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.
1981 Plymouth Champ LS, Automatic TransFACTORY OEM SERVICE PROCEDURE
Rotor Test
- Test rotor for grounded, open or shorted field coils using an ohmmeter. Test for grounds between slip rings and rotor shaft. No continuity should exist. Check for an open field by connecting ohmmeter across slip rings.
- Ohmmeter reading should be 1.7-2.1 ohms (100 amp.) or 1.5-2.0 ohms (all others) with rotor at room temperature. Slightly higher readings will be found for rotors that are still warm from operation.
- Readings above 3.5 ohms indicate high resistance and may require rotor replacement. Readings below 1.7 ohms (100 amp.) or 1.5 ohms (all others) indicate field coil is shorted.
Factory Service Tools
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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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