The overdrive engage/disengage on the left side of the shifter sometimes works and sometimes it doesn't. The up-arrow light is on. It will go off intermittently and when it does, the RPM's are definitely lower, telling me that it will go into 4th. Am I looking at an overdrive relay problem or am I looking at an overdrive solenoid? How hard is the fix and what kind of money can I expect to pay.
Car does not shift into 4th on 1991 Volvo 740
by Boldizsar in Belleville, IL on December 19, 2010
ANSWER by Bret Bodas on December 20, 2010
There's a good chance this is the overdrive relay. Not sure how much the part is, you can find it at the dealer or online. A person with a phillips screwdriver and a little mechanical ability can replace it in 5 minutes. The relay is under the ashtray in the center console, looks like this: http://www.ipdusa.com/version.asp?strPageHistory=search&numSearchStartRecord=1&P_ID=1604&CAT_ID=0&V_ID=3506
First starting in the morning, the shift indicator light does not come on, but after driving awhile, if I turn off the engine and restart the engine, the light comes on and will not go out and the ...