Question Rear Axle Servicing

Discussion in '6.0L PowerStroke Engine & Drivetrain' started by troutwest66, Jul 25, 2016.

  1. DaveBen

    DaveBen SDD Senior Member

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    Yes it was the fill level plug. Most people remove the cover to drain the gear oil, I do. Your choice. I do not know anybody who has done that. Maybe someone will chime in.
     
  2. BIG JOE

    BIG JOE Full Access Member

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    Not only the drill & tap cost... I'm think'n: when the Bumper to Bumper Warranty length(s) went up to what they are today... and the improvements in Oils & Lubes (synthetics).. these dayz.. the Dif drain plug jus' became.. "Old School", and un-necessary ?

    AND... They don't want US to be mess'n with anything anymore.. because of the above.

    Kinda sad though cuz those of us that still Turn Wrenches...... WE know what needs to be done.. based on how we've used our equipment ? "Life Time" anything.. just don't git it ?

    Old School Joe :fogey;):)
     
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  3. f100cleveland

    f100cleveland When In Doubt,THROTTLE ON

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    I tried Royal Purple syn oil. It was said to improve rear limited slip but no difference. Nothing wrong with Royal Purple rear end grease just the newer trucks have decent lockers but old limited slips never worked.
     
  4. 01yellerCobra

    01yellerCobra Full Access Member

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    I've tried Royal Purple oil and gear oil in the past. I didn't see any change or improvement that justified the cost. So I haven't bothered with it since.
     
  5. troutwest66

    troutwest66 6.0- The Dark Side!

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    I used the Valvoline Synthetic in my '94 and had no problems so I feel pretty good using it this time, too. I get a discount at my NAPA through the school district as well.
     
  6. Tbar

    Tbar SDD STAFF/Moderator Staff Member

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    The AMSOIL folks said I wouldn't need the friction modifier additive when using their gear oil. I was skeptical but had no problems without it.
     
  7. BIG JOE

    BIG JOE Full Access Member

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  8. john griffin

    john griffin Full Access Member

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    I used Amsoil "regular" (silver bottle) gear lube for 10 years and always had to add friction modifyer.The sd would chatter like a squirell in heat if I didnt.I switched to thier "severe Gear" (black bottle) and it works fine w/o any additives.I change it every year not because I think the oil is used up(I know it isnt) but so that I can check for wear particals.Have never found any and spent a bit of $ on gear lube and atf (transfer case) but I feel better.
     
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  9. carbonation

    carbonation SDD Junior Member

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    First change really should be early. Between 5 and 10k IMO. Lots of metal that gets shedded when new.
    Then every 30-40k after that if towing.
    75w140. I ran Valvoline Syn-Power for a long time. It's a fine lubricant when changed at the proper interval, and I never needed additional friction modifier add.
    The aluminum Ford cover is a cheap upgrade, and can drop temp about 20 degrees vs. the stamped steelie.
    8C3Z-4033-A, various retailers on the web. Usually available for about 60.00
    I like ARP P/N 612-1250 to bolt it on with. Stainless, and just the right, slightly longer, length for the aluminum cover.
     
    Last edited: Mar 18, 2018
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  10. carbonation

    carbonation SDD Junior Member

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    It looks like a new option has arrived.
    Jegs has a private label cover with a drain bung tapped in at the bottom.
    I still like Valvoline 75w140, available lots of places.
    Need a bargain? WM.com has 75w140 Transtar for less than 10 a quart and free shipping.

    https://www.jegs.com/i/JEGS/555/62556/10002/-1
     
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