Fig. 3.58. Position of torque converter clutches
The engine crankshaft speed on a fully braked vehicle in the "D" and "R" ranges is greater than the nominal value:
- low pressure in the hydraulic control system;
- slippage of the first gear and reverse gear brakes.
The engine crankshaft speed on a fully braked vehicle is higher than the nominal value only in the "D" range:
- slippage of the downshift clutch.
The engine crankshaft speed on a fully braked vehicle only in the "R" range is greater than the nominal value:
- slippage of the reverse clutch.
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The engine crankshaft speed on a fully braked vehicle in the "D" and "R" ranges is less than the nominal value:
- the torque converter is faulty;
- insufficient (inadequate) engine output power.