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Four-pulse square wave speed sensor (4 PRS).
This unit runs GM electric speedometers.
4-Pulse Integral Sleeved Speedometer Gear Set for 700-R4 or 4L60-E
6-Bolt Tailhousing Adapter for 4L60-E V8 engine swaps
Collar Clamp and keyway #4L60-004 for 4L60-E Swaps using driven gear for cable speedometer
Differential Mounted 40-Tooth Reluctor Ring Kit for S10 & 4L60-E V8 #4L60-006
FREE EXCERPT: Vehicle Speed Sensors from Chevrolet TPI & TBI Engine Swapping