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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Removal & Installation - A/T >> Automatic Transmission >> Astro, Safari, "C", "G", "K", "R", "S" "T" & "V" Series >> Removal (Hydra-Matic 4L60/THM 700-R4)

Removal (Hydra-Matic 4L60/THM 700-R4)

  1. Open hood and disconnect negative battery cable. Remove air cleaner. Disconnect TV cable from throttle linkage. Raise vehicle. Drain transmission fluid. Disconnect shift linkage at transmission. Remove drive shaft.
  2. Remove transmission support bracket attaching bolts at converter. Position transmission jack under transmission and raise slightly. Remove transmission crossmember-to-mount bolts, crossmember-to-frame bolts and vibration damper (if equipped). Slide crossmember rearward and remove from vehicle.
    CAUTION: When lowering transmission to gain clearance for additional component removal, use care not to stretch or damage transmission lines, cables or wires.
  3. Remove dipstick tube and seal. Cap openings. Disconnect speedometer cable at transmission. Disconnect vacuum modulator line (if equipped). Disconnect all electrical leads at transmission and electrical harness clips on transmission. Disconnect oil cooler lines and cap openings.
  4. Disconnect transfer case shifter and move aside. Note location of transmission support brackets before removal for reassembly reference. Remove transmission support braces. Remove torque converter cover and mark flywheel and torque converter to maintain original balance. Remove torque converter-to-flywheel bolts.
  5. Support engine and remove transmission-to-engine bolts. Disconnect transmission assembly, being careful not to damage any cables, lines or linkage. Install Torque Converter Holding Strap (J-21366) and remove transmission from vehicle.
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