Vehicle Fitment

Make	Model	Year
Ford	Bronco	1977
	Country	1963-1964, 1987-1991
	E-series	1983, 1985-1996
	F-100	1977-1979
	Fairlane	1962-1967, 1969-1970
	Falcon	1963-1967, 1970
	Galaxie	1963-1964
	Granada	1975-1980
	LTD	1977-1982, 1984-1991
	Maverick	1970-1977
	Mustang	1964-1967, 1969-1973, 1979, 1982-1995
	Ranch Wagon	1963-1964
	Ranchero	1978-1979
	Thunderbird	1977-1981, 1983-1988, 1991-1993
	Torino	1969-1974
Mercury	Caliente	1964-1966
	Colony Park	1987-1991
	Comet	1963-1967, 1969, 1971-1977
	Cougar	1967-1968, 1977-1981, 1983-1988, 1991-1992
	Country Cruiser	1963
	Cyclone	1965-1967
	Grand Marquis	1979-1991
	Marquis	1979-1982
	Meteor	1962-1963
	Monarch	1975-1980
	Montego	1969-1973
	Villager	1963-1967
	Voyager	1966-1967
	Zephyr	1978-1979

Product Details

Flywheel Ring Gear (ZA-503) by ATP®. Flywheel Tooth Number: 157. Size: 12.025" ID, 13.294" OD. The ring gear has teeth which engage with the starter motor allowing the engine to crank over and start. Repeated engagement with the starter results in worn or broken ring gear teeth. Once this is diagnosed, the ring gear must be replaced. ATP ring gears are designed to fit and function just like the original part to ensure durability and long life.

Features

Manufactured to meet or exceed original equipment specs
Eliminates grinding from damaged teeth
Increases starter drive life

The primary purpose of the flywheel is to store kinetic energy and preserve the rotating inertia of the engine through its cycles. The flywheel ring gear is also engaged by the starter drive pinion to make the electric motor turns the crankshaft starting a vehicle. The dual mass flywheel is used to eliminate engine vibrations preventing premature gear wear. Proper operation of both flywheels are critical for high performance of the vehicle. If your flywheels, dual mass flywheels, or related parts such as flywheel bolts, shims, or ring gears are cracked or damaged, turn to ATP products. They are designed and manufactured to meet or exceed the highest OE standards for quality, fit, and function. Made of premium quality materials, the products ensure superior durability for long-lasting service life.

ATP® was founded in July, 1955, and is currently known as one of the market leaders of automotive products consumed by professionals and do-it-yourselfers. The company is located in the northern suburb of Chicago, Illinois. Operating out of its own 92,000 sq. ft. facility, ATP offers a comprehensive product line that includes automatic transmission filter kits, repair kits, exhaust manifold kits, harmonic balancers, timing covers, cables, flywheel and ring gears, interior vent filters, and chemicals. With its dedication to perfection, ATP provides its clients with products which ensure lasting value and lead industry standards and practices to "zero defects."

Brand:

ATP

Part Number:

ZA-503

UPC:

740993023746

Alternate MPN:

ZA503

OE Numbers:

C7OP6384A

Warranty

ATP Automotive Limited 1-Year Warranty

ATP warrants, to its direct purchaser only, any products sold by ATP to be free from defects in material and workmanship for a period of one (1) year from the date of sale to the original consumer purchaser. ATP's obligation under this warranty is expressly conditional on proper installation of the part and normal operation of the vehicle. ATP will replace or repair this product, if it has been proven to be defective within the one year warranty period.

ATP Driven Limited 5-Year Warranty: Applies to Front Differentials

ATP warrants, to its direct purchaser only, any products sold by ATP to be free from defects in material and workmanship for a period of five (5) years from the date of sale to the original consumer purchaser. ATP's obligation under this warranty is expressly conditional on proper installation of the part and normal operation of the vehicle. ATP will replace or repair this product, if it has been proven to be defective within the one year warranty period.

ATP Graywerks Limited Lifetime Warranty: Applies to Exhaust Manifolds, Intake Manifolds, Harmonic Balancers, Oil Pans, Transmission Pans and Timing Covers

ATP warrants, to its direct purchaser only, any products sold by ATP to be free from defects in material and workmanship under normal use (no off-road damage or racing use). ATP’s obligation under this warranty is expressly conditional on proper installation of the part and normal operation of the vehicle. ATP will replace or repair this product, if it has been proven to be defective.

ATP Graywerks Limited 5-Year/ 50,000-Mile Warranty – Manifold Catalytic Converters

ATP warrants that the catalysts in its converters are free from defects in material and workmanship which cause such catalysts to fail to conform to emission reduction requirements specified by the U.S. Environmental Protection Agency for a period of 50,000 miles or the California Air Resources Board for a period of five (5) years or 50,000 miles, as applicable, from the date of installation of said catalytic converter.

ATP warrants that the external shell, including manifold and end pipes shall be free from defects in material and workmanship for a period of five (5) years or 50,000 miles from the date of installation, whichever comes first.

This warranty is conditioned upon the converter being properly installed on the vehicle for which it is designated and cataloged and the said vehicle is maintained in proper operating condition according to original specifications.

ATP will replace or repair this product, if it has been proven to be defective within the five-year/50,000-mile warranty period.

Magnuson-Moss Warranty Act:

Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

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ATP® - Flywheel Ring Gear

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