Speedymeter Question

[AaronC47]

I just got another 4wd 2door Explorer a couple weeks ago, its automatic and good shape well takin care of, and even came with paper work to show that someone else put another transmission in it a number of years ago with not many miles on the rebuilt,, ANYWAY - Anyone know what makes the speedymeter act up,, in slow speeds like in town and such it seems ok, but I get on the highway or freeway and staying with traffic and my gauge is pointing down to the 75 - 80 mph range,, and I know I am only doing maybe 65 - 70, it has the stock size tires, A4LD, 4 spd auto, this is just one of them things not serious enough to fix it right now or to find cause right now, but just thought I would ask if anyone else has had this and knew of a fix, or even the cause, Oh and its a 91 with only 147,000 miles on it, I have a lifetime warrenty for leaks on windshield, a lifetime on muffler from Midas, and like I say it had new transmission from ford at the tune of $1600 back in 1998, and that was only about 25,000 miles ago, and all I had to do for this was to trade off my 94 Ford Taurus Wagon with 105,000 that I paid about $600 for,, I think I came out ahead on that one,, lol

Aaron

 

[DeanMoriarty]

I just bought a 4x4 2d Explorer too. Cheers

I know it's possible to adjust the speedometer, that's something you have to do to compensate for oversized tires if you want it to read correctly. At lower speeds it will seem accurate, but at highway speeds it will increase or decrease exponentially. I'm sure someone on here knows how to fix it.

 

[fordmandan87]

speedo itself is wore out possibly cable stretching too