05 6.0L xlt if that matters. Occasionally, I'll be driving and the speedometer will stick at a certain speed as I slow down. So yesterday it happened again on my way to work, but it was worse. I noticed that as I was driving, the needle was stuck at 0mph. Then a minute later as I was accelerating from a stop, It began working again. A few minutes later, as I was slowing down for a red light, it was stuck at 55mph. As I accelerate again, the needle moves as if 55mph is 0mph. Then it stuck at 85. And as I drive, the needle is just pegged well past 100mph, even though, I'm doing 65-70 max. I have Torque Pro, and all the info from the computer is correct, I can accurately measure my speed from there. Turning the truck off does not reset the needle or anything. It still remains stuck with the truck off, which makes me think it's something mechanical. Eventually, the needle usually lets go and begins working normally for a while.

In addition to the speedo issue, which has happened multiple times, The tachometer was working correctly, then all of a sudden was showing that the RPMs were about 800-1000 lower than normal. When idling, the needle was at zero. When at 65, the needle was around 1000-1100, when it normally reads about 1900. When I left work last night, the tach was fine, but the speedo was still stuck at 85.

Anyone else have something like this happen? It doesn't do it very often, it's just frustrating when it does. All the other gauges seem to function normally. The temp gauges still move, although, I know that means pretty much nothing. The boost gauge is good too.

 

Never heard of a problem like that before. I recomend calling Cuircut Board Medics. There are very helpful on diagnostics, and good prices of repairs if needed

 

Thanks, I'll give them a call on Monday. Eventually, I'd like to swap to an '08 dash, so maybe if replacement is the only option I can get an '08 cluster. Although, I'm thinking it's a bit taller than the 05 cluster since the fuel, boost, and temp gauges are along the top.

 

bthr22, I just saw this, so I'm following up to make sure that you have already been helped. I hope that you have already called us and gotten this taken care of, but if not, here's a link to our service description for your cluster:

https://circuitboardmedics.com/ford-...luster-repair/

bobv60, thanks for the recommendation!

 

Thanks for checking in! I have yet to call, as I've had some charging issues arise within the last few days. So once I have that sorted, I'll focus on the cluster. Currently, the RPMs are reading accurately, but the speedometer is still reading inaccurately. The place that the needle gets stuck at changes every time I drive. I'm not super worried about it since I can still use the torque app.

 

Had something similar to that happen 4 wks ago after losing my brakes on my 2009 F350SD SRW. Found out that the speed sensor gets affected when you lose the brakes catastrophically. (I was towing a 13k boat when the brakes blew but got the job finished to the destination). After I got the brakes fixed the speedo would fluctuate while underway. Didn't think too much about it but then the transmission started shifting funny as the speedo fluctuated. Took it right in to replace the sensor and has worked great since.

 

I didn't think about that. I didn't have any kind of catastrophic brake failure. I did replace the calipers, rotors, and pads last summer. But if it was a faulty speed sensor, wouldn't that also cause issues with monitoring speed through Torque?