Where cranshaft sensor location

Most of those sensors are located next to harmonic balancer in the timing cover housing. There is a reluctor wheel on the front of the cranshaft built into the harmonic balancer. It also might be located inside the cover too but near the front of the crankshaft. Does the vehicle have no spark? The sensor helps with the correlation to time the engine for spark.

it is located on the back of the engine next to the oil filter

It is not surprizing that replacing the crankshaft position sensor did not fix your transmission shifting problem. The cranshaft position sensor is used for fuel and ignition control for the engine - it has absolutely NOTHING to do with the transmission.
i would recommend getting your transmission problem properly diagnosed by a professional that understands how your vehicle works.

The 2002 Santa Fe came with three (3) possible powertrains (engines). The 4 cylinder, and two different V6 engines - i.e. 2.4L 4 cylinder, the 2.7L V6 and the 3.5L V6.

The crankshaft position sensor on the 4 cylinder and the 3.5L V6 are in the same place - Front Crank Shaft behind the pully (behind the timing belt cover.

On the 2.7L V6, the Cranshaft Position Sensor is located in the engine block (Left Hand Side)
near the flywheel (adjacent to the LH (Bank 2) exhaust manifold.

Note: Left Hand Side means the radiator side (front) Bank 1 is the firewall side.

Hi, suspect a fuel delivery issue. first check for fuel, then check for spark.

Please see my tip at http://www.fixya.com/cars/r5821173-doesnt_car_start_gasoline_engines . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

The Crankshaft Position Sensor (CKP) is mounted on the top of the transmission bell housing. Assuming you are talking about the 3.3L V6.
The crank position sensor (ckp) is located at the back of the motor,driver's side, mounted to the transaxle housing. It gets it's single from the flywheel teeth. First unplug it and then remove the retaining bolt and pull it up and out. Reverse precedure to install.

There are two crankshaft sensors located Center front of the engine, near the base of the engine oil dipstick tube.

The crankshaft position sensor is located on the bell housing (forward area of transmission where torque converter is located). It can be reached from below (driver side). It has one wire plug in, and one (maybe 2) mounting bolts.countrycurt0

it is located on top of the tranny in behind the exhaust manifold..

Have the cranshaft position sensor checked and make sure the wiring isn't grounded somewhere. If the Crankshaft Position Sensor is bad or skipping a little the engine will crank but not start. It is located on front of engine behind fan. Haynes Manual (#24065?) has a great section on troubleshooting the sensors. Good Luck