1983 Porsche 944 AutomaticFACTORY OEM SERVICE PROCEDURE

Speed Sensor Clearance

NOTE: Adjusting speed sensor automatically adjusts reference mark sensor. They cannot be adjusted separately.
  1. The speed sensor bracket is mounted on the crankcase flange with 2 bolts. To adjust clearance, loosen bolts and turn sensor holder. Clearance should be .030-034" (.75-.85 mm).
  2. To adjust clearance with engine installed in vehicle, remove speed sensor. Using a depth gauge, measure distance from sensor holder's upper surface to tooth head on starter ring gear.
  3. Measure length of speed sensor. Subtract speed sensor length from holder-to-flywheel tooth distance. Difference should be .030-.034" (.75-.85 mm).
  4. If not to specification, loosen screws and turn holder until holder-to-flywheel tooth distance is equal to the length of the sensor plus the specified clearance. Tighten screws, and install speed sensor in holder.
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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