Max. weight for synthetic t-case gear oil?

Discussion in '60-Series Wagons' started by Timoss, Aug 12, 2005.

  1. Timoss

    Timoss

    Messages:
    233
    Likes Received:
    0
    Joined:
    Oct 7, 2004
    Anyone know how thick you can go with synthetic in your t-case? I'd like to try queiting my gears a bit but don't want to do any damage...

    Thanks,

    Tim
    88 fj62 TLCA
     
  2. lovetoski

    lovetoski SILVER Star

    Messages:
    4,562
    Likes Received:
    233
    Joined:
    Jul 13, 2003
    I've heard that Redline Gear Oil is great for transfer cases...esp ones that are worn. Is your's leaking? Why are you thinking of going thicker?
     
  3. overhanger

    overhanger

    Messages:
    1,070
    Likes Received:
    281
    Joined:
    Jun 11, 2004
    75-140 is about as heavy as it gets, AFAIK, Tim. Those Mark's gears a little noisey, are they?
     
  4. cahilc

    cahilc

    Messages:
    1,067
    Likes Received:
    2
    Joined:
    Mar 15, 2004
    Location:
    Dry Fork, WV
    What have you been using ? Is it conditioned for limited slip applications ?

    IMO, going heavier will yield marginal results. You need better quality oil. I did some experimenting using convertional mineral base and then switching to a conventional mineral base with limited slip conditioner.

    Note: The limited slip conditioner was already in the oil.

    Took the noise down a definite notch. Not quiet ... to hear a pin drop, but definitely an improvement.

    Somebody else wil have to comment on the synthetics. I'm not a fan of running synthetics in our trucks in *general* unless there is a *specific* reason.

    Cahil
     
  5. lovetoski

    lovetoski SILVER Star

    Messages:
    4,562
    Likes Received:
    233
    Joined:
    Jul 13, 2003
    Ahhh, so it's because of the Marks gears...

    Instead of changing the oil, why not use some noise abatement materials on the floor?
     
  6. Timoss

    Timoss

    Messages:
    233
    Likes Received:
    0
    Joined:
    Oct 7, 2004
    Out of town or would have replied earlier: yes, it's the Mark's Gears. Not horribly loud but wouldn't mind quiting them a bit. Sounds now EXACTLY like a worn t-case gear whine (at least exactly like my brother's fj62 t-case sounds. Someday when I move to the Great Interior Makeover (pull out cargo drawers, decent stereo, etc.) I will add more sound proofing to the truck as well. But I heard that thicker synthetic gear oil will make the t-case a bit quieter than plain ol' 90wt...

    Tim
    88 fj62 TLCA
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.