrive relay often fails, preventing the transmission from shifting into overdrive

Problem Data
RepairPal Verified
Average mileage: 150,005 (92,000–209,456)
5 model years affected: 1991, 1992, 1993, 1994, more1995
23 people reported this problem
Viewing 1 - 9 of 9 problem details
when accelerating, cannot get the car to go over 40mph,and the transmission will not shift. There is an arrow light on, on the dashboard, when turning turbo on, cannot tell if the turbo engine is on, except for the fact it will go to 45mph.
Overdrive would normally kick on at 45 mph but at times its will not shift into overdrive and if I try to use the overdrive button to turn overdrive off and back on overdrive won't work so I have to turn off my car to reset it to make it work. Is this an overdrive solenoid issue? Or Overdrive relay?
92 Volvo 940 GL
Transmission won't shift up into high (overdrive?)If I continue driving, at 14 miles it will finally shift. Last summer when it was hot it would begin shifting up right away.

Jim
Tranny fails to upshift into overdrive,at all.
had this rolem.replaced relay still no shift
Transmission overdrive relay may fail
2004 Volvo 940 GL-Top gasket
Same issue with the transmission overdrive. Bought the car 2 years ago from a private party, and it starting acting up about 3 months after I purchased vehicle.
Intermittent won't shift into overdrive, not fixed yet...