Need some help figuring out the gear ratio I need

[gw33gp]

I use the Dakota Digital unit to calibrate my speedometer and it works very well. The problem is I don't think the 86 Rangers used an electronic signal for the speedometer. I could be wrong but I think they still used a speedometer cable. If so, there should be gears that can be changed in the drive in the transmission.

 

[Captain Ledd]

That is true, but in the first post he says this is for a 2009 B2300.

I've been thinking about getting that box for myself. I have a intermediate year ('95-'97 only?) where I have a mechanical gear by the transmission (already replaced the one gear when I went from the 225/70R14 tire to a 235/75R15), but it goes right into some sensor/converter that gives an electrical signal. I've looked for the correct driven gear I need (that supposedly exists, once upon a time I had a part #) but no one seems to have it, and I'm having my doubts. I think it's purple? though some say burgundy.

How hard was that box to set up? It'd be nice to have a properly working speedometer again.

 

[racsan]

thats the only thing i hate about my swap to 4.10's (had 3.45's) my speedometer was off by over 20 mph with stock 225/70/14 tires and now currently off by about 7 mph with 255/70/15's. going to make up a card to slip over the trip meter reset with the conversion from "reads" and "actual" did that with a 3/4 ton one using the tach as my referance when in a certian gear because speedometer didnt work at all. i couldnt find 4.56 in a junkyard, could only find 4.10's and only 2 axles with them at that. didnt want to pay the money for new gears and all the stuff required for the setup. much easier to roll a used rear end under. i did put new seals in and a brake spring kit, new wheel cylinders and made new hard lines.