NP205 speedo gear reduction part question W/photos

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squarelyfe

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NORCAL USA
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Larry
Truck Year
1975
Truck Model
k25
Engine Size
350
Can anyone show me what this pin normally looks like? My speedo isn't working, today I tried to spin the cable to make the needle moves in the cluster using a drill. It spun it so the cable end isn't broken. I removed the gear reduction part and when I left this pin in it wasn't trying to spin the gear inside the tail shaft or feel any pressure. Either this pin is the problem or the 7t plastic shaft gear is toast. For kicks I screwed the cable back in with out reduction part. Tomorrow I get to see it it moves or not. That will tell me if the gear inside is bad. But still.. wtf is up with this pin to other gear? It just looks strange and don't see how something else is turning it. The keyed end goes into the reduction part. Having a hard time understanding what happens to the other end. I imagine it's supposed to work like the cable but it doesn't look right. Anyone have a photo of what that pin should look like? See photos..
 

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squarelyfe

Full Access Member
Joined
Nov 8, 2021
Posts
174
Reaction score
104
Location
NORCAL USA
First Name
Larry
Truck Year
1975
Truck Model
k25
Engine Size
350
It's possible I need one of these, the key isn't square all the way down on the old one.
 

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