Manual 3 speed fluid type

Discussion in 'Transmissions' started by heliboy, Dec 19, 2012.

  1. heliboy

    heliboy 76' Mav

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    I'm old school (or just old maybe), but my 76' has a 73' 3 speed manual floor shift, and I was wondering what the fluid type is so I can change it while I have it out.
     
    heliboy, Dec 19, 2012
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  2. Krazy Comet

    Krazy Comet Tom

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    These days most use 75W-140 that will make shifting easier when cold and provide better protection when hot than the straight weights of old...

    What was recommended 40 years ago has been replaced by better lubricants...
     
    Krazy Comet, Dec 19, 2012
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  3. mav1970

    mav1970 Bob Hatcher

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    The old weight, that I remember, was 90w - 120 gear oil
     
    mav1970, Dec 19, 2012
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  4. heliboy

    heliboy 76' Mav

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    Thanks guys! All the info. is greatly appreciated.
     
    heliboy, Dec 19, 2012
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  5. tody

    tody Member

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    gear oil with API GL-4 specification...
     
    tody, Dec 19, 2012
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  6. heliboy

    heliboy 76' Mav

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    What about synthetics? Are they better than standard gear oils?
     
    heliboy, Dec 19, 2012
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  7. 71gold

    71gold Frank Cooper Supporting Member

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    ...no...:tiphat:
     
    71gold, Dec 19, 2012
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  8. heliboy

    heliboy 76' Mav

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    Thank you guys!
     
    heliboy, Dec 19, 2012
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  9. baddad457

    baddad457 Member

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    Non synthetic, 90-140 is what works best in the Old Toploader 3 and 4 speeds.
     
    baddad457, Dec 20, 2012
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  10. heliboy

    heliboy 76' Mav

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    Any particular brands better than others?
     
    heliboy, Dec 22, 2012
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  11. heliboy

    heliboy 76' Mav

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    Found 75w140 (mostly synthetic), but no 90w140. Any suggestions?
     
    heliboy, Dec 22, 2012
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  12. baddad457

    baddad457 Member

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    Nope, this isn't what you'd call a "high-tech" deal here. Steel gears with brass blocker rings, nuthin fancy inside them. 75-140 will do too. I wouldn't use the synthetic though.
     
    baddad457, Dec 22, 2012
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