SpeedO stopped working.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
Cable routes from speedometer to left (drivers) side of transmission case. Possible causes why speedo no longer works.
1) You knocked the cable loose while replacing the filler hose.
2) Inside the speedometer cable housing is a woven steel core. It's supposed to be lubed every so often, but most people are unaware.
When the lube dries out, the core binds up inside the housing, eventually snaps.
Autoparts stores sell a 'universal' woven steel core kit. Cut it to length, coat with a fine film of graphite, install in housing.
3) At the end of the cable where it fits into trans is the speedometer DRIVEN gear. If teeth are stripped, speedo no longer works.
Remove cable from trans, inspect gear. You didn't say what trans the truck case, so the gear could be cast iron, fiber or nylon.
1) You knocked the cable loose while replacing the filler hose.
2) Inside the speedometer cable housing is a woven steel core. It's supposed to be lubed every so often, but most people are unaware.
When the lube dries out, the core binds up inside the housing, eventually snaps.
Autoparts stores sell a 'universal' woven steel core kit. Cut it to length, coat with a fine film of graphite, install in housing.
3) At the end of the cable where it fits into trans is the speedometer DRIVEN gear. If teeth are stripped, speedo no longer works.
Remove cable from trans, inspect gear. You didn't say what trans the truck case, so the gear could be cast iron, fiber or nylon.
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rashanny
1948 - 1956 F1, F100 & Larger F-Series Trucks
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Mar 31, 2011 11:14 PM
