Can't find speedometer cable on the firewall

[Devo55]

My 1993 Explorer 2WD speedo needle starts to bounce at 50mph. I want to change the cable but can't find where the cable goes through the firewall from the instrument cluster.

 

[Mbrooks420]

Pretty sure these use Hall effect sensors?

 

[Turdle]

You might check the speedometer drive gear in transmission tail housing

 

[Rick]

Pretty sure these use Hall effect sensors?

Cable driven.

 

[Rick]

You might check the speedometer drive gear in transmission tail housing

And if the gear looks good, follow the cable from the tail housing to the firewall.