Yes that could very well be the issue. Here's the instructions on changing your speedometer cable
REMOVAL PROCEDURE
1. Remove the cluster assembly.
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.
6. Unscrew the speedometer cable (1) from either the transfer case or the transmission.
7. Remove the speedometer cable (1) from either the transfer case or the transmission.
8. Remove the speedometer cable (1) from the clamp.
9. Remove the speedometer cable (1) from the vehicle.
INSTALLATION PROCEDURE
1. Attach the speedometer cable (1) to the clamp.
2. Screw the speedometer cable (1) to the transfer case or the transmission.
3. Lower the vehicle.
4. Feed the speedometer cable (1) through the bulkhead.
5. Install the grommet to the bulkhead.
6. Hook the speedometer cable (1) to the heater case.
7. Install the cluster assembly.
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Tuesday, May 3rd, 2011 AT 1:14 PM