hooking up spedo for th400
12-22-2007, 05:55 PM
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hooking up spedo for th400 Can somebody tell me where to get the parts to make my speedo work. My car was a 4l60e and now has a th400 it is mainly a drag car that has strange brakes on all four corners so the wss and abs are long gone. What do i need and where can i get it?
12-23-2007, 01:11 AM
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i think you will need a sensor plug bung welded in the tailshaft housing.. my th350 came with one and my speedo only reads half of what the actual mph is
12-23-2007, 08:52 AM
#4
I was waiting for a sponsor to offer the parts.
Go to the link above and follow that. Some incorrect info in the link--a sensor out of a 4L60E/700R4 will not work, they are 2" in diameter, a th400 is 1 7/8.
You could go to GM for the sensor and reluctor wheel. There are two reluctor wheels, one has a small ID for 27 spline outputs (1988-1990 2500 truck th400/3L80) or large ID wheel for 32 spline output shafts 1988-1990 3500 truck th400/3L80/3L80HD)
Your stock wire harness should plug right into the new sensor.
Go to the link above and follow that. Some incorrect info in the link--a sensor out of a 4L60E/700R4 will not work, they are 2" in diameter, a th400 is 1 7/8.
You could go to GM for the sensor and reluctor wheel. There are two reluctor wheels, one has a small ID for 27 spline outputs (1988-1990 2500 truck th400/3L80) or large ID wheel for 32 spline output shafts 1988-1990 3500 truck th400/3L80/3L80HD)
Your stock wire harness should plug right into the new sensor.
