"Papa Smurf" - 1966 GMC 1500 Custom

[LordNatedawg]

Originally Posted by James

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Maybe this will help:

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That absolutely helped. Exactly the same as the old one. It fit and my speedometer worked for all of 3 miles before I heard a ratcheting sound in the transmission and the needle started to "float" around 15mph. Then I heard nothing and the speedometer dropped out. I'm willing to bet the plastic drive gear has given up. I didn't bring my borescope home so I can't confirm that yet. But the adapter key is one problem solved. Overall success!

On the bright side, I managed to resurface my drums at work today. Braking vibration is now completely gone. My truck also seems to be coasting better. The left drum needed .030 to clean up. The right drum needed .015. After a 20 mile test drive I checked the temperature of my brakes. Both front discs were hot, but I could touch them without getting instant burns. That's normal, in my experience. The left rear drum was kind of warm, and the right rear was warm. A noticeable temperature difference existed but it was nothing drastic. The fact that I can touch all 4 without getting burnt means that I am no longer overheating.

Now I just need to monitor my front and rear brakes closely to make sure it doesn't happen again. I'm pretty sure I solved my brake problems, but we'll have to wait and see.

The attached photo shows the right drum after the first cut. Just one small low spot remained.


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And here's a video showing the left drum being cut. It only shows the initial skim cut, but you can hear just how little the cutting bit is making contact with the drum. Please excuse the shakiness. I was trying to operate a lathe and record at the same time.

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