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HOMESERVICE MANUALSFORD1991TAURUS L, 4D SEDAN, 3.8 4REPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSOVERHAUL - ATX/FLCCOMPONENT DISASSEMBLY & REASSEMBLYDIFFERENTIAL ASSEMBLYDIFFERENTIAL BEARING PRELOAD ADJUSTMENT
1991 Ford Taurus L, 4D Sedan, 3.8 4

Differential Bearing Preload Adjustment

1991 Ford Taurus L, 4D Sedan, 3.8 4SECTION Differential Bearing Preload Adjustment
  1. Differential bearing preload is set at factory and need not be checked or adjusted unless one of the following parts are replaced:
    • Transaxle Case
    • Differential Case
    • Differential Bearings
    • Differential Bearing Retainer
  2. To adjust preload, install differential assembly into transaxle case. Place Shim Spacer (T83P-4451-BH) on differential ball bearing outer race. Thickness of spacer should be .054-.055" (1.37-1.40 mm).
  3. Remove bearing retainer oil seal and "O" ring. Install bearing retainer in case. Install Differential Bearing Preload Shim Selector (T81P-4451-A) in differential retainer.
  4. Ensure tool is centered in differential seal bore. Position gauge bar of selector tool across bearing retainer and install 2 attaching bolts finger tight. See Fig 1 .
  5. Tighten center screw of gauge bar finger tight, then rotate differential assembly several times to seat bearings. Retighten screw finger tight.
    Fig 1: Installing of Differential Bearing Preload Tool
    G92E14054Courtesy of FORD MOTOR CO.
  6. Using a feeler gauge, measure clearance between bearing retainer and transaxle case at 3 positions around retainer. Add the 3 measurements together and divide by 3 to obtain average of all measurements.
  7. To determine shim needed for correct bearing preload, subtract average measurement obtained in step 6) from .053" (1.35 mm). Then add compressed gasket thickness of .011" (.28 mm). Result is thickness of required preload shim to install.
    NOTE: Bearing preload shims are available in thickness of .012-.051" (.30-1.30 mm) in various increments. If calculations result in shim thickness which falls between 2 available thicknesses, always use thinner shim. See BEARING PRELOAD SHIMS  table.
    BEARING PRELOAD SHIMS

    Part No. Thickness
    E3FZ4076-A .012" (.30 mm)
    E3FZ4076-B .014" (.35 mm)
    E3FZ4076-C .016" (.40 mm)
    E3FZ4076-D .018" (.45 mm)
    E3FZ4076-E .020" (.50 mm)
    E3FZ4076-F .022" (.55 mm)
    E3FZ4076-G .024" (.60 mm)
    E3FZ4076-H .026" (.65 mm)
    E3FZ4076-J .028" (.70 mm)
    E3FZ4076-K .030" (.75 mm)
    E3FZ4076-L .031" (.80 mm)
    E3FZ4076-M .033" (.85 mm)
    E3FZ4076-N .035" (.90 mm)
    E3FZ4076-P .037" (.95 mm)
    E3FZ4076-R .039" (1.00 mm)
    E3FZ4076-S .041" (1.05 mm)
    E3FZ4076-T .043" (1.10 mm)
    E3FZ4076-U .045" (1.15 mm)
    E3FZ4076-V .047" (1.20 mm)
    E3FZ4076-W .049" (1.25 mm)
    E3FZ4076-X .051" (1.30 mm)
  8. Remove gauge bar, shim spacer and bearing retainer. Install new oil seal in retainer Position shim on ball bearing outer race. Install bearing retainer with new "O" ring by tapping evenly around outside edge of retainer face. Dip "O" ring in transmission fluid prior to installation.
  9. Loctite bolt threads and install differential bearing retainer-to-case attaching bolts. Tighten bolts to specifications. See TORQUE SPECIFICATIONS  .
RENDER: 1.0x

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