Service manual page AT-66 with automatic transmission stall test…
Scanned service-manual page AT-66 titled "Trouble-Shooting and Diagnoses — Stall Testing (Cont'd)," laying out a stall test analysis flowchart for an automatic transmission. Branches cover "D" and "R" range tests with too-high/too-low stall speeds pointing to forward clutch, one-way clutch, high-reverse clutch and lock-up converter faults.
Stall 'Testig (Contid) STALL TEST ANALYSIS NG. Stall revolurion is O.K. R range test , Stall revolution is Too hlgh Too ICM Forward clutch (hear) a! Lockvup clutch is dragging, Too high Too low one-way clutch slips converter Cine-way clutch IS faulty (slipping). or engine 6 is not performing properlv- High-reverse clumh Lockup Elulch is (lagging f (Front) or low & rev. Convener pneway clutch Is 1 WE , . . brake slips fauly (slippingL or engine is net perfurming properly. on? One~wav Clutch slips rm. Forward clutch (Rear) slips (From) or low & slips Perform road tests [0 determine whether highvreverse cluxch , rev. brake When shift selecx lever |S in "1" range No engine braking Luw Br rev. brake slips Eecxive engine braking High-reverse clutch (Front) slips If converter one-way clutch is frozen, vehicle will have poor high speed performance If converter one-way clutch is slipping, vehicle will be sluggish up to 50 or 60 km/h (30 or 40 MPH). AT66
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