Hyundai Repair: Transmission Range Sensor Switch, obd ii autoscanner, hyundai elantra

Question
I have a 2001 Hyundai Elantra with 38,000 miles and I tested it with my OBD-II autoscanner and it gave me a PO705 trouble code..That is a transmission Range Sensor Circuit (PRNDL Input)..Afterchecking with my dealer he told me he would have to diagnos it again for $95.00 and then let me know what had to be repaired..I won't pay them $95.00 to let me know I needed a new Transmission Range switch..I can purchaes the switch for $21.00 at the dealer..Can you tell me where the Trans.Range sensor is located and how hard it is to put in a new one..The dealer said it's on the front part of the transcase and easy to get at..A picture would be helpful..Do I need any special tools to replace the sensor? As you can see I need some help.Also after changeing the sensor do I erase the code and then start the car or do I start the car and erase the code at a later time?
                                Thanks
                                   Doug  

Answer
Unfortunately, I cannot post a picture here.  But, if you'd like to see pictures and the repair procedure, you can register for a free account at www.hmaservice.com (requires Internet Explorer).

To replace the switch, you'll need a ratchet, long extension, and 10mm and 14mm sockets.  If you need to remove the battery tray-- I cannot recall if it's in the way-- you'll also need a 12mm socket.

1.  Apply the parking brake.
2.  Place the vehicle in neutral and turn the ignition switch to the accessory position.
3.  Unplug the range switch.
4.  Remove the 14mm nut and lock washer holding the shifter arm in place on the switch.
5.  Remove the shifter arm from the selector shaft.
6.  Remove the 10mm bolts holding the range switch in place.
7.  Remove the range switch and install the new switch.
8.  Install the 10mm bolts finger tight and then back them off 1/2 turn.
9.  Install the lever onto the selector shaft.
10.  Install the lock washer and securely tighten the 14mm nut.
11.  Make sure the shift lever inside the car is still in the neutral position.
12.  Align the hole in the range switch with the hole in the shift lever.
13.  Securely tighten the two 12mm bolts.
14.  Plug in the range switch.