ATP Parts FS-1 Flywheel Shim

Brand ATP Parts FS-1
Inside Diameter 1.1875
Thickness 0.040
Outside Diameter 2.3125
Contents or Additional Details Note: outer diameter measurement does not include teeth
LineCode Atp4
Part Width 0.040"
Fits Ford, Mercury, and Scion · 135 vehicles

Easy installation. Restores machined flywheel height with a simple shim fit.

Precision thickness. 0.040 in. helps take up excessive clearance.

Transmission hardware. A flywheel shim for manual and automatic applications.

Cross-references Pioneer Automotive Industries FWS-14 and FWS14 for the same application. See all 2.

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ATP FS-1 Flywheel Shim Overview

ATP Parts FS-1 is a flywheel shim used to restore proper flywheel height on manual transmission applications and to correct excessive clearance in automatic transmission setups. With a 0.040" thickness, 2.3125" outside diameter, and 1.1875" inside diameter, it is built for precise spacing where drivetrain measurements matter.

Compatible With Ford Ranger, Ford Mustang, Ford Explorer, Ford Aerostar, and other listed applications, the FS-1 supports accurate flywheel and torque converter spacing across a wide range of Ford, Mercury, and Scion vehicles.

Key Features

  • Part number: FS-1
  • 0.040" thickness for measured spacing correction
  • 2.3125" outside diameter and 1.1875" inside diameter
  • Restores machined manual transmission flywheel height
  • Helps take up excessive clearance in automatic transmission applications
  • Outer diameter measurement does not include teeth
  • Cross-reference: Pioneer Automotive Industries FWS-14

Detailed Product Description

The ATP FS-1 flywheel shim is a precision hardware component for drivetrain setup and clearance correction. In manual transmission service, it restores a machined flywheel to the proper height. In automatic transmission applications, it takes up excess clearance caused by engine crankshaft endplay or by installing a rebuilt torque converter or rebuilt front pump. This makes the FS-1 a practical choice when servicing Ford Ranger, Ford Mustang, Ford Explorer, and other listed fitments.

Fits 1986-2011 Ford Ranger, 2005-2010 Ford Mustang, 1991-2003 Ford Explorer, and additional Ford, Mercury, and Scion applications listed in the fitment data. This part cross-references Pioneer Automotive Industries FWS-14 for the same application.

What It Helps Address

  • Incorrect flywheel height after machining
  • Excessive drivetrain clearance from crankshaft endplay
  • Clearance changes after installing a rebuilt torque converter
  • Clearance changes after installing a rebuilt front pump
  • Spacing issues during manual transmission or automatic transmission service

Installation Notes and Tips

  • Verify inside diameter, outside diameter, and thickness before installation.
  • Confirm the application-specific notes, including 6-bolt crank and 8-bolt crank exclusions where listed.
  • Use the fitment notes for the exact vehicle configuration, especially on Ford Mustang, Ford Explorer, and Ford Ranger applications.
  • Measure the mating surfaces and clearance before final assembly to confirm the shim thickness is correct.

Quality Assurance

ATP Parts manufactures this shim to match the dimensional requirements listed for the application. The FS-1 is specified with exact measurements to support accurate drivetrain setup across the confirmed vehicle fitments.

This part fits 135 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersPositionNotes
2011FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2011ScionxD—1.8LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2010FordMustang—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; Exc. 8-Bolt Crankshaft
2010FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2010ScionxD—1.8LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2009FordMustang—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; Exc. 8-Bolt Crankshaft
2009FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2009ScionxD—1.8LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2008FordMustang—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; Exc. 8-Bolt Crankshaft
2008FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2008ScionxD—1.8LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2007FordMustang—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; Exc. 8-Bolt Crankshaft
2007FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2006FordMustang—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; Exc. 8-Bolt Crankshaft
2006FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2005FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
2005FordExplorer Sport Trac—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
2005FordMustang—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; Exc. 8-Bolt Crankshaft
2005FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2005MercuryMountaineer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
2004FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
2004FordExplorer Sport Trac—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
2004FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2004MercuryMountaineer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
2003FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2003FordExplorer Sport Trac—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2003FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2003MercuryMountaineer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
2002FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2002FordExplorer Sport Trac—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2002FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2002MercuryMountaineer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
2001FordExplorerXLT4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2001FordExplorerXLS4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2001FordExplorerPostal4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2001FordExplorerLimited4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2001FordExplorerEddie Bauer4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2001FordExplorer Sport Trac—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2001FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2001MercuryMountaineer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
2000FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2000FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
2000MercuryMountaineer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
2000MercuryMystique—2.0LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1999FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1999FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1999MercuryMountaineer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1999MercuryMystique—2.0LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1998FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1998FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1998MercuryMountaineer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1998MercuryMystique—2.0LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1997FordAerostar—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1997FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1997FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1997MercuryMystique—2.0LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1996FordAerostar—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1996FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1996FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1996MercuryMystique—2.0LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1995FordAerostar—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1995FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1995FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1995MercuryMystique—2.0LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1994FordAerostar—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1994FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1994FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1993FordAerostar—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1993FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1993FordFestiva—1.3LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1993FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1992FordAerostar—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1992FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1992FordFestiva—1.3LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1992FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1992FordRanger—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1991FordAerostar—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1991FordExplorer—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1991FordFestiva—1.3LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1991FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1991FordRanger—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1990FordAerostar—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1990FordBronco II—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1990FordFestiva—1.3LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1990FordRanger—4.0LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1990FordRanger—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1989FordBronco II—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1989FordRanger—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1988FordBronco II—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1988FordFestiva—1.3LL4N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1988FordRanger—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1987FordBronco II—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1987FordRanger—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1986FordAerostar—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1986FordBronco II—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1986FordRanger—2.9LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1985FordBronco II—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1985FordRanger—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1984FordBronco II—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1984FordRanger—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1983FordRanger—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1979FordMustang—3.3LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1979FordMustang—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1979FordPinto—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1979MercuryBobcat—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1979MercuryCapri—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1978FordPinto—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1978MercuryBobcat—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1977FordPinto—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1977MercuryBobcat—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1977MercuryCapri—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1976FordPinto—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1976MercuryBobcat—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1976MercuryCapri—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1975FordPinto—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1975MercuryBobcat—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1974MercuryCapri—2.8LV6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1972FordBronco—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1971FordBronco—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1971FordE-100 Econoline—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1970FordBronco—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1970FordE-100 Econoline—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1969FordBronco—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1969FordE-100 Econoline—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1968FordBronco—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1967FordBronco—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1966FordBronco—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1966FordEconoline—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1965FordEconoline—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1965FordMustang—3.3LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1965FordMustang—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"
1964FordEconoline—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1964FordMustang—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1963FordEconoline—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
1962FordEconoline—2.8LL6N/AWidth: 0.040"; Outer Diameter: 2.3125"; Inner Diameter: 1.1875"; 6 Bolt Crank
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Pioneer Automotive Industries — FWS-14FWS14