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.
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HOMESERVICE MANUALSTOYOTA1985CELICA SUPRA BASE, AUTOMATICREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSOVERHAUL - A43, A44 & A46TESTINGTIME LAG TESTNOTES
1985 Toyota Celica Supra Base, Automatic
Time Lag Test: Notes
1985 Toyota Celica Supra Base, AutomaticSECTION Notes
- Engine and transmission must be at normal operating temperature. Start engine and ensure idle RPM is within specification with A/C off. Idle speed for Pickup and 4Runner is 750 RPM in Neutral. Idle speed for Previa is 720 RPM in Neutral. Apply service and parking brakes. Using stop watch, measure time until engagement shock is felt when selector lever is shifted from "N" to "D" position.
- Allow one minute intervals between tests. Perform time measurements 2 more times and calculate average value. Time should be less than 1.2 seconds. Repeat test procedure to test time lag when selector lever is shifted from "N" to "R" position. Time lag should be less than 1.5 seconds.
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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.