1991 Pontiac Firebird Formula, 5.0 F, Standard, M39FACTORY OEM SERVICE PROCEDURE

Valve Body: Installation

  1. Coat check balls with petroleum jelly. Install check balls in proper locations on separator plate. See Figure . Install manual valve link. Ensure manual valve link is properly seated in manual valve. See Figure . Improper positioning may prevent vehicle operation in "D" range.
    NOTE: Improper positioning of throttle valve link will result in erratic shift points or high main line oil pressure.
  2. Install throttle link. Ensure link is properly positioned with lower hook facing outside of transmission case. See Figure . Install valve body and retaining bolts. Tighten bolts to specification. To complete installation, reverse removal procedure.
  3. Lubricate oil filter "O" ring with ATF before installation. Tighten all bolts to specification. See TORQUE SPECIFICATIONS  . Fill transmission with fluid.
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When to See a Mechanic

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

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

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