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.
1977 Ford Bronco Automatic TransFACTORY OEM SERVICE PROCEDURE
System Precautions
- Silicone dielectric grease must be applied to all insulating areas at distributor, coil, and spark plug boots. A 3/4" clearance must be maintained at distributor cap mounting edge, spark plug wire terminals, and coil tower, to prevent high voltage arcing to ground.
- To help prevent radio frequency interference, coat the entire brass rotor tip with silicone dielectric grease to a thickness of about 1/8". Do not remove this grease if discolored, because the grease will maintain its insulating properties.
- When replacing spark plug wires, insure wire made of the same material is used for replacement. Silicone/Silicone wire can be identified by the letters "SS" appearing on the wire in White lettering. Silicone/EPDM wire can be identified by the letters "SE" appearing on the wire in Black lettering. The "SS" wire is used on cylinders subject to very high engine temperatures.
Factory Service Tools
Use the Manual With the Right Hardware
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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.