A/T Speedometer Gear - Installation Precaution

84ford10

Article No. 84-17-12


TRANSMISSION - AUTOMATIC - ATX
- SPEEDOMETER OR GOVERNOR DRIVE GEAR DAMAGE


FORD 1981-84 ESCORT, EXP, TEMPO

LINCOLN-MERCURY 1981-84 LYNX, LN7, TOPAZ

Driving the speedo gear and retainer assembly too far into the case can damage the drive (17285) gear and its mating components (i.e., speedo driven gear [17281] and governor driven gear [7F419]), because it allow the retainer to contact the drive gear (17285) teeth. Misalignment of the retainer into the case may also allow the retainer to extend too far into the case and contact the drive gear. Either of the above conditions can result in damage or premature wearing of the speedometer and governor gears. The result is a loss of speedometer speed control or governor function. If either driven gear is replaced, then the drive gear and the other driven gear should be inspected and replaced if necessary. Governor driven gears that exhibited an "hour glass" wear pattern will require the entire governor gear assembly (7C053) to be replaced due to possible internal damage.

Additionally, some vehicles have a speedometer gear with a plastic stem where the speedometer cable is inserted that extends past the end of the retainer. Tapping on the extended plastic end of the speedometer gear may cause distortion of the stem and inhibit speedometer cable installation.

FIGURE 11:

The recommended procedure for installation of the speedometer gear and retainer assembly is as follows:

1. Lightly lubricate the O-ring seal on the speedo driven gear retainer with a thin film of grease.
2. Align the relief in the retainer with the retaining pin hole in the case (Figure 11).

CAUTION: TAPPING DIRECTLY ON THE SPEEDOMETER GEAR ASSEMBLY MAY CAUSE DAMAGE TO THE PLASTIC DRIVEN GEAR.
3. Place the socket required for installation and removal of the engine oil pressure sending unit (Proto tool #6524), or equivalent, on the gear and retainer assembly.
NOTE: The socket size and chamfer matches the case bore. Failure to use the recommended socket will affect the retainer position, causing potential repeat service.

FIGURE 12:

4. Tap the socket until it makes contacts against the case bore (Figure 12).
5. Verify that the retainer relief has maintained alignment with the retaining pin hole.

FIGURE 13:

6. Tap the retaining pin into the case (Figure 13).
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"