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Your cart is empty.If you have an older model Compatible GM transmission and are using the programmable speedo set, don't forget your pulse generator. See the additional information below to see if this is needed for your application.+ Allows modern Compatible with GM engines to be mated to non-electronically controlled GM automatic transmissions.+ Converts mechanical speed signal into a digital square wave signal, at 128K pulses per mile, for you modern GM "engine computer"/speedometer+ 8000 pulses per mileTransmission types and required Pulse Generator: :C-4C-6 Tremec 5 SpeedAOD:All these require 4ed Pulse except some C-6 (Have screw on cables) therefore GM Pulse would applyGM:Turbo 350Turbo 400 (All require GM Pulse)200R4Power Glide700R4 Early Model (Require GM Pulse)--------------700 R4 Late Model (Already built in)4L60E (Already built in)4L80E (Already built in):GM: They will use their existing Speedo Cable as well to screw onto this mechanical Transmission - NAPA'S Part #'s 904 & 727 - Long Cable 615-1666 Short Cable 615-1665
Terry Speake
2025-05-30 10:41:46
I bought this Dolphin Gauges Pulse Generator for a totally custom build.I am using it for VSS (vehicle speed sensor) to a Megasquirt MS3X ECU.With additional circuitry it works very well.I am knocking off 1 star because I had to add circuitry to create a digital square wave signal.The product description says "Converts mechanical speed signal into a digital square wave signal"The actual output of the sender is an AC signal that increases in frequency and amplitude with speed similar to a VR sensor and toothed wheel.Since I am already using both zero crossing conditioner circuits in the MS3X for crank and cam signals so I needed a square wave input.I had a sirhclabs MAX9924 conditioner board that works in A2 operating mode handy from a past project.Feeding the output of the pulse generator into it and using MS3X 5Vref to the board gives a nice 0-5V square wave out to the MS3X even at very slow rotation.Edit: Added pictures of the output of the generator (blue trace) and after conditioner board (yellow trace) at the slowest and fastest speed my hand drill would go when I was testing.
Joseph Volk
2025-04-09 17:53:16
I bought this generator for a 37 Chevy project hot rod I'm building. The car has a turbo 350 transmission. So when you screw the generator onto the speedo drive to the last thread it's still loose. The nut that holds it on to the speedo drive is too deep. The fix is find a washer that fits into the hollow of the generator nut. The looseness is the thickness of a washer. Drop the washer into the bottom of the nut and tighten it up...YOUR good to go.It's a toss between 4 stars and 5. Because It fits but not really I gave it a 4
Gonzo
2024-12-24 18:42:52
Wouldn’t seal on a TH350 transmission. I had to add O rings so the transmission fluid wouldn’t leak.
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