F250 transmission/Diff oil change

Discussion in '1961 - 1966 Ford F100, F250 and F350 Truck Forum' started by ODST105, Aug 2, 2016.

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  1. ODST105

    I got a 64 F250 two wheel drive and got really want to change to oils, how much oil do I need in the manual gearbox and the differential?
     
    ODST105, Aug 2, 2016
    #1
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  2. FTZ HAIC Staff Member Oregon Chapter Founding Member

    I don't know about the specific amounts in quarts, but with both you fill it up to the level of the fill plug, no less.
     
    FTZ HAIC, Aug 2, 2016
    #2

  3. ODST105

    Ok thanks, I heard on some diffs and boxes that it need to be halfway filled, all the way filled and and finger length away from the hole to be full
     
    ODST105, Aug 2, 2016
    #3

  4. FTZ HAIC Staff Member Oregon Chapter Founding Member

    Since you did not supply is what gear box and differential you have, I assumed a Ford 9", it being a 4x2. If you have a Dana, it depends on which cover you have. What differential is it?

    For manuals, I've always filled to the hole, same with transfer cases.
     
    FTZ HAIC, Aug 3, 2016
    #4

  5. dustybumpers Article Contributor Founding Member

    All the rears and manual transmission get filled until the oil just starts to run back out
    Anything less, will cause overheating, and bearing failure
    Especially outer axle bearings

    Locking and clutch type rears require an additive to reduce friction, and keep the clutches from chattering and wearing out
     
    dustybumpers, Aug 3, 2016
    #5

  6. ODST105

    Thanks guys, the transmission is a T98 and I cleaned the goop off the differential and I found a tag on one the bolts that says "Use Limited Slip, Use limited" and some numbers on the rear axle.
     
    ODST105, Aug 3, 2016
    #6

  7. FTZ HAIC Staff Member Oregon Chapter Founding Member

    Get the gear oil with the limited slip additive already in it. You won't need to worry about getting the mix ratio wrong that way.
     
    FTZ HAIC, Aug 4, 2016
    #7
    dustybumpers likes this.
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