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The ATP ZA-502 Flywheel Ring Gear is engineered as a durable, OE-quality replacement for manual transmission Ford and Mercury applications. Manufactured with precision-machined teeth and heavy-duty construction, this ring gear restores reliable starter engagement and long-term rotational performance. Designed to fit a wide range of classic Ford and Mercury cars, trucks, and vans from the 1960s and 1970s, it provides a perfect solution for restoration, repair, or drivetrain maintenance.
OEM-GRADE CONSTRUCTION – Built from high-strength steel for long service life and consistent performance.
PRECISION MACHINED TEETH – Ensures smooth and reliable starter engagement.
DIRECT-FIT REPLACEMENT – Matches factory specifications for proper fitment on compatible flywheels.
HIGH HEAT RESISTANCE – Designed to withstand repeated starter impacts and extreme operating temperatures.
RESTORATION FRIENDLY – Ideal for vintage Ford & Mercury vehicles where original parts are no longer available.
Econoline (1967)
Custom (1965–1966, 1968–1971)
Torino (1968–1971)
Thunderbird (1965–1971)
Ranchero (1967–1971)
Ranch Wagon (1965–1971)
P-350 (1972–1973)
Mustang (1967–1971)
M-450 (1974)
LTD (1965–1971)
Galaxie 500 (1965–1971)
Galaxie (1965–1967)
Fairlane (1965–1970)
E-300 / E-200 / E-100 Econoline (1969–1974)
Custom 500 (1968–1971)
Country Squire (1965–1971)
Country Sedan (1965–1971)
Club Wagon (1966–1967)
Bronco (1967)
F-350 (1965–1976)
F-250 (1965–1976)
F-150 (1975–1976)
F-100 (1965–1976)
Villager (1965–1967)
Voyager (1966–1967)
Park Lane (1965–1968)
Monterey (1965–1970)
Montego (1968–1970)
Montclair (1965–1968)
Marquis (1967–1970)
Marauder (1965–1967, 1969–1970)
Cyclone (1965–1970)
Cougar (1967–1970)
Commuter (1965–1968)
Comet (1965–1969)
Colony Park (1964–1970)
Caliente (1965–1967)
Brougham (1967)
Linecode: ATP4
Pitch Flywheels: 12/14
Ring Gear Chamfer: None
Inside Diameter: 14.21 in
Outside Diameter: 15.503 in
Thickness: 0.375 in
Tooth Count: 184
Country of Origin: MX
Harmonized Codes: 8483409000 (HTS & Schedule B)
UPC: 00740993023739
VMRS Code: 027001017
Heating of the ring gear (per OE procedure) is typically required for proper installation.
Inspect flywheel surface and starter drive gear for wear before replacement.
Always verify tooth count and dimensions match existing flywheel to ensure compatibility.
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
