Overdrive i unplugged the speed sensor figuring if it acts the same {wont go into overdrive}, then it must be the speed sensor. but, it didnt shift right and starting off from a dead stop, it started out in like second or third gear. so, the speed sensor must be working, right? because i plugged it back in and it shifts fine now. it just wont go into final "overdrive". can somebody please tell me what i should do next to figure this thing out?

SOURCE: transmission stuck in third gear when selector in

The problem is most likely an input or output sensor on the gearbox. I tried changing the transmission oil which worked for a few weeks and the problem started again. I also tried removing the sensor and wiping them which also worked for a little while. In the end I bought a second hand sensor from a wrecker for about $60 and no problems for the last 4 months. You can find them online as a set for about $150 new but I have a little bit of scottish in my blood. There are a few posts on the web about how to change the sensor. It takes about 20 mins for a handy person and it took me about a half hour.

Marvin

• 85242 Answers
• Posted on Nov 15, 2008

SOURCE: Overdrive sensor

NO, just replace the Vehicle Speed Sensor, it is on the transmission.

SOURCE: 3rd gear help please!

I have a 2002 Hyundai Sonata and I had the same problem. But mine would always shift into 3rd gear and STAY there until I turned the car off. I took it to a Hyundai dealer and he had to rewire a speed sensor on top of the transmission. Apparently a little animal got up in that tight little spot and gnawed on my sensor wires. The car has run fine since. To make a long story short, it might be your speed sensor on your transmission.

SOURCE: 2001 hyundai elantra idling high

weeeeiiirrdddd. i have a 2001 hyundia elentra gls, and my third cylinder is misfiring as well. my car also revs constantly on idle and in between shifting. it will flutter between 2-3000 or it will just stay at 5000. i replaced my plugs and wires to no fix with my cylinder. autozone also told me that it sounds like my throttle position sensor needs replaced, but every part they try to sell me will not fit and they swear up and down this is the right part...

Steven Mitchell

• 68 Answers
• Posted on Feb 21, 2010

SOURCE: 2002 hyundai accent.transmission works great

Hi

Well two of the tranny codes ; P0734 and PO732 indicate gear 2,3,4 ratio incorrect. This can be caused by poor readings at the input and output speed sensors or pulse generators. The P1709 code is in reference to the kickdown servo switch.

Replacing the pulse generator set and TCM reprogramming( as per TSB) may solve your problem, otherwise you have a major component failure in the transmission unit. I would get some line pressures at the transmission checked first.

Sounds like the transmission is in fail safe mode, this happens when there is a transmission fault, you only have two gears 2nd and reverse.

Hope this helps - Steve