GM Full-Size Trucks 1988-1998 Repair Information

Adjustments

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Shift Linkage

See Figures 1, 2, 3 and 4

  1. Raise and support the front end on jackstands. Block the rear wheels.
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Fig. Fig. 1: Shift linkage-THM 400 and THM 700R4 transmissions



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Fig. Fig. 2: Shift positions-THM 400 and THM 700R4 transmissions



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Fig. Fig. 3: Shift linkage-4L60E and 4L80E transmissions



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Fig. Fig. 4: Shift positions-4L60E and 4L80E transmissions

  1. Loosen the shift lever bolt or nut at the transmission lever so that the lever is free to move on the rod.
  2.  
  3. Set the column shift lever to the neutral gate notch, by rotating it until the shift lever drops into the Neutral gate. Do not use the indicator pointer as a reference to position the shift lever, as this will not be accurate.
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  5. Set the transmission lever in the neutral position by moving it clockwise to the park detent, then counterclockwise 2 detents to neutral.
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  7. Hold the rod tightly in the swivel and tighten the nut or bolt to 17 ft. lbs. (23 Nm) on all but the 4L80E transmission. On the 4L80E transmission, tighten the bolt to 20 ft. lbs. (30 Nm).
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  9. Lower the vehicle.
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  11. Move the column shifter to park and check that the engine starts. Check the adjustment by moving the selector to each gear position.
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