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Jumping speedo 140-160 1974

posted by  someone claiming to be Kåre on  Tue May 2 17:40 CST 2006 [RELATED]

Hi,
Wnodering if somebody have experienced this problem. The needle on my speedo starts jumping above about 45 mph. I just replaced the speedo cable taking for granted it was the problem. It didn't make a difference. Is it possible to the outlet from the transmission is causing this? I was careful to route the new cable the same way as the old with no sharp bends.

Thanks,

Kåre







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    Jumping speedo 140-160 1974

    posted by  someone claiming to be geof on  Wed May 3 07:55 CST 2006 [RELATED]

    When my speedometer needle (on a 1974 145) was jumping, a Volvo mechanic wouldn't look at it. He was certain it was the speedometer itself. I took it to an instrument shop where it was cleaned and calibrated.







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    Jumping speedo 140-160 1974

    uid 25346's pic
    posted by  GT144 on  Tue May 2 22:27 CST 2006
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 24 04:32 CST 2014
    [RELATED]

    Its probably the speedo meter itself. Not sure how to fix it. On my 74 144, I replaced it with one from a 76 244. Be careful of the markings at the bottom of the speedo meter face. They have different ratios and the readings might vary slightly. If I am not mistaken, one is 1.03(usually found on manuals), and the other is 0.98(usually auto).
    --
    ...and the bricks keep on rolling








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      Jumping speedo 140-160 1974

      posted by  someone claiming to be Kåre on  Wed May 3 17:22 CST 2006 [RELATED]

      My speedo says 1.03 and I also just checked the rear axle and it says (if I read it correctly) ratio 4,10. My odometer doesn't work either, so maybe the speedo is due for an overhaul.
      The reason I thought it was the speedo cable is that I once had this identical problem on a 71 142 and the new cable fixed the problem then (25 years ago).
      I'll take out the speedo and see if I can find something obvious. Does anyone know where I can get a new gear for the odometer? I thought I read somewhere that somebody makes these gears, at least for the 240?

      Kåre








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        Jumping speedo 140-160 1974

        uid 25346's pic
        posted by  GT144 on  Thu May 4 00:42 CST 2006
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
        last visit: Fri Oct 24 04:32 CST 2014
        [RELATED]

        Could be the speedo cable. When they start to fray, the reading foes erratic. Happened to me also.

        Here's the link. Should work with you speedo too, since the earlier 244s had the same one.

        http://www.odometergears.com/

        It looks like your 74 144 is quite similar to mine. Mine originally was also Glacier White, 1.03 speedo and 4.10 rear end, with the M40. Except that being a Euro edition, mine came with a single ZS, yours is FI.

        I replaced my speedo from a 244 with the 0.98 ratio. Works well, but if you are going 50mph, it will register 45, and so on. As expected, the odometer quit few months ago, the prime suspect being that pesky plastic gear.

        --
        ...and the bricks keep on rolling








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    Oops, sorry about gigantic pic.... 140-160 1974

    posted by  someone claiming to be Kåre on  Tue May 2 17:42 CST 2006 [RELATED]







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