Over-Center Preload Torque Adjustment

1985 Chevrolet Suburban C10, 6.2 CSECTION Over-Center Preload Torque Adjustment
  1. Loosen adjuster screw lock nut. Back off adjuster screw until stopped, then turn in 1 full turn. Rotate input shaft from stop to stop counting number of turns. Turn shaft half way back to center position.
  2. Attach an INCH lb. torque wrench to input shaft. Turn shaft from side to side through specified arc on each side of center. See OVER-CENTER PRELOADΒ  chart. Note torque reading going over center. See Fig 1 .
OVER-CENTER PRELOAD INCH LBS.

Application Arc Over-Center (1) Total
New Gears 20Β° 6-10 (.7-1.1) 18
Used Gears (2) 20Β° 4-5 (.5-.6) 18
(1) Total preload is sum of thrust bearing and over-center preload.
(2) In service for more than 400 miles (640 km.).
Fig 1: Adjusting Over-Center Preload Adjust thrust bearing preload before over-center preload.
G30540
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.