1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Verifying Before Buying Gl4 And Other Lubs

Discussion in 'Early CJ-5 and CJ-6 Tech' started by mickeykelley, Sep 13, 2018.

  1. Sep 13, 2018
    mickeykelley

    mickeykelley Well-Known Member

    Republic of Texas
    Joined:
    Oct 10, 2015
    Messages:
    1,508
    So as I've read numerous prior posts, I just want to confirm as I get ready to 'stock' fluids I need. The GL4, like Sta-lube, is NOT synthetic and we do NOT want to use synthetic in these old units, especially if we are just topping off fluids. The GL4 is used for the differentials, the tranny, the transfer case and the PTO and the Ross steering box. The corn grease is used in the knuckles only. Oil is up for debate on convention vs synthetic. Since I have both a CJ5 and a Willys wagon, I'm thinking just get enough to have on hand. When inspecting both differentials, I might as well change fluids and gaskets so how much should I expect to use on those initially?
     
  2. Sep 13, 2018
    colojeepguy

    colojeepguy Colorado Springs Sponsor 2019 Sponsor

    At the foot of...
    Joined:
    Apr 4, 2010
    Messages:
    4,338
    Yes, GL4 in the trans and tcase specifically, you can use GL4 or GL5 in the diffs. Personally, I make my own "knuckle pudding" for the knuckles, I think the cornhead is too thick.
     
  3. Sep 13, 2018
    73 cj5

    73 cj5 Not ready for the junkyard yet Sponsor

    MS
    Joined:
    Jan 10, 2014
    Messages:
    1,023
    71CJ54WD and Hellion like this.
  4. Sep 13, 2018
    Rick Whitson

    Rick Whitson Detroit Area Sponsor 2019 Sponsor

    I live South of...
    Joined:
    Dec 2, 2014
    Messages:
    1,010
    I got Sta-Lub GL4 at Napa in Michigan. The guy there also showed me some GL 4 in Marine lower unit lub. Good Luck
     
  5. Sep 13, 2018
    PeteL

    PeteL Member Sponsor 2019 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    6,391
    Just don't believe the counter people who say "it's the same thing" when they try to sell you a GL-5.
     
    ojgrsoi likes this.
  6. Sep 13, 2018
    70cj5134f

    70cj5134f Member

    East Tn
    Joined:
    Aug 18, 2018
    Messages:
    662
    Buy a case (12) qts, and your covered.
    I Also make my own knuckle mash?
     
  7. Sep 13, 2018
    TIm E

    TIm E Member Sponsor 2019 Sponsor

    NW Arkansas
    Joined:
    Mar 2, 2017
    Messages:
    630
    Another option is Brian Hainer (Metalshaper on youtube). metalshaper@comcast.net

    If you watch some of his videos, easy to see he knows his stuff. He has worked with engineers from lubrication companies to formulate the correct lubes for these old Jeeps (talks about it in some of his videos). Not inexpensive, but after all the work that goes into rebuilding something, probably smart to make sure to use the correct lubes...and I figure part of it supports his channel.
     
    Cowboyjeeper and montanacj like this.
  8. Sep 13, 2018
    Keys5a

    Keys5a Sponsor Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
    Messages:
    2,204
    X2
    -Donny
     
  9. Sep 13, 2018
    Daryl

    Daryl Sponsor Sponsor

    Bonney Lake, WA
    Joined:
    May 25, 2006
    Messages:
    2,800
    Does anyone have any actual verifiable self experience with any 90 weight actually doing real harm. I personally have seen ZERO problems in any gear case of any type that can be caused by having the wrong oil. Not having oil is a big problem but this all seems to be internet hysteria that is simply repeated until it is put up as FACT. I would love to see a picture of a gearbox that has been sitting for years with the "wrong" oil in it and show deterioration of the "yellow" metals that are under the oil fill line and are perfect above the oil.
     
    jpflat2a likes this.
  10. Sep 13, 2018
    grassfed

    grassfed New Member

    NW Arkansas
    Joined:
    Aug 23, 2018
    Messages:
    2
    GL-4, GL-5, 90 weight...all better options than what came out of my transmission. IMG_20180908_090828018.jpg
     
  11. Sep 13, 2018
    nickmil

    nickmil In mothballs. Sponsor

    Happy Valley, OR
    Joined:
    Sep 23, 2002
    Messages:
    11,440
    I have not seen it cause damage. I have seen hard shifting, grinding going into gear, and the resulting damage caused by that from using GL-5 in a transmission that requires GL-4. I've seen it many, many times and experienced it firsthand in my own gearbox.
     
  12. Sep 13, 2018
    Daryl

    Daryl Sponsor Sponsor

    Bonney Lake, WA
    Joined:
    May 25, 2006
    Messages:
    2,800
    I have seen gearboxes and overdrives not shift well with synthetic 90 weight also. I see people saying that it eats the yellow metal and just wonder if there is anything anywhere to back that up.
     
  13. Sep 13, 2018
    Twin2

    Twin2 wasn't me Sponsor 2019 Sponsor

    Virginia Beach, VA
    Joined:
    Apr 28, 2011
    Messages:
    3,804
    somebody has been playing in water . I be checking the diff's too
    [​IMG]
     
  14. Sep 13, 2018
    montanacj

    montanacj Sponsor Sponsor

    Joined:
    Jul 11, 2012
    Messages:
    684
    The lube chart for these Jeeps shows capacities just google it, for what it’s worth I use the Sta lube gl4

    Here is a fuzzy version

    [​IMG]
     
  15. Sep 13, 2018
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    5,806
    PeteL likes this.
  16. Sep 13, 2018
    Greevesman

    Greevesman Sponsor Sponsor

    Napa, Ca
    Joined:
    Oct 12, 2014
    Messages:
    326
    Why take a chance when GL4 is available?
     
  17. Sep 13, 2018
    Keys5a

    Keys5a Sponsor Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
    Messages:
    2,204
    I have 2 brass syncro blocking rings from a '62 Austin Healey that I replaced about 18 years ago. The gearbox had been rebuilt about 5 years prior to this, and had less than 300 miles on it. It sat for nearly that length of time. The gear oil was extremely clean, but both syncros had areas of deep erosion on the surface in random spots, including the ridged wear surface, causing the grind when shifting quickly. I can't confirm it was from GL5, but I will bet that was the culpret. I'll see if I can dig them out.
    -Donny
     
    Twin2 and Daryl like this.
  18. Sep 14, 2018
    colojeepguy

    colojeepguy Colorado Springs Sponsor 2019 Sponsor

    At the foot of...
    Joined:
    Apr 4, 2010
    Messages:
    4,338
    This has been my experience as well.
     
  19. Sep 18, 2018
    grassfed

    grassfed New Member

    NW Arkansas
    Joined:
    Aug 23, 2018
    Messages:
    2
    [​IMG] IMG_20180908_093054437.jpg
    This is the Jeep I just bought with no engine. I'm sure it has been out in the rain for years gathering water in the cases. The good news is the breather has been working perfectly.

    The water displaced all the gear oil through the breather vent like the Brady Bunch volcano.
     
    Last edited: Sep 18, 2018
    Hellion, Muzikp and TIm E like this.
  20. Nov 28, 2018
    Hellion

    Hellion Rust covered & junky

    Eastern TN
    Joined:
    Dec 25, 2016
    Messages:
    507
    Now I know his name, thanks.[​IMG]

    That guy is an intriguing YouTube personality--seen a few of his videos, those mentioning lubes especially, and am impressed and already believing his claim that he has "the right stuff".

    The gear oil he pumped into the open top of his T90 looked really good with great 'clinging' properties during the demonstration he did. Same good feelings with his steering box lube, etc.

    He always says to email him to order and get prices on the lubricants which all seems a bit awkward and mysterious. In other words, he might do real well with a website and some honest exposure and our patronage, for one.

    Did you order any lube from him, @TIm E ?
     
    Last edited: Nov 28, 2018

Share This Page

New Posts