Hi, you need to remove the speed sensor and look inside the trans . Check the speed sensor rotor on the transmission output shaft. It may be loose casing the speed sensor to generate a false signal. here is an illustration,the sensor rotor is #59 in the picture.
Hi, it is not to difficult a job to do. You will have to remove the drive shaft,then unbolt and remove the transmission extension housing #29. Then you can remove the snap ring and pull sensor rotor off the output shaft.
Hi, parts stores will not carry parts like that,it is a dealer or specialty part. I don't have any information on dealers in your area,but have information on a company that does sell these parts, see the downloads that follow. Before you replace the part,I would make sure it is the problem,see if it is loose or out of place on the tailshaft or is physically damaged. Hope this helps you,Jerry.