1994 Mustang COBRA - speedometer not working

meirharnoy

New Member
May 1, 2019
11
0
1
43
Wellington, FL
HI Guys,
My car is 1994 Indy Cobra (5.0/Manuel)
My problem:
My speedometer stopped working (I bought the car like that).
I bought the “Odometer Gear Repair Kit 1994-1998”, and after opening the dash, I checked the gear and everything looks just fine. No tooth was broken and nothing looks like a problem.
Then I installed new “sensor speed”. While replacing I checked the gear and it look bran new. No tooth is broken.
It’s a low mileage car. around 30,000
What should I do next? Any suggestion what to check and can be the problem.
Thanks for your help
Meir
 
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STEVE PATTON

I smell a conspiracy
Jan 6, 2019
193
97
38
70
ohio
HI Guys,
My car is 1994 Indy Cobra (5.0/Manuel)
My problem:
My speedometer stopped working (I bought the car like that).
I bought the “Odometer Gear Repair Kit 1994-1998”, and after opening the dash, I checked the gear and everything looks just fine. No tooth was broken and nothing looks like a problem.
Then I installed new “sensor speed”. While replacing I checked the gear and it look bran new. No tooth is broken.
It’s a low mileage car. around 30,000
What should I do next? Any suggestion what to check and can be the problem.
Thanks for your help
Meir
With the speedo out, drive the car and see if the inner speedo cable is turning.It will tell you which direction the problem is.
 

Mustang5L5

i'm familiar with penetration
Mod Dude
Feb 18, 2001
33,272
9,576
224
Massachusetts
There’s a speed sensor on the transmission. Either it’s failed, or the internal drive gear has popped off the clip holding it in place and has shifted.
 

Mustang5L5

i'm familiar with penetration
Mod Dude
Feb 18, 2001
33,272
9,576
224
Massachusetts
Did you look inside the trans to verify the drive gear is in position and has not slipped off to thr side?

Failure of the clip that holds the drive gear in place is common
 

revhead347

Just rub Vaseline all over
15 Year Member
Jun 14, 2004
8,380
1,201
214
40
Acworth, GA
There is no cable, and the gears on the back of the instrument cluster have nothing to do with the speedo not working. Those gears only do the odometer and trip meter. The gear on the speed sensor is the driven gear. Look inside the transmission to make sure the drive gear has all of it's teeth. That usually isn't the problem. It's possible the wire has gone bad, but usually the speedo has just gone bad. You have to find a used one. I've gone through about 2 of them over the years.

Kurt
 

meirharnoy

New Member
May 1, 2019
11
0
1
43
Wellington, FL
Hi Kurt,
just to be clear, both Speedo and trip meter don't work. does that mean I have 2 problems or its one problem serve two items.
when i took out the sensor, the gear was complete and almost look like new, nothing left in the transmission.
the wires looked good as well.
any idea/direction to follow?
 

revhead347

Just rub Vaseline all over
15 Year Member
Jun 14, 2004
8,380
1,201
214
40
Acworth, GA
If the speedo doesn't work, then the trip meter won't work. The speedo sends the signal to the motor that drives the tripmeter. My speedo isn't working consistently right now either. I think I am on my 3rd one. They just go bad every once in awhile.

Kurt
 

rockyracoon

10 Year Member
Nov 23, 2005
791
17
29
margate NJ
Also consider a wiring issue in the harness that goes to the trans. That harness connector is on the upper firewall. just past the passenger valve cover, it goes over towards the brake booster and then down to the tranny. When I installed my speedcal I had to splice into those wires.
 

King94Stang

New Member
Sep 13, 2020
1
0
1
44
North Carolina
HI Guys,
My car is 1994 Indy Cobra (5.0/Manuel)
My problem:
My speedometer stopped working (I bought the car like that).
I bought the “Odometer Gear Repair Kit 1994-1998”, and after opening the dash, I checked the gear and everything looks just fine. No tooth was broken and nothing looks like a problem.
Then I installed new “sensor speed”. While replacing I checked the gear and it look bran new. No tooth is broken.
It’s a low mileage car. around 30,000
What should I do next? Any suggestion what to check and can be the problem.
Thanks for your help
Meir
I pulled the instrument cluster off and looked at the circuits on the back. You’ll notice where the wires clip in, on the right side of the back of the panel, the circuits run down toward the speedometer. If the circuit is broken you need to replace that housing. I’ve circled it in red. Once I swapped out housing speedometer worked.
 

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