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Hello everyone, friends, in this video I will tell you how the ZF Meritor gearbox should work CORRECTLY when shifting from higher to lower gears.
The client complained about the gearbox, namely, the gears were flying out while driving.
During inspection and diagnostics, it was revealed that the factory five-pin relays were NOT installed; in addition, they were not connected correctly.
I restored the factory connection of the electrical wiring of the switch knob to the high-low, inside of which a special trigger relay is installed; it is necessary so that the supply of the plus signal to the solenoids is not interrupted when the gear is engaged, but at the same time, the switching is performed only when the rocker is in neutral position and the neutral sensor sends an enabling signal to the trigger