Code0755 shift solenoid b after about ten miles next day whilst driving in fourth transmission goes into second

Transmission not shifting into overdrive right.

It could be a bad solenoid, or stuck valve(Most likely). Worst case is a transmission rebuild.

Have you retrained the gear? From memory think goes motor running foot firmly on brake park to neutral three times, neutral to reserve three times, neutral to drive three times, keep going thru all gears Then drive car normal for ten minutes minium as you usually would.

Here is what the service manual says about the EPC solenoid, the processor looks at allot of different inputs to command the solenoids, such as Throttle Position Sensor, Vehicle Speed Sensors, Transmission Range Sensor and RPM signal, The PCM controls the shift patterns for the transmission. Electronic Pressure Control (EPC) Solenoid
The electronic pressure control (EPC) solenoid is located on the main control valve body and is controlled by the PCM. The EPC controls line pressure used to apply and release clutches and bands in the transmission.
The 2-3 shift solenoid is located on the main control valve body and is switched on and off by electrical signals from the PCM. The 2-3 shift solenoid activates the 2-3 shift valve which controls the automatic shifting between second and third gear. Second gear is established when the 2-3 shift solenoid is switched on. The 2-3 shift solenoid is switched off when vehicle speed increases and requires a second to third gear upshift.
The 3-4 shift solenoid is located on the main control valve body and is switched on and off by electrical signals from the PCM. The 3-4 shift solenoid activates the 3-4 shift valve which controls the automatic shifting between third and fourth gear. Third gear is established when the 3-4 solenoid is switched off. The 3-4 shift solenoid is switched on when vehicle speed increases and requires a third to fourth gear upshift.

change the coded solenoid and the reset the ECM and after a few days read the fault codes again

You need to troubleshoot the transmission solenoid shifts.You are a OBD1. Feedback on the transmission.So in your case there will be no data to be read. This is not uncommon for the shift solenoid B to supply little oil When this happens Solenoid A does not shif to fourth. You basically have a shift solenoid that cannot hold pressure. A good remedy is change transmission filter and fluid. This can help.Other than that solenoid will be needed.

There are a few solinoid packs that could be faulty, your best move would be get it to a trans shop to be tested and repaired correctly. further driving will only do more damage.

transmission shifter module. could also be the final shifter solenoid.

CHECK TRANSMISSION FLUID LEVEL SOUND LOW.TRANSMISSION FLUID + FILTER SHOULD BE CHANGED AT 30000 MILES..IF ALL IS GOOD.TRANSMISSION SHIFT VALVE ADJUSTMENT CORRECT.HAVE CAR SCANNED FOR TRANSMISSION FAULT CODES FOR FAULTY SHIFT SOLENOID OR PRESSURE SOLENOID AND TRANSMISSION RANGE SENSOR.

Shifting Solenoid might need to be replaced.