T-56 Transmission Install Thread
I've been working on using the stock VSS to drive the original mechanical gauge for the better part of two years now as a side project (and because I'm stubborn). Have gone through about 4 or 5 iterations on the design and think I finally have one I like, but naturally it appears my VSS has died now that I'm ready to try it out. I have a Raspberry Pi mounted under the dash with a screen as a secondary gauge cluster and to allow tweaking things with my Megasquirt setup. I wrote a problem that runs on it to take the pulses that come out of the VSS to run a small motor attached to the back of the speedo with a 3D printed mount. Had it working on a table with a signal generator, but have not gotten it to work in the car as my VSS doesn't appear to be working anymore. I don't really feel like buying a Dodge replacement as they are something like $120, but I've heard a rumor it's just a Honeywell GT1 series sensor. I've been planning to take it out of the car to measure to see about ordering a generic replacement, but just never have gotten around to it yet.
The main challenge has been finding a motor strong enough to overcome the initial drag in the speedo mechanism. I could go super powered and just remote mount it with a cable, but I wanted a more elegant solution of a direct mounted motor if possible.