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  1. C

    Fixing the speedo via a plastic gear?

    Will do sometime in the next few days. I'll just be getting the truck back tomorrow after replacing the engine, complete exhaust system and complete brake overhaul. Thanks again.
  2. C

    Fixing the speedo via a plastic gear?

    Then perhaps you could help me? 235/75/15 tires and 2.73 rear diff gears in an '84 c10 2wd w/700c4?
  3. C

    Speedo gear?

    Thanks. It's definitely still a 700r4, it still has overdrive. I just think due to finding water in the rear diff and rusted brake lines that sometime in it's life this truck was partially flooded, ruining the trans that was in it, necessitating its replacement. Just piecing together evidence...
  4. C

    Speedo gear?

    Thanks for the info. What I keep hoping to find is what originally came in that truck, so I could just remove and replace all in one step rather than identifying what's there first since I already know it's wrong. I do, however, understand that I may have to start with pulling the old one and...
  5. C

    Fixing the speedo via a plastic gear?

    Hi, new member here. I have a similar question, already posted it in the introduction section. I'm hoping you might be able to help? I have an 84 C10 with a 700R4 and 235/75/15 tires, rear axle is 2.73. My speedo is reading 18-20 mph too fast. I suspect someone changed the trans and the donor...
  6. C

    Speedo gear?

    Hi, new to this site. I recently acquired a 1984 C10, longbed fleetside. The speedometer is reading way too fast, off maybe 18-20 mph at highway speeds. I suspect the trans (700R4) has been replaced with a unit from another vehicle that had a different axle ratio or tire size. The tires are the...

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