Motul Gear 300 in Rear Diff
Results 1 to 10 of 10

This is a discussion on Motul Gear 300 in Rear Diff within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I am getting 5 liters of Motul Gear 300 for my MT, which only requires 3.5 liters. So I will ...

  1. #1
    Registered User KanosWRX's Avatar
    Join Date
    Dec 2001
    Location
    Northern VA
    Posts
    3,975

    Motul Gear 300 in Rear Diff

    I am getting 5 liters of Motul Gear 300 for my MT, which only requires 3.5 liters. So I will have atleast 1 liter left for the .8 required in the Rear Diff. Does anyone not recommend Gear 300 in the rear diff?


    My Mods


    "The most important mod is the one behind the steering wheel" - Koyokid RIP

  2. Remove Advertisements
    ClubWRX.net
    Advertisements
     

  3. #2
    Registered User Acrdys's Avatar
    Join Date
    Jun 2007
    Location
    Lemore
    Posts
    1,117
    Quote Originally Posted by KanosWRX View Post
    I am getting 5 liters of Motul Gear 300 for my MT, which only requires 3.5 liters. So I will have atleast 1 liter left for the .8 required in the Rear Diff. Does anyone not recommend Gear 300 in the rear diff?
    yeah i beleive is 3.8 for the tranny and just keep pouring in the rear diff until it starts spewing out

    I just did used motul gear 300 on my rear diff. Took it for a run and didn't feel a difference (duh) I just wanted to check leaks

    Jacked the car back up and did my tranny. Feels awsome.

    I ended up using 5 bottles and some left over.
    Hawk-Eye Alliance#8089
    MODS LIST

  4. #3
    Registered User Truckster27's Avatar
    Join Date
    Mar 2006
    Location
    Everywhere
    Posts
    560
    Yeah, you should be fine with that. Go to the transmission sticky that you'll find in the maintenance forum, it'll tell you all the variations that people use. As for filling the diff, remove both plugs, let drain, then replace the bottom plug. Fill until it starts to come out the top plug hole.

    For the tranny, get a funnel with a long flexible tube end. Fill as you go, but do not overfill too much. too much will cause it to foam, and that can bad for gear life.
    Movn' on up to an '06 WRX
    Vf-39 all the way!

    Love to build 'em, just to ship 'em out and start all over!

    I got friends in cyberspace, so I must be cool, right?
    Facebook / Myspace

  5. #4
    He simply abides. SD_GR's Avatar
    Join Date
    Jul 2002
    Location
    CA, US
    Posts
    22,601
    I Support ClubWRX
    Quote Originally Posted by KanosWRX View Post
    Does anyone not recommend Gear 300 in the rear diff?
    I don't recommend Motul 300 in the rear differential.

    You will likely not need all the volume specified for the gearbox. You should add some, check level, add some more and so on until the level is correct. It is likely you will find that you are using less than 3,8L (or whatever is specified). Although overfilling is not a problem (the gearbox is vented and excess will spill out onto the ground) as you now know Motul 300 is not free.

    Save it for the next gearbox fill instead, and use something else of the correct specification (see owner's manual) for the rear differential -- something inexpensive and readily available. This saves you money.
    WRX Info Links, Courtesy TheJ
    The world breaks everyone and afterward many are strong in the broken places. Ernest Hemingway
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

  6. #5
    Resident meany-rator 06wrx4me's Avatar
    Join Date
    Jun 2006
    Location
    Nor Cal
    Posts
    11,438
    I Support ClubWRX
    Yeah don't add the full 3.8L no matter what the dipstick says. Add about 3.25L and check it. If it is registering on the stick, get in and drive it around slowly, then come back and recheck. You'll find that the transmission magically made fluid appear.
    2014 Ford Fiesta ST

    06 WRX, HAWKEYE # 001 <T-boned and sold>

    COILOVER TABLE
    TURBO TABLE

  7. #6
    Registered User Truckster27's Avatar
    Join Date
    Mar 2006
    Location
    Everywhere
    Posts
    560
    Now, maybe I'm a little off, but everyone here keeps saying the trans holds 3.8 Litres. Isn't it 3.8 quarts? Not to be a smarta$$, but there's a big difference....
    3.8 Litres = 4.02 Quarts (slightly higher then 3.8 Quarts)
    3.5 Litres = 3.69 Quarts (slightly less then 3.8 Quarts)
    3.25 Litres = 3.43 Quarts (Much less then 3.8 Quarts)

    Good place to purchase, offers quantity estimates

    Am I incorrect? Just want to make sure that the true amount doesn't get lost in translation...Under or Overfilling isn't a good practice....
    Last edited by Truckster27; 11-18-2008 at 07:09 AM.
    Movn' on up to an '06 WRX
    Vf-39 all the way!

    Love to build 'em, just to ship 'em out and start all over!

    I got friends in cyberspace, so I must be cool, right?
    Facebook / Myspace

  8. #7
    He simply abides. SD_GR's Avatar
    Join Date
    Jul 2002
    Location
    CA, US
    Posts
    22,601
    I Support ClubWRX
    Quote Originally Posted by Truckster27 View Post
    Am I incorrect?
    Not in your location, no. I think you're correct.

    I checked to see what a "quart" is -- turns out 3.5L is 3.1 Imperial QT or 3.8 US QT... The clearest measure is 3.5L but old habits die hard I suppose.

    On the bright side, the dipstick will warn of under filling, over filling isn't a problem with the splash-type vented system as far as I can tell, and the rear differential takes care of itself in that the level is dictated by over filling anyway. You're correct in the observations as far as I can tell though, thanks.
    WRX Info Links, Courtesy TheJ
    The world breaks everyone and afterward many are strong in the broken places. Ernest Hemingway
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

  9. #8
    Registered User Truckster27's Avatar
    Join Date
    Mar 2006
    Location
    Everywhere
    Posts
    560
    Cool deal. I've always run that way (capacity wise) on all my Subarus. I just didn't want to accidentally convey the wrong information. I've learned that while Forums are a REAL good source, some people end up taking the wrong information as gospel, not knowing any better. It was more for clarification to the poster who was asking the ??, as you seem more then knowledgable! The only real difference (maintenance-wise) between the sti and wrx tranny I believe is the fuild type (spash trans as opposed to a helper pump) and capacity...There are many other different compoents in the operation of the 2, but I believe those are the 2 for maintenance...
    Movn' on up to an '06 WRX
    Vf-39 all the way!

    Love to build 'em, just to ship 'em out and start all over!

    I got friends in cyberspace, so I must be cool, right?
    Facebook / Myspace

  10. #9
    Resident meany-rator 06wrx4me's Avatar
    Join Date
    Jun 2006
    Location
    Nor Cal
    Posts
    11,438
    I Support ClubWRX
    Quote Originally Posted by Truckster27 View Post
    Cool deal. I've always run that way (capacity wise) on all my Subarus. I just didn't want to accidentally convey the wrong information. I've learned that while Forums are a REAL good source, some people end up taking the wrong information as gospel, not knowing any better. It was more for clarification to the poster who was asking the ??, as you seem more then knowledgable! The only real difference (maintenance-wise) between the sti and wrx tranny I believe is the fuild type (spash trans as opposed to a helper pump) and capacity...There are many other different compoents in the operation of the 2, but I believe those are the 2 for maintenance...
    STI's rear R180 diff should use Subaru LSD oil.
    2014 Ford Fiesta ST

    06 WRX, HAWKEYE # 001 <T-boned and sold>

    COILOVER TABLE
    TURBO TABLE

  11. #10
    Registered User Acrdys's Avatar
    Join Date
    Jun 2007
    Location
    Lemore
    Posts
    1,117
    Quote Originally Posted by 06wrx4me View Post
    STI's rear R180 diff should use Subaru LSD oil.
    If you wanna go Motul..

    90PA LSD Fluid for the STI rear diff.

    90PA LSD Fluid Turn In Concepts

    Also the cheapest place I can find any Motul fluid...
    Hawk-Eye Alliance#8089
    MODS LIST

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •