Hey everyone, I know this is not a truck, but I know there is alot of knowledge out there. My father in-law has a 96' ford windstar and just the other day the speedo needle started jumping when he was cruising about 55mph and it shot up to 90 then down to 40mph. I did some research, but could'nt find much on this issue. I was wondering if the speed sensor on the transaxle is bad or a gear on the cable???? I don't know. If there is anybody out there who has had this problem or can give me some hints on what to look for, I would greatly appreciate it, so I can get toa fixin. Thanx for the help in advance. Has a 3.8L and no code has been given. Rich

 

I'd try the sensor first...at least pull it out and see if there is any garbage on the end of it.

 

I have a 1996 Ford windstar that did the exact same thing for 2 years, I finally bought a used spedometer off of one of the auction sites and put it in, only took about 45 minutes and has been fine since.

 

Hey there yerffej have you tried anything else to solve the problem, like speed sensor or anything else? Did the used speedo fix the problem?

 

It fixed the problem fine, I also went from a GL spedometer (fuel, temp and spedo.) to an LX speedometer (tach, spedo, low washer fluid, low fuel, etc.) After I did a cruise control install I found out that Ford puts in the same wiring harness in the GL as the LX, hence everything is plug and play.