Speedometer reprogramming options?

[TrackAire]

On a 1993 Explorer 4x4, if I need to change the speedometer to read correctly for new tires and gears is there a preferred method? I'm not familiar if this truck just needs to have the gears changed in the speedo cable at the transmission or if it can be done electronically. Thanks in advance.

 

[Turdle]

Here's a start.

I searched this sub forum for "speedometer tires" and there were several threads

speedometer calibration

im getting bigger tires on my 94 eddie bauer. someone told me that i will have to calibrate my speedometer and i dont want to take it to a shop and pay a load of money. how exectly is that done? and pictures would be perfect thanks

www.explorerforum.com

 

[410Fortune]

You will be changing the speedometer drive gear on the end of the speedometer cable at the vss sensor it is mounted in the tailhousing of the transfer case or transmission

 

[TrackAire]

Ok, I thought it was an old fashioned gear driven system but then I made the mistake of looking at JET Performance Chips and they have a Accu Speed listed for my truck....obviously that's wrong.

 

[410Fortune]

well yes it is wrong....but
they do sell it for your model
The VSS sensor has a cable for the dash speedometer but it also contains the electric VSS sensor for the pcm, cruise control and 4x4 ESOF

I do not know why you would need to calibrate the signal further then the driven gear change....but simply because it still uses a vss it is likely they offer the product.

in 1996 the cable went away entirely