The stall speed test validates the overall performance
of the transaxle and the engine by measuring the maximum engine speeds in
the forward and reverse ranges.
The stall speed should fall within 2000 to 2500 RPM in all tested gear
ranges. Refer to the Stall Speed Test Diagnosis for causes of higher or lower
stall speed.
Stall Speed Test Diagnosis
Stall Speed Test Results
| Road Test Results
| Probable Cause
|
Stall
Speed in All Gear Ranges Exceed Specified Limit
| No 1st gear or slippage in 1st
gear.
| Line pressure too low.
|
Stall Speed in Drive (D) and Second
(2) Ranges Exceed Specified Limit
|
• | 2nd and 3rd gear are normal. |
• | Slippage in drive (D) range 1st, 2nd and 3rd gears. Engine braking
occurs with throttle valve fully closed. |
• | Slippage in Second (2) range 1st and 2nd gears. Engine braking
occurs with throttle valve fully closed. |
|
• | One-way clutch slippage. |
• | One-way clutch slippage. |
|
Stall speed in Reverse
(R) Range Exceeds the Specified Limit
|
• | Engine braking does not function in the Low (L) range. |
• | Engine braking works in the L range |
|
• | 1st-reverse brake slippage. |
• | Direct clutch slippage. |
|
Stall Speed
Within Specifications
|
• | Vehicle speed will not exceed 50 km/h (50 mph).
This condition causes very high fluid temperatures. |
• | Slippage in drive (D) range 3rd gear. |
• | Slippage in drive (D) range 1-2 gear upshift. |
|
• | Torque converter one-way clutch seizure. |
• | Direct clutch slippage. |
• | 2nd brake band slippage. |
|