ATP Automatic Transmission Ring Gear,Clutch Flywheel Ring Gear ZA-539
ATP Automatic Transmission Ring Gear,Clutch Flywheel Ring Gear ZA-539

ATP Automatic Transmission Ring Gear,Clutch Flywheel Ring Gear P/N:ZA-539

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$46.99
MPN: ZA-539
UPC: 740993024101
Item Package Quantity: 1
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ATP Automatic Transmission Ring Gear,Clutch Flywheel Ring Gear P/N:ZA-539
ATP Automatic Transmission Ring Gear,Clutch Flywheel Ring Gear P/N:ZA-539
$46.99

Give the starter fresh teeth to engage with the ATP clutch flywheel ring gear ZA-539, the toothed ring that meshes with the starter motor so the engine can crank and start. It fits many Ford and Mercury models, including the 1964-1970 Ford Mustang and 1968-1970 Ford Bronco.

  • Cranks the engine: the ring gear's teeth engage the starter motor pinion, turning the flywheel to spin the engine over for starting.
  • Replaceable wear part: repeated starter engagement eventually wears or breaks the teeth; once that's diagnosed, the ring gear must be replaced.
  • 12/14 pitch, no chamfer: built with a 12/14 flywheel pitch and no ring gear chamfer.
  • Fit and function: designed to fit and function like the original for durability and long life.

Listed applications include all-engine fitments as well as the L6-2.4L, L6-2.8L, L6-3.3L, L6-3.6L and L6-3.7L engines. Country of origin: Korea, Republic of. See the Buyer's Guide tab for the full list of applications.

Interchange: FRG-132F
132F · RG132F · XG56 · FM132F · 4477 · C0DP6384A · RG55 · FRG132F · 416119

This part cross-references / interchanges with the following part numbers:

132F, RG132F, XG56, FM132F, 4477, C0DP6384A, RG55, FRG132F, FRG-132F, 416119

Frequently Asked Questions

What does the ATP clutch flywheel ring gear ZA-539 do?

Its teeth mesh with the starter motor pinion so the flywheel turns and the engine cranks over to start.

What are the signs the ring gear needs replacing?

Grinding, a starter that spins without turning the engine, or an intermittent no-crank can point to worn or broken ring gear teeth. Diagnose the cause before replacing, since the starter can also be at fault.

Does it fit a 1964-1970 Ford Mustang?

Yes, ZA-539 is listed for the 1964-1970 Ford Mustang with all engines. Check the Buyer's Guide tab to confirm your exact vehicle.

What is the pitch?

It's built with a 12/14 flywheel pitch and no ring gear chamfer.

Where is it made?

Country of origin: Korea, Republic of.

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