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Thread: what is best gear oil to use on old eaton drive?

  1. #1
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    what is best gear oil to use on old eaton drive?

    I have my old Eaton series sixteen outdrive on my 1966 16 Ski Sporter and yes it still runs fine. The manual calls out for "a first grade, heavy duty gear oil, SAE 90 weight, containing Sulphur-Chlorine-Lead additive - or Eaton p/n L-100"

    Anyone have some idea of what to use these days? I don't mind paying for whatever is the best.
    Bob

    Covington, Washington
    1966 Donzi 16' Hull #16-226



    here are some short videos...

    a little video clip of our boat idling over to the boat launch so you can hear it.
    http://www.youtube.com/v/GSx8zAmi3R0

    Eaton outdrive rotating 101
    http://www.youtube.com/watch?v=auaFB...yer_detailpage

    thread on our boat
    http://www.donzi.net/forums/showthread.php?t=61975


    Video of the boat on the trailer

    http://www.youtube.com/watch?v=S9qXz4CJS8U

  2. #2
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    Still in process of doing some looking and Amsoil, Redline and Torco all have Gear Oils they recommend, but they don't specifically know compatibility for the Eaton unit. I was reading that the cone-clutch may need specific properties, but I have the clutch dog? in the eaton. So I am still making phone calls and inquiries on this one...
    Bob

    Covington, Washington
    1966 Donzi 16' Hull #16-226



    here are some short videos...

    a little video clip of our boat idling over to the boat launch so you can hear it.
    http://www.youtube.com/v/GSx8zAmi3R0

    Eaton outdrive rotating 101
    http://www.youtube.com/watch?v=auaFB...yer_detailpage

    thread on our boat
    http://www.donzi.net/forums/showthread.php?t=61975


    Video of the boat on the trailer

    http://www.youtube.com/watch?v=S9qXz4CJS8U

  3. #3
    mrfixxall Guest

    Fixx

    From what i hear the redlind shock proof is the best on the market..

  4. #4
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    I serviced some Eatons years back, one of the most important add-ons is a shower. The uppers get very hot due to inadequate oil circulation, keep them cool they will run a long time.
    No matter what your beliefs are "GOD BLESS AMERICA"

    Semi retired marine tech over 50 years in the biz.

  5. #5
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    Quote Originally Posted by MOP View Post
    I serviced some Eatons years back, one of the most important add-ons is a shower. The uppers get very hot due to inadequate oil circulation, keep them cool they will run a long time.
    2010 - 1966 = a long time!


    Member: Red Boat Club
    1996 22' Classic
    Volvo 7.4GSi/DPX (E-4 props)
    bone stock 72.8 gps mph

  6. #6
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    LOL...that's what I was going to say. It has been going a long time for that drive to keep running, but maybe a shower would have extended it to a really long time.

    I am considering the redline along with Torco and Amsoil, but just want to know for sure what is proven to be okay to use.
    Bob

    Covington, Washington
    1966 Donzi 16' Hull #16-226



    here are some short videos...

    a little video clip of our boat idling over to the boat launch so you can hear it.
    http://www.youtube.com/v/GSx8zAmi3R0

    Eaton outdrive rotating 101
    http://www.youtube.com/watch?v=auaFB...yer_detailpage

    thread on our boat
    http://www.donzi.net/forums/showthread.php?t=61975


    Video of the boat on the trailer

    http://www.youtube.com/watch?v=S9qXz4CJS8U

  7. #7
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    Any of them would work fine.

    Use a 75w-90 full synthetic.

    Make sure they have a GL-5 rating which I am sure they all do.

    Ken

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    I agree with Ken.. The Company he works for also makes a very good oil ( Spectro ) I have used it in the past & still use it for some applications. It works & holds up very well. We also use some other oils for different applications. I believe that Ken could probably get you what you need if you contact him, He is a nice guy too.. Jamie / Lakeside

  9. #9
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    Thanks Jamie (and Ken),
    Appreciate the guidance, this has been a confusing one
    Bob

    Covington, Washington
    1966 Donzi 16' Hull #16-226



    here are some short videos...

    a little video clip of our boat idling over to the boat launch so you can hear it.
    http://www.youtube.com/v/GSx8zAmi3R0

    Eaton outdrive rotating 101
    http://www.youtube.com/watch?v=auaFB...yer_detailpage

    thread on our boat
    http://www.donzi.net/forums/showthread.php?t=61975


    Video of the boat on the trailer

    http://www.youtube.com/watch?v=S9qXz4CJS8U

  10. #10
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    Just so I am clear...

    the GL-5 is the right one for my drive, but does my drive have spiral bevel and hypoid gears? Here is what I found on Wikipedia for the difference between GL-4 and GL-5 oils ...

    GL-4 and GL-5 are standards set by the American Petroleum Institute for gear oils. GL-4 are intended for axles with spiral bevel and hypoid gears operating under moderate to severe conditions of speeds and loads. They are also suitable for sychronized manual transmissions when MT-1 gear oils are NOT recommended. GL-4 should be used in limited-slip differentials. The GL-4 generally indicates "Limited Slip" properties in the gear oil; sometimes abbreviated as LS.
    GL-5 is indicated for high-speed/shock loads and low-speed/high-torque conditions. GL-5 also has multi-purpose or mild EP (extreme) properties too. GL-5 is often seen with the MT-1 designation too.
    MT-1 indicates lubricants intended for NON-sychronized manual transmissions. MT-1 indicates the additional additives necessary to protect against thermal degradation, component wear and oil-seal deterioration which are not requirements by GL-4 or GL-5 approval.
    GL-5 is not the latest and greatest improvement over GL-4; unlike oil classifications where higher classification numbers mean tougher standards and backward compatiblity. It is important to know what type of gears you are lubricating, their applications and follow the manufacturer's recommendations! More information can be found at www.api.org.
    Bob

    Covington, Washington
    1966 Donzi 16' Hull #16-226



    here are some short videos...

    a little video clip of our boat idling over to the boat launch so you can hear it.
    http://www.youtube.com/v/GSx8zAmi3R0

    Eaton outdrive rotating 101
    http://www.youtube.com/watch?v=auaFB...yer_detailpage

    thread on our boat
    http://www.donzi.net/forums/showthread.php?t=61975


    Video of the boat on the trailer

    http://www.youtube.com/watch?v=S9qXz4CJS8U

  11. #11
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    I think what Ken meant was that the GL5 rating regardless of how your gears are cut is much better that the oil that was used in your drive when it was new. The GL5 rating meets & exceeds just about every outdrive requirement out there for the most part. At least for volvo units, dana, eaton and merc bravo & alpha units to date.. Jamie

  12. #12
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    Quote Originally Posted by LKSD View Post
    I think what Ken meant was that the GL5 rating regardless of how your gears are cut is much better that the oil that was used in your drive when it was new. The GL5 rating meets & exceeds just about every outdrive requirement out there for the most part. At least for volvo units, dana, eaton and merc bravo & alpha units to date.. Jamie
    Correct.

    Ken

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    Thanks, and yes I know you are both correct and I am feeling much more confident about just buying some GL-5. My biggest concerns were whether there was any issue with "over slipperiness" as it would affect a cone type clutch by not allowing the friction it needed to engage (even though I have a clutch dog) and whether the designation of "hypoid" was a big deal or necessary for my application.

    So right now my choices that I feel good about are:

    Spectro 75W90?
    Redline 75W90 GL-5
    Amsoil 80W90 Marine Gear Lube AGM
    Torco ?
    Bob

    Covington, Washington
    1966 Donzi 16' Hull #16-226



    here are some short videos...

    a little video clip of our boat idling over to the boat launch so you can hear it.
    http://www.youtube.com/v/GSx8zAmi3R0

    Eaton outdrive rotating 101
    http://www.youtube.com/watch?v=auaFB...yer_detailpage

    thread on our boat
    http://www.donzi.net/forums/showthread.php?t=61975


    Video of the boat on the trailer

    http://www.youtube.com/watch?v=S9qXz4CJS8U

  14. #14
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    Thanks for all the help and input you guys. Between this site and BITOG I have received some helpful advice from people who know a lot more than I do about the "oil" subject. I have made my short lists for Sterndrive gear oil, grease for trailer wheels and outdrive yoke and also for the engine oil to use.

    My stern drive gear oil choices are...
    * Redline Heavy Shock Proof 75W90 (GL-5) (Leaning towards this one)
    * Redline Gear Oil 75W90 (GL-5+)
    * Amsoil Marine Gear Lube (AGM) 75W/80W-90

    choices for waterproof grease for the trailer wheels and outdrive yoke are..
    * Redline CV-2 Grease
    * Amsoil Synthetic Water Resistant Lithium Complex Grease (GWR)

    Final Choice for Motor Oil is:
    * Torco SR-1 5W30


    Any comments or last minute "no, not that one you fool!" advice?

    I'm pretty sure whichever I choose from the list I should be better than what I am running now. Thanks again everyone for answering my endless questions
    Bob

    Covington, Washington
    1966 Donzi 16' Hull #16-226



    here are some short videos...

    a little video clip of our boat idling over to the boat launch so you can hear it.
    http://www.youtube.com/v/GSx8zAmi3R0

    Eaton outdrive rotating 101
    http://www.youtube.com/watch?v=auaFB...yer_detailpage

    thread on our boat
    http://www.donzi.net/forums/showthread.php?t=61975


    Video of the boat on the trailer

    http://www.youtube.com/watch?v=S9qXz4CJS8U

  15. #15
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    Quote Originally Posted by BobinCovington View Post
    Thanks for all the help and input you guys. Between this site and BITOG I have received some helpful advice from people who know a lot more than I do about the "oil" subject. I have made my short lists for Sterndrive gear oil, grease for trailer wheels and outdrive yoke and also for the engine oil to use.

    My stern drive gear oil choices are...
    * Redline Heavy Shock Proof 75W90 (GL-5) (Leaning towards this one)
    * Redline Gear Oil 75W90 (GL-5+)
    * Amsoil Marine Gear Lube (AGM) 75W/80W-90

    choices for waterproof grease for the trailer wheels and outdrive yoke are..
    * Redline CV-2 Grease
    * Amsoil Synthetic Water Resistant Lithium Complex Grease (GWR)

    Final Choice for Motor Oil is:
    * Torco SR-1 5W20


    Any comments or last minute "no, not that one you fool!" advice?

    I'm pretty sure whichever I choose from the list I should be better than what I am running now. Thanks again everyone for answering my endless questions
    I would be hesitant to run anything less than a 30 wt oil in a marine engine..

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