I have a T56 with electric VSS(vehicle speed sensor ). My old T45 used a mechanical VSS. Anyone hear what can be done to get the speedo to work besides getting a new tail housing? Im thinking you can swap in a gauge cluster from an 99 and up but not sure if it will work. Im searching the net and no luck so far.

 

Something like this?
Electronic to Mechanical Speedometer Box

 

Mine doesnt have an actually cable but the VSS or sensor in my original tranny had a gear. My current VSS is not gear driven and speedo is way off at miles go zipping by I traveled 500 miles but in actual miles was around 100.

 

So it is sending a signal then, its just wrong.
Mustang Jet Accu-Speed Speedometer Calibrator

I dont know if that would work, maybe you could email Jet and ask.

 

Thanks Ill look mode into it. I got the speedcal but didnt do squat Ill call DM and see if theirs has a certain setting for my issue

 

Just to update this thread with resolution. DM sent me the wrong speedcal even thought I specified the extended version. They ended up sending me the correct one which was great. I drove 10 miles with switch 1,4 up. Told them what my mileage was and they made some calculations on which switches needed to go up.