Does your speedometer work? If it does, it is not the speed sensor.
A common issue for this problem is the governor. It is at the back of the transmission on the drivers side under a round cover. It just pulls out. There is a plastic gear on the end that wears out the teeth and it does not turn.
I would look at that first.
Refer to "Service Bulletins" section prior to performing the following procedure.
1. Raise and support vehicle
2. If necessary, remove exhaust system.
3. Remove governor cover from case using extreme care not to damage cover. If cover is damaged, it should be replaced.
4. Remove governor.
5. Reverse procedure to install and check fluid level.
Monday, February 11th, 2019 AT 10:14 AM