First off, hello everyone on allpar! I just joined because every time I do a google search for something on my truck (a 1990 d150) I wind up here reading something interesting, so this seems to be THE place to find information on mopar! By joining I hope to be able to get more specific assistance with my vehicle, and maybe I can share some of the things I have learned owning a dodge as well.
I have a 1990 Dodge D150 S base model - regular cab, long bed, 3.9L with a nv535/np2500 trans - two wheel drive.
The problem: My speed/distance sensor has gone goofy, especially first thing in the morning; I'm in second gear and my speedometer says I'm going 90. I know it is the sensor and it needs to be replaced, but I also know that the replacement will be the same poor design - ie reed switches and a magnet. I went to the parts store and looked at the replacement sensor, then I asked to see the sensor from a 1994 ram. The later sensor has three pins, meaning it is almost certainly Hall effect, and far more reliable. Switching my truck over to a Hall effect is no big deal for me - one or two transistors and I can easily convert the signal. The problem is in the mounting; my sensor mounts the same as a conventional speedo cable would - a threaded fitting with a square cable end. The newer sensor appears to snap into the transmission and use a bolt for attachment.
If anyone knows of a compatible Hall effect sensor for my vehicle (even if it doesn't send the same number of pulses per revolution) or some off-the-shelf adapter, I will post schematics and instructions so anyone else can make the same upgrade.
I have a 1990 Dodge D150 S base model - regular cab, long bed, 3.9L with a nv535/np2500 trans - two wheel drive.
The problem: My speed/distance sensor has gone goofy, especially first thing in the morning; I'm in second gear and my speedometer says I'm going 90. I know it is the sensor and it needs to be replaced, but I also know that the replacement will be the same poor design - ie reed switches and a magnet. I went to the parts store and looked at the replacement sensor, then I asked to see the sensor from a 1994 ram. The later sensor has three pins, meaning it is almost certainly Hall effect, and far more reliable. Switching my truck over to a Hall effect is no big deal for me - one or two transistors and I can easily convert the signal. The problem is in the mounting; my sensor mounts the same as a conventional speedo cable would - a threaded fitting with a square cable end. The newer sensor appears to snap into the transmission and use a bolt for attachment.
If anyone knows of a compatible Hall effect sensor for my vehicle (even if it doesn't send the same number of pulses per revolution) or some off-the-shelf adapter, I will post schematics and instructions so anyone else can make the same upgrade.
