Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSLINCOLN2006NAVIGATOR 4WD V8-5.4L VIN 5REPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLETESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICS4R70E/4R75E - AUTOMATIC TRANSMISSIONNON-TROUBLE CODE PROCEDURESSTALL SPEED TEST
2006 Lincoln Navigator 4WD V8-5.4L VIN 5
Stall Speed Test
2006 Lincoln Navigator 4WD V8-5.4L VIN 5SECTION Stall Speed Test
Stall Speed Test
WARNING: Apply the parking brake firmly as well as the foot brake while carrying out each stall test.
CAUTION: Carry out Line Pressure Test prior to carrying out Stall Speed Test. If the line pressure is low at stall, do not carry out Stall Speed Test or further transmission damage will occur.
The Stall Speed Test checks:
^ Torque converter clutch operation and installation.
^ Holding ability of the forward clutch.
^ Reverse clutch (the low/reverse bands).
^ Planetary one-way clutch.
^ Engine driveability.
Conduct this test with the engine coolant and transmission fluid at correct levels and at normal operating temperature.
Apply the parking brake firmly for each Stall Speed Test.
1. Find the specified stall rpm for the vehicle. Refer to the Stall Speed Chart. Use a grease pencil to mark the rpm on the dial of a tachometer.
2. Connect a tachometer to the engine.
3. NOTE: If the rpm recorded by the tachometer exceeds the maximum limits, release the accelerator pedal immediately because clutch or band slippage is indicated.
In each of the following ranges (D), 2, 1, R, press the accelerator pedal to the floor and hold it Just long enough to let the engine get to wide open throttle (WOT). While making this test, do not hold the throttle open for more than 5 seconds at a time.
4. Note the results in each range.
5. After each range, move the shift control selector lever to NEUTRAL and run the engine at 1,000 rpm for about 15 seconds to cool the torque converter before making the next test.
6. Refer to the Stall Speed Diagnosis Chart for corrective actions.
WARNING: Apply the parking brake firmly as well as the foot brake while carrying out each stall test.
CAUTION: Carry out Line Pressure Test prior to carrying out Stall Speed Test. If the line pressure is low at stall, do not carry out Stall Speed Test or further transmission damage will occur.
The Stall Speed Test checks:
^ Torque converter clutch operation and installation.
^ Holding ability of the forward clutch.
^ Reverse clutch (the low/reverse bands).
^ Planetary one-way clutch.
^ Engine driveability.
Conduct this test with the engine coolant and transmission fluid at correct levels and at normal operating temperature.
Apply the parking brake firmly for each Stall Speed Test.
1. Find the specified stall rpm for the vehicle. Refer to the Stall Speed Chart. Use a grease pencil to mark the rpm on the dial of a tachometer.
Stall Speed Diagnosis Chart:
Stall Speed Chart:
2. Connect a tachometer to the engine.
3. NOTE: If the rpm recorded by the tachometer exceeds the maximum limits, release the accelerator pedal immediately because clutch or band slippage is indicated.
In each of the following ranges (D), 2, 1, R, press the accelerator pedal to the floor and hold it Just long enough to let the engine get to wide open throttle (WOT). While making this test, do not hold the throttle open for more than 5 seconds at a time.
4. Note the results in each range.
5. After each range, move the shift control selector lever to NEUTRAL and run the engine at 1,000 rpm for about 15 seconds to cool the torque converter before making the next test.
6. Refer to the Stall Speed Diagnosis Chart for corrective actions.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.