Removal

This procedure involves removal, disassembly and assembly of the A500 transmission overdrive unit.

Before raising the vehicle, place the gear shift selector in park.

1. To start the overdrive removal, remove the transmission oil pan, remove the gasket, drain the oil and, using a new gasket, reinstall the pan. If there is a failure within the overdrive unit or if the fluid is contaminated, then remove the entire transmission. If the diagnosis indicates clutch or governor problems only, then remove only the overdrive unit.

FIGURE 5:

2. Index the drive shaft universal joint to the pinion yoke for proper orientation during reassembly. Then remove the drive shaft (Figure 5).
3. Using a transmission jack, support the transmission and raise it enough to remove the cross member. Mark the position of the crossmember for exact reassembly.

4. Remove the speedometer cable.

FIGURE 6:

5. Remove the seven bolts securing the overdrive to the transmission (Figure 6).
6. Very carefully pull the unit off of the intermediate shaft. A bearing and a select spacer may be either on the overdrive piston on the rear of the main case, on the sliding hub, or on the intermediate shaft.

NOTE: ONCE THE OVERDRIVE UNIT IS PULLED BACK APPROXIMATELY 1", IT IS FREE TO FALL IF IT IS UNSUPPORTED.

7. Place several clean shop towels on a bench.

Tip the unit so that any excess oil drains. Watch for any sign of abnormal wear, such as clutch material or metal fragments in the oil.