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68 W100 3 speed

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  • 68 W100 3 speed

    After owning my truck for over 25 years I find out the 3 speed manual transmission calls for automatic transmission fluid as lubricant. It never had anything but gear lube in it .It leaks some as well ,seems transmission fluid would leak a bit more. Anyone know why automatic transmission was used.

  • #2
    Either will work. Where did you read that it called for ATF?

    Bucky

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    • #3
      In the shop manual under lubrication ... It lists automatic transmission fluid Type AQATF-2351 A suffix A and it states SAE 90 multi purpose gear lube may be used in warm climates

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      • #4
        In a 1979 owner's manual it lists ATF for the 3-speeds & the 833 4-speed, and lists gear oil for the 435/445 4-speeds.

        Bucky

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