Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSPONTIAC1987GRAND PRIX BROUGHAM, 5.0 HREPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSOVERHAUL - 200-4RTESTINGROAD TESTDOWNSHIFT FROM DRIVE TO "L2"
1987 Pontiac Grand Prix Brougham, 5.0 H
Downshift From Drive To "L2"
1987 Pontiac Grand Prix Brougham, 5.0 HSECTION Downshift From Drive To "L2"
Place selector lever in Drive. Moving at approximately 50 MPH with closed throttle, move selector lever to "L2". Transmission should downshift to 2nd gear. An increase in engine RPM and an engine braking effect should be noticed.
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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.