Reference Details
- Common issue
- A forged or cast crank, damper, converter, or flywheel represented as assembly-correct without checking the factory cutoff and matched balance parts
- Confidence
- documented
- Correct value
- Chrysler-Plymouth TSB 09-07A-72C states that production changed from a forged to a cast 340 crankshaft on April 11, 1972 with engine serial number HM340R-3911-8000; the cast crank has sharp-cornered counterweights and raised CFD letters on the number-four counterweight, and its damper is marked for 340 cast-crank use
- Where to check
- Engine serial, crankshaft number-four counterweight, vibration damper, torque-converter or flywheel balance evidence, build date, and car-specific records
