FijiPhil Posted October 28, 2006 Report Share Posted October 28, 2006 Well Ive looked into all of the common electrical problems that would make the OD not work. The tranny seems to be great other than this. Im guessing its something mechanical though. What is a common mechanical issue? I know very little about auto trannys, and im thinking i might be better off taking it to a shop. I just dont want to spend a lot of money right now. Any ideas? Link to comment Share on other sites More sharing options...
Shelby Posted October 28, 2006 Report Share Posted October 28, 2006 your od is diff from most od units,,the electrical part causes the od NOT to work , a simple test to see if the OD will work is to pull the relay , if it now works then the problem is in the electrical part not the trans the relay is in the fuse relay panel on the drivers side , it should be the largest relay,,and has od relay mark'd on it ,,the most common problem is the thermo ground swt on the intake near the thermostat houseing , it has to ground befor the od will work Link to comment Share on other sites More sharing options...
FijiPhil Posted October 30, 2006 Author Report Share Posted October 30, 2006 your od is diff from most od units,,the electrical part causes the od NOT to work , a simple test to see if the OD will work is to pull the relay , if it now works then the problem is in the electrical part not the trans the relay is in the fuse relay panel on the drivers side , it should be the largest relay,,and has od relay mark'd on it ,,the most common problem is the thermo ground swt on the intake near the thermostat houseing , it has to ground befor the od will work Im guessing your talking about the one by the left foot. I read somewhere that the transmission has to be under load in order for it to work. I tried to do it while i was driving but i couldnt. Can i do it when the car is still? Link to comment Share on other sites More sharing options...
mikec Posted October 30, 2006 Report Share Posted October 30, 2006 Auto tranny uses output shaft RPMs to help determine shift points so you need to be driving. That plus engine vacuum are what control the shifting. The temp switch and relay DISABLE O/D until the engine warms up; thus unplugging the relay is a quick way to activate it... if it still won't work then it's a problem with the tranny itself. Most of the time though it's the temp sensor: the wire inside it breaks apart (if the connector tang moves/twists around you can bet the sensor is shot) and the sensor has too much resistance so the relay stays in the "cold engine, disable O/D" position. mike c. Link to comment Share on other sites More sharing options...
Tom Posted November 1, 2006 Report Share Posted November 1, 2006 DITTO ON THE TEMP SWITCH.THAT CAUSED MINE TO QUIT WORKING A FEW YEARS BACK. Link to comment Share on other sites More sharing options...
BaltTSI Posted November 2, 2006 Report Share Posted November 2, 2006 And if all else fails, and you know everything electrical is working, then the next thing is the OD band it's self, it can be adjusted outside of the tranny, I adjusted mine but it was so worn out (it has material on it like a brake shoe, but is in the shape of a band that wraps around a drum, when it's engaged it holds this drum which engages 4th gear) anyway, when I tried to adjust mine it wore off the little bit of material that was left and then the metal started eating into the drum :roll: not cool, so I ended up taking the tranny out and replacing this band with a new one, works great now.If you follow the procedure for adjusting the band, and that adjusting screw goes in farther than the procedure says, then STOP, you'll just screw up your OD drum like I did if you run it like this, but I had a whole spare laying around so it was no biggy to replace just the drum....and the band Link to comment Share on other sites More sharing options...
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