speed sensor

Reply Subscribe

Thread Tools

Search this Thread

Nov 15, 2005 | 06:10 PM

whreq

Thread Starter

New User

Joined: Nov 2005

Posts: 6

Likes: 0

speed sensor

my speed indecator went to "0" at 35 mph. the truck got me home , but only in first gear. any ideas what may have caused this.

Nov 15, 2005 | 07:33 PM

greystreak92

Lead Driver

Joined: Sep 2002

Posts: 9,182

Likes: 12

From: Gateway to the West

What year truck are we talking about here?

Nov 15, 2005 | 07:33 PM

masseysbronco

Posting Guru

Joined: Dec 2004

Posts: 1,023

Likes: 0

you need to check for codes, but sounds like the Vehicle speed sensor, which is mounted in the top of the rear axle (87-96 i think). What year is your truck? you need to give us more info to work with.

Nov 15, 2005 | 08:50 PM

whreq

Thread Starter

New User

Joined: Nov 2005

Posts: 6

Likes: 0

sorry, 1994 . the ABS light came on also.

Nov 15, 2005 | 11:25 PM

greystreak92

Lead Driver

Joined: Sep 2002

Posts: 9,182

Likes: 12

From: Gateway to the West

Masseysbronco has it pegged then. VSS failure. Its in the top of the rear differential housing held in with a single bolt. Check the connection to it first and the wiring harness nearby for abrasions or other damage. If you find nothing, you can remove the sensor and trying wiping it down and re-installing it to see if the "cleaning" was all it needed. But from the way you described it, it up and quit on you or something came up and severed the wire(s) to it.

Pulling the codes won't hurt either, this way you can either confirm or deny that the VSS is indeed the culprit.

Last edited by greystreak92; Nov 15, 2005 at 11:27 PM.

Nov 16, 2005 | 07:23 PM

whreq

Thread Starter

New User

Joined: Nov 2005

Posts: 6

Likes: 0

thanks for you help. i wont have time to work on it until this weekend, but i'll let you know. thanks again.

Nov 16, 2005 | 07:54 PM

Super-Dayv

Junior User

Joined: Nov 2005

Posts: 67

Likes: 0

From: Bar-B-Q Capital

I have a speedometer question...I know when you change rear gears in a Mustang you can change the gear on the speed sensor so the speedometer is correct. Is it possible to do the same on the Bronco when the tire size has been increased? I just bought a 89 Bronco, A/T, 302, 3.55 limited slip gear with 31x10.5 on the stock wheels. I want to change wheels and go up to a 32x11.5 like my old 88 Bronco, but I know the speedo is already off 5 mph...is this possible?

Top 10 Ford Truck Tragedies

Joe Kucinski

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

Nov 23, 2005 | 07:18 PM

whreq

Thread Starter

New User

Joined: Nov 2005

Posts: 6

Likes: 0

ABS light is out, loose batt. wire, truck runs fine. i'm off to the woods. love to hunt and surf fish in my truck. thanks again.

Nov 28, 2005 | 01:24 AM

#10

greystreak92

Lead Driver

Joined: Sep 2002

Posts: 9,182

Likes: 12

From: Gateway to the West

Actually, whreq, the reason your ABS light is out now is because when you disconnected the battery to fix the connections to it, you allowed the ABS computer to reset. This cleared the error code that was generated when the VSS failed. To clear the code youwould have had to disconnect the battery.

Quote:

Originally Posted by Super-Dayv

On your 89, yes, you can and HAVE TO regear the speedo to compensate. With 92 and newer Bronco's and F-sereis you need to reprogram the PSOM.

Nov 28, 2005 | 08:38 AM

#11

Super-Dayv

Junior User

Joined: Nov 2005

Posts: 67

Likes: 0

From: Bar-B-Q Capital

Thanks Greystreak92!

Nov 28, 2005 | 11:44 AM

#12

Super-Dayv

Junior User

Joined: Nov 2005

Posts: 67

Likes: 0

From: Bar-B-Q Capital

Greystreak92,
Do you have any idea which way I need to go or which gear I will need?

Nov 28, 2005 | 12:08 PM

#13

greystreak92

Lead Driver

Joined: Sep 2002

Posts: 9,182

Likes: 12

From: Gateway to the West

Unfortunately, all of the trucks I have dealt with are PSOM-equipped. I do know that Ford made speedometer drive gears in different colors depending upon the number of cogs (teeth) they had but beyond that I've little experience actually doing the swap. Some of the guys here have done what you are needing to do to yours. I'm certain someone can give you some better insight than I can.

Nov 28, 2005 | 12:17 PM

#14

Super-Dayv

Junior User

Joined: Nov 2005

Posts: 67

Likes: 0

From: Bar-B-Q Capital

Thanks anyways, i know the colors have to do with the # of teeth. But I am not sure if i need to go bigger or smaller...like you said, hopefully somebody else has delt with this and will post shortly. Thanks again!