Speedometer Gear, A/T: Service and Repair

SPEEDOMETER PINION GEAR
NOTE: Any time the speedometer pinion adapter is removed, a NEW "0" ring (black in color) must be installed on the outside diameter of the adapter.Removal and installed on Rear axle gear ratio and tire size determines pinion gear size requirements. Refer to "Speedometer Pinion Chart" in Specifications for pinion usage.






(1) Remove bolt and retainer securing speedometer pinion adapter in the extension housing (Fig. 1).
(2) With cable housing connected, carefully work adapter and pinion out of the extension housing.
(3) Remove the pinion retainer from the pinion and remove the pinion from the adapter.
(4) If transmission fluid is found in cable housing, install a new speedometer pinion and seal assembly.






(5) If transmission fluid is found leaking between the cable and adapter, replace the small "0" ring on the cable. Remove the speedometer cable retainer from the adapter and remove the adapter from the cable. Replace the small "O" ring (Fig. 2).
(6) Install the adapter on the cable and install the cable retainer on the adapter. Be sure the retainer is properly seated in the groove.
(7) Install pinion on adapter with a new large "0" ring (black in color) and install pinion retainer on pinion. Before installing pinion, adapter, and cable assembly make sure adapter flange and its mating areas on extension housing are clean. Dirt or sand will cause misalignment resulting in speedometer pinion gear damage.






(8) Rotate the speedometer pinion gear and adapter assembly so that the number on the adapter, corresponding to the number of teeth on the gear, is in the 6 o'clock position as the assembly is installed (Fig. 1).
(9) Install retainer and bolt, with retainer tangs in adapter positioning slots. Tighten retainer bolt to 100 in. lbs. (11 N.m).