AT-26 AUTOMATIC TRANSMISSION — Road Test [DIAGRAM: Gear selector showing D range with "Abnormal Noise Vibration" label and "OD" and "LU" indicators] A70172 (c) Run in the OD gear of the "D" range and with the lock-up in operation, and check for abnormal noise or vibration. NOTE: Check for cause of abnormal noise and vibration must be made with extreme care as they could also be due to unbalance in the propeller shaft, differential, tire, torque converter, etc. or insufficient bending rigidity, etc., in the power train. [DIAGRAM: Gear selector showing D range, OD, 3rd, 2nd positions with corresponding shift pattern graph showing 2nd, 2nd 3rd, 3rd, and OD shift points] A70173 (d) While running in "D" range 2nd, 3rd gears and OD, check to see that the possible kick down vehicle speed limits for 2 → 1, 3 → 1, 3 → 2, OD → 3 and OD → 2 kick-downs conform to those indicated on the automatic shift diagram. (e) Check for abnormal shock and slip at kick-down. [DIAGRAM: Two gear selectors showing D range shifting to "2" range, with "Engine Braking" label] A70174 (f) While running in "D" range OD gear, shift to "2" and "L" ranges and check the engine braking effect at each of these ranges. EVALUATION (1) If there is no engine braking effect at "2" range: • Brake No. 1 is defective (2) If there is no engine braking effect at "L" range: • Brake No. 3 is defective 2. "2" RANGE TEST, WITH NORM AND PWR PATTERNS Shift into "2" range and while driving with the accelerator pedal held constant at specified point (throttle valve opening 50 % and 100 %) and push in of the pattern selectors, check on the following points. (a) At each of the above throttle openings, check to see that 1 → 2 up-shift take place and also that the shift points conform to those shown on the automatic shift diagram. NOTE: There is no OD and no lock-up in "2" range. [DIAGRAM: Simple graph showing shift pattern] A70181 (b) While running in "2" range, 2nd gear, release the accelerator pedal and check the engine braking effect. [DIAGRAM: Gear selector showing "2" range with "2nd" and "1st" indicators, and engine braking symbol] A70175