Hello,

1. Did this truck originally had this kind of tachometer-bearing sensor ? There is a set for repair of this kind of sensors with normal hall effect sensor which is more reliable and problem free.
2. Anyway you have now different problem. Did you calibrate the truck after you have installed new sensor ?
3. Did you check the current sensor ? You can have a sensor with 4 cables or 3 cables. 3 cables current sensor is old and if you have to change it, you have to install a 4 cable sensor and change service address inside the panel so the computer knows you have installed the new execution.