Stall Speed Test
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Carry out the Line Pressure Test prior to the Stall Speed Test. If line pressure is low, do not carry out the stall test or additional transmission damage will occur. Do not maintain Wide Open Throttle (WOT) in any gear range for more than 5 seconds.
NOTE:
After testing each of the ranges, move the selector lever into the NEUTRAL position and run the engine at 1, 000 rpm for about 15 seconds to allow the torque converter to cool off before continuing onto the next range.
NOTE:
If the engine speed exceeds maximum specified rpm, release the accelerator pedal immediately.
NOTE:
Only perform the stall speed test with the engine and transmission at normal operating temperatures.
The Stall Speed Test checks the operation of the following items:
- Torque converter clutch stator
- A clutch
- B clutch
- C clutch
- D clutch
- E clutch
- F clutch
- Connect a scan tool.
- Press the accelerator pedal to WOT in each range. Record the rpm reached in each range. Stall speeds should be in the appropriate range.
Stall Speed
| Engine | Drive | Reverse |
|---|---|---|
| 3.5L | 3478-3845 rpm | 3478-3845 rpm |
| Test Results Possible Source | Possible Source |
|---|---|
| Stall speed high - R only | General line pressure concerns F clutch |
| Stall speed high - 1st and 3rd gears | E clutch |
| Stall speed high - Both 2nd and 3rd gears | C clutch |
| Stall speed high - 2nd, 3rd and R gears | D clutch |
| Stall speed high - All ranges | A clutch |
| Stall speed low - R and 1st, 2nd | Engine driveability concern TCC stator |