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.
Time Lag Test: Notes
- Perform mechanical system test preparation. (See MECHANICAL SYSTEM TEST PREPARATION .)
- Start the engine.
- Warm up the engine until the ATF temperature reaches 60-70°C {140-158°} . Shift the selector lever from N position to D range.
- Use a stopwatch to measure the time it takes from shifting until engagement is felt. Take three measurements for each test and average the results using the following formula.
Formula
Average Time Lag =(Time 1+ Time 2+ Time 3) / 3
- Perform the test for the following shifts in the same manner.
- N position > P position
Time Lag
N > D range... approx. 0.5-1.0 second
N > R position... approx. 0.6-1.1 second
- N position > P position
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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.
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