If replacing the speed sensor bearing https://en.tradebearings.com/ didn't solve it, then the problem may be further upstream in the traction feedback circuit rather than the bearing itself. On Raymond trucks, codes like 6W and 57 are often tied to motor speed signal faults, encoder issues, damaged wiring, poor connector contact, or controller communication problems, especially if the truck runs briefly before faulting out. Since it worked previously and now fails consistently after startup, I'd start checking the encoder wiring harness, connector pins, grounding, and any moisture or corrosion around the traction motor and controller before assuming the new bearing or sensor is bad, because those signal "bearings" are just as critical as the mechanical components themselves.