Best Answer
Fixing SpeedometerI have a '90 F-150 with a 300 inline 6 and manual 4-spd manual transmission. Our speedometer didn't work and here's what we did.

The speedometer cable drives the speedometer and the odometer/trip meter. Fixing one should take care of the others.

The speedometer cable runs from the back of the dash down to the tail of the transmission. There is a bolt (7/16 head) holding the cable assembly to the side of the transmission tail. Clean off all the dirt, then remove the bolt and twist/pull the assembly out of the tranny. Check the gear on the end. The teeth should not be excessively worn. If the gear looks OK, carefully place the round end of the gear in a electric drill and run it backwards while someone is watching the speedometer. This simulates the truck moving. If the speedometer works, the problem may be the gear inside the transmission.

If you can, take a flashlight and look in the hole the gear came out of (we had plenty of's a truck). You'll see another gear inside. It should be straight across the gears. If it is worn curved, the two gears may not mesh and the speedometer won't register any movement, which was our problem. Note the color of the gear. You'll need to know it when you buy the new one, and they're not available at local parts houses, only the dealer. Dealer said these wear out before the more easily accessible side gear. Go figure...

To change the inside gear (plastic, about $15 at the dealer), you have to remove the driveshaft. Before removal, you may want to drain some oil out of the tranny (drain is on the side near the bottom of the main tranny body). We had our back wheels on ramps, so we didn't have any oil come out. If the truck is level, be ready for oil coming from the tranny if you don't drain some. Remove the two bolts holding the transmission mount to the transmission tail. Jack up the transmission body so that the tail is just clear of the mount. Remove the four bolts holding the tail assembly to the main body of the transmission. Carefully remove the tail to the rear.

The gear is held on with a C-ring. Buy special pliers to remove it. It will save you loads of time. We spent an hour trying to remove the ring before we broke down and spent $23 on the pliers. Took about 1 minute with the right tool. With the C-ring removed, slide the gear off to the rear. As you start sliding it, watch for the ball bearing that fits in a hole on the shaft. It's what holds the gear from spinning on the shaft.

Install your new gear by holding the ball bearing in its hole and sliding the groove in the new gear over the ball bearing.

You may want to replace the driveshaft seal in the tail, since it is out and accessible. Reinstall the tail, using RTV after cleaning the mating surfaces. Drop the tranny back onto the mount, reinstall the bolts holding the tail to the mount and put in your driveshaft. Reinstall the speedometer cable/gear to the tail. Add oil if you drained any. Fill plug is above the drain on the same side.

Took quite a while, but speedometer works great now. .

User Avatar

Wiki User

โˆ™ 2015-07-14 15:04:43
This answer is:
User Avatar
Study guides

Add your answer:

Earn +20 pts
Q: How do you fix a speedometer on an 88 f-150 and will this fix the odometer and trip meter?
Write your answer...
Still have questions?
magnify glass
Related questions

How do you reset your speedometer on your 1999 Honda Civic EX Sedan?

You cannot reset a speedometer. You can reset the trip meter but not the odometer. Reset the trip meter by pushing and holding the trip button.

Where is the odometer located in 2006 Honda Accord?

Under the speedometer. Push the trip meter reset button and the display will change from outside temperature to the odometer.

Why would the speedometer trip meter and odometer quit working in my 1990 Olds Delta 88?

check your fuses

Whats the problem if the speedometer odometer and trip do not work on a 1994 Honda civic?

The speedometer is wired to a VSS. If it has failed then the unit will need to be replaced. Odometer and trip meter are wired into the same fuse and should be checked. If the fuse is blown the odometers will not work.

How can i set my camry's speedometer to zero for a new trip?

You are referring to the trip meter right? My 2004 trip meters reset by turning the ignition key to accessory and then hold the reset button sticking out of the bezel in for several seconds. It will reset to 0. Same for the other trip meter if your car has two. The speedometer odometer cannot be reset except by an authorized facility. It is against federal law to reset a speedometer odometer.

How do you reset trip odometer on a 2004 dodge neon?

press the knob on deshboard near speedometer and hold for some time to reset the odometer on any vech. with electronic meter

How do you reset trip meter for suzuki xl-7?

What year is the vehicle? On my 2006, there is a button beside the little window at the bottom of the speedometer. Short presses cycles between odometer, trip meter 1 and trip meter 2. While displaying the trip meter, press and hold the button for about 2 seconds. The trip meter will reset to zero.

You recently changed the speed sensor in your 1990 dodge b250 van the speedometer works the trip and odometer dont any ideas?

If a person recently changed the speed sensor in a 1990 Dodge B-250 Van and the trip meter and odometer do not work, there could be a fuse that needs to be replaced. The computer might also have to be reset to allow for the odometer and trip meter to work.

1996 ford ranger Odometer and Trip gauge don't work but Speedometer works. How can I fix this Thanks?

Speedometer is ran by electronic sensor on rear end. Odometer is ran from speedometer. If both don't work problem is sensor. If speedometer works sensor is okay. If speedometer works and odometer does not problem is in mechanical parts (gears) of of odometer and has to be replaced. Can get used from eBay (search for speedometer or odometer, is one unit) or take to dealer.

What is wrong with a 1993 S10 Blazer when speedometer works but trip mileage and odometer do not work How do I repair?

Broken tooth in speedometer head. Replace speedometer head

How do you reset odometer on 2011 dodge ram?

You can not reset the odometer. The trip meter can be reset by holding down the button.

When you replace a speedometer head on a 1994Mercury Cougsr XR7 is the speedomoter head under the car or in dashboard?

the speed sensor is located on the side of the transmission, there is no physical cable like the older cars, the speedometer and sensor are electronic. If the speedometer is working and showing speed traveled but the trip meter (odometer) is not working, the speedometer itself is faulty, is the speedometer is not showing speed travel and the odometer is not logging miles travel, then most likely the speed sensor is dead.

People also asked