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Home >> GMC >> 1987 >> Forward Control 5.7 K, Automatic, 400/M40 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Overhaul - THM 400 >> Transmission Reassembly >> Rear Servo

Rear Servo

  1. Before installing servo, check band apply pin. See BAND APPLY PIN SELECTION CHECK under FRONT & REAR SERVO ASSEMBLY  under TRANSMISSION DISASSEMBLY. Ensure rear band apply lug is aligned with servo pin bore in transmission case.
  2. Lubricate servo bores with transmission fluid. Install rear accumulator spring in servo inner bore. Install rear servo assembly. Ensure it seats properly in bore. With servo depressed, install gasket and cover. Tighten attaching bolts.
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