Troubleshooting the automatic transmission is simplified by using the proven method of diagnosis. One of the most important things to remember is that there is a definite procedure to follow. Do not take short cuts or assume that critical checks or adjustments have already been made.

The following procedures are recommended for checking and/or verifying that the various components are adjusted and operating properly. Use Rotunda Automatic Transmission Tester 014-00737 or equivalent. Follow the manufacturer's instructions.

Stall Test

The stall test checks converter clutch operation and installation, the holding ability of the forward clutch, reverse clutch the low/reverse bands, the planetary one-way clutch, and engine performance.

Conduct this test with the engine coolant and transmission fluid at proper levels and at operating temperature and with the TV linkage set properly.

Apply the service and parking brakes firmly for each stall test.

1. Find the specified stall rpm for the vehicle by referring to the Special Specifications booklet. Use a grease pencil to mark the rpm on the dial of a tachometer.

2. Connect tachometer to engine.

   NOTE: If the engine speed recorded by the tachometer exceeds the maximum limits given in the Special Specifications booklet, release the accelerator immediately because clutch or band slippage is indicated.

3. In each of the following ranges: (D), D, 1, R, press the accelerator to the floor and hold it just long enough to let the engine get to full rpm. While making this test, do not hold the throttle open for more than five seconds at a time.

4. Note the results in each range.

5. After each range, move the selector lever to NEUTRAL and run the engine at 1000 rpm for about 15 seconds to cool the converter before making the next test.

6. Refer to the following chart for corrective actions.
   
   

   Selector Position	Stall Speeds High	Stall Speeds Low
   Overdrive and D	Planetary One-Way Clutch
   Overdrive, D and 1	Forward Clutch
   Overdrive, D, 1 and R	General Problems Pressure Test. Check TV Cable Adjustment if Not Done Prior to Test	Converter Stator One-Way Clutch or Engine Performance
   R	Reverse Clutch or Low/Reverse Band or Servo