Speedometer going crazy??
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 421
From: Long Island USA
Originally Posted by Kimba
The mechanic tells me that it is because of the cold, but if that is the case, I don't think they would be using them on Ice Road Truckers.
New User
Joined: Dec 2007
Posts: 8
Likes: 0
From: Gulf Coast of Texas
Originally Posted by krewat
There was a bad batch of instrument clusters from the factory. Go to a dealer and ask about it, if it's under warranty. Ford might replace it even if it's not.
The key symptom is when not moving, it reads a high number, and consistently reads a higher number the faster you go. And is intermittent
The key symptom is when not moving, it reads a high number, and consistently reads a higher number the faster you go. And is intermittent
First traced to an intermittent anti-lock sensor in the diff and when that didn't fix it it was traced to a processor that was part of the instrument cluster that took sensor data from the anti-lock sensor and passed it on to the ECU to control trans shifts.
Nearly $1000 later the whole instrument cluster had to be replaced for a $40 analog to-digital chip that converted the pulses from the anti-lock brake sensor on wheel speed to the ECU. I worked twenty years in the computer business and this is crappy engineering!
I love Ford trucks and especially this one but that's bad design to not place that processing chip in a module under the dash and not require trashing a functional dash cluster for one chip!
Logistics Pro
Joined: Nov 2004
Posts: 4,795
Likes: 47
I had problems with my cluster (2006 F350 CC) mainly last February (while it was cold, of course). I didn't want to take it in then, because I needed to use it. Waited until April, and the dealer couldn't do anything because I wasn't having the problem anymore. Haven't had a problem since then, but am waiting to see if it returns this winter.
Same issues as reported here - speedo shows me at 50 mph when I stopped, or below zero or about 130 mph when I'm m
oving.
Same issues as reported here - speedo shows me at 50 mph when I stopped, or below zero or about 130 mph when I'm m
oving.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 421
From: Long Island USA
Originally Posted by sorrel
I love Ford trucks and especially this one but that's bad design to not place that processing chip in a module under the dash and not require trashing a functional dash cluster for one chip!
And then have that module cost $200 for a new one?
Freshman User
Joined: Dec 2007
Posts: 41
Likes: 0
It's about 20 degrees where I'm at. This morning I was driving and my speedo got stuck at 20mph while in park. My speedo still works except the fact that I have to subtract 20mph from the speed shown. This is an 07 with less than 15,000 miles. I don't want to take it to the dealer.
Senior User
Joined: Nov 2006
Posts: 136
Likes: 0
From: Chadds Ford, PA
same exact thing happened to me the day this was posted on my 06.....call the dealer and they told me it was NOT common and to bring it in after work. Well throughout the day it kept going down REALLY slowly. it was stuck at 42mph for awhile...a few hours latter it was at like 34 then later on it kept going down till later that night it was fine and has been ever since.
Mountain Pass
Joined: Dec 2003
Posts: 197
Likes: 0
Well I'm glad to see I'm not the only one with this problem. i noticed my speedo was stuck at 42 when I thought I was at 55-60. It seems to work fine up to that 42 and just stays there. After it got stuck there I floored it and was at an estimated 70ish. The speedo got "unstuck" and went up to 100ish. Temps are in the high 30's. No hard shifts or any other things going wrong. I'll probably do as most and wait it out hoping it fixes itself.
Will this do anything to the odometer? That wold suck for you guys that are going 30 mph when stopped!
Will this do anything to the odometer? That wold suck for you guys that are going 30 mph when stopped!
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Junior User
Joined: Sep 2007
Posts: 51
Likes: 0
From: Birdsboro, PA
i didnt take notice to it adding extra miles because that was one thing that i was worried about.... everything as been fine lately and we have had some a couple really cold nights since then... i hope it stays the way it should
New User
Joined: Sep 2007
Posts: 6
Likes: 0
From: Colorado Springs, CO
"slow" speedo reading
Had the same "slow" reading on my speedo a few months back. I was towing my trailer and pulled into traffic. Noticed the speedo was reading only about 15-20mph when I know I was accelerating to at least 45-50mph. It did this for about 5-6 miles. I pulled off to the side of the road, shut the engine off for a few minutes, turned it back on and everything was fine...very strange...hasn't happened since then.
Freshman User
Joined: Nov 2005
Posts: 35
Likes: 0
The Odometer does not seam to be conneced with the Speedometer.
The Speedometer does seem to encourage my frustration. Yesterday, I was driving on 95 in Virginia, with my speedometer pegging the display. As a Virginian, I have to drive well within the speed limit so that I don't get a ticket that exceeds the value of one year of truck payments.
The TSB I read, said that it was for trucks made before 1/06, mine was made 4/06 but obviously, I have the problem. So when I get time, the dealership will here my complaint and hopefully remedy my frustration.
The Speedometer does seem to encourage my frustration. Yesterday, I was driving on 95 in Virginia, with my speedometer pegging the display. As a Virginian, I have to drive well within the speed limit so that I don't get a ticket that exceeds the value of one year of truck payments.
The TSB I read, said that it was for trucks made before 1/06, mine was made 4/06 but obviously, I have the problem. So when I get time, the dealership will here my complaint and hopefully remedy my frustration.
Senior User
Joined: Feb 2006
Posts: 396
Likes: 2
The speed sensor is not an analog voltage, It is a pulse that is sent ever time the sensor detects a tooth on the tone ring.
06 did have a bad rash of clusters, it sounds to me that may be your issue.
The speed signal does not go right to the cluster but rather goes from the abs module to the PCM then from the PCM it goes to the cluster through a CAN serial communication - so the cluster does not actually get a "speed" but rather a serial representation of speed from the PCM
Just some info for you guys...
I can back this up with details - if you want more info - email me merc45@gmail.com
kenny
06 did have a bad rash of clusters, it sounds to me that may be your issue.
The speed signal does not go right to the cluster but rather goes from the abs module to the PCM then from the PCM it goes to the cluster through a CAN serial communication - so the cluster does not actually get a "speed" but rather a serial representation of speed from the PCM
Just some info for you guys...
I can back this up with details - if you want more info - email me merc45@gmail.com
kenny
Fleet Mechanic
Joined: Feb 2004
Posts: 1,379
Likes: 9
From: midwest
i hope the problem happens again for those hoping it wont bc u guys r still under warranty, right? at least let the dealer note it or something even though i doubt that if they didnt see it and it goes crazy after warranty but if u have a cool dealer maybe...another thing u could do is take a picture with the truck off...the tach would be at zero but the speedo would not be...that should be some good evidence
Senior User
Joined: Nov 2005
Posts: 270
Likes: 0
From: Montana
just this mornin my truck did something odd that might be relevant to this. it wasnt the speedometer but the tachometer.... i stepped on it to get around some one this morning and it revedd up into the 4k + rpms then when i slowed back down it seemed to think that 2500rpm was = 0 rpm so it was like i was doing 30 mph at 4000 rpm ... at first i thot i wasnt shifting down... but then i noticed the engine wasnt really going that rpm.... speedo was fine.. so now its parked at the office and the tach shows 2500 rpm ... ands it sitting there off.... guess my dealer is getting a call today...
Last edited by CaMo_FroG; Jan 2, 2008 at 10:20 AM.