The main difference of the RE4F03A from the RE4F03B lies in solenoids, engineers also upgraded the valve body. There is also some difference between holes for solenoids in the abovementioned trasmissions.
What are you looking for?
Overhaul Kit
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Friction Kit
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Friction
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Steel Plate
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Steel Kit
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Band
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Solenoid Kit
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Solenoid EPC
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Solenoid TCC
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Pump
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Shaft
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Drum
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Valve body
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Torque converter
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Hub
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Piston
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Piston Kit
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Planetary Gear
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Filter
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Gasket
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Bushing
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Seal
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Bearing
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Pressure Plate
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Stator
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Differential
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Retainer
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Inhibitor Switch
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Instruction manual
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TOOLS & ACCESORIES
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Sensor