Speedometer cable How do you replace the speedometer cable on a 1988 chevy 1500 pick up with a automatic trans and a 5.7 engine? I removed the cable screw from the trans but it will not pull out. There is a thin cable wire going into the trans but it does not want to pull out.

Removal Procedure

1. Remove the instrument cluster assembly. Refer to Instrument Cluster Replacement .
2. Unhook the speedometer cable from the heater case.
3. Remove the grommet from the bulkhead.
4. Feed the speedometer cable through the bulkhead.
5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

Unscrew the speedometer cable (1) from either the transfer case or the transmission. Remove the speedometer cable (1) from either the transfer case or the transmission. Remove the speedometer cable (1) from the clamp. Remove the speedometer cable (1) from the vehicle.
Instrument Cluster Replacement
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
Disconnect the negative battery cable. Remove the hazard lamps switch by gently pulling the knob straight up. Remove the instrument cluster bezel from the instrument panel. Refer to Instrument Panel Cluster Trim Plate Bezel Replacement . Remove the 4 screws and pull the instrument cluster assembly forward from the instrument panel. Disconnect the 3 electrical connectors. Remove the speedometer cable at the speedometer head. Remove the instrument cluster assembly from the vehicle.
Remove the 5 screws (2) and the steering column upper and lower covers (1, 3).
Remove the 4 screws and the instrument cluster bezel from the vehicle.

ever find the problem?im havin same thing

These are run by a module on your trans now. It is the same one that shifts the truck. They are kind of expencive to replace. You will see it on the driverside of you truck on the side of the trans. There is going to be two that you will see it is going to be the inside one that runs the speedo.

If it has a cable, it connects to the cluster and either to the transmission or to a speed sensor then to the trans.
Sometimes you can remove the cable from the cluster from under the dash, or you have to remove the cluster to gain access.

Speed sensor is most likely goin or gone out. It is located on the drivers side of the transmission tailshaft. Speed information runs through the cruise control and the computer to the speedometer.

the speedo cable is probably broken. pull the cable out of the trans and gauge cluster and use a drill to SLOWLY spin it. make sure the other end spins if it doesent replace the cable if it does make sure the spedo gear on the trans side is not chewed up. if that is good replace the speed cluster withe a new one or have it fixed at a shop.

Easiest to just get a new gauge cluster -

Remove the dash bezel (some screws/clips), then remove the 4-5 screws that hold the cluster in (can't remember exactly how many). Pull the gauge panel partially out, remove wires and detach speedo cable.

Installation is the reverse of removal.

possible speed sensor at rear of transmission,does engine rpm sound higher then narmal,and is your trans shifting as it should,if these problems are also present replace the speedometer sensor at rear of trans,$50 to 60 bucks

Did the transmission you put in have the the pick up on the output shaft. Pull out the vss and see if the pick-up is on the shaft or a speedo gear is on the shaft. If it has a gear, you will have to change it to a pick up wheel. The older 700 transmissions used gears.

Replace the Speedometer Cable

1 - Remove the old speedometer cable from your car, first take off the doghouse and then the engine cover.

2 - Remove the screw underneath the dashboard and take down the steering column. This will give you access to the back of your speedometer.

3 - Take off the drive shaft bolt, and "O" ring, insert the speedometer cable through the firewall.

4 - Remove speedometer cable securing clamps from the engine compartment and on the transmission.

5 - Release the drive shaft nut from the "right angle" adapter (The nut is attached to the back of the transfer case).



Installing the Speedometer Cable

1 - Place the square end of the speedometer cable into the adapter and secure the drive shaft nut.

2 - Pull the speedometer cable through the firewall to the rear of the speedometer.

3 - Secure the "O" ring and attach the speedometer cable to the rear of the speedometer/odometer. It should be engaged in the speedometer's square hold. Tighten the drive shaft nut again.

4 - Replace the clamps that will secure the speedometer cable onto the transmission and in the engine compartment. Replace the engine cover.

5 - Drive your car slowly to be sure your speedometer is working properly. If it is, replace the doghouse. If you're stilling having problems, take the car to your mechanic.


Parts & tools -
Speedometer cable
Wrench
Screwdrivers

Good Luck.