1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Front Diff rotates in 2wd?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Brian422, Jul 17, 2020.

  1. Jul 17, 2020 at 12:26 PM
    #1
    Brian422

    Brian422 [OP] I fell into the pit that is TW

    Joined:
    Jun 8, 2011
    Member:
    #57958
    Messages:
    14,631
    Gender:
    Male
    First Name:
    Brian
    Birmingham, AL
    Vehicle:
    2012 DBCSB F/R Locked, 35's ,Long travel, 23 Tundra 4x4 limited
    Not Stock
    So quick question. I have been getting mixed info on this so i wanted to see what was the case from TW. Does the front driveshaft rotate in 2wd when driving around. In this video it shows the front driveshaft does not rotate and also when i am rotating mine (unistalled from truck) by cv the flange doesnt roate either. So im thinking it is just the spider gears that rotate in 2wd?

    https://www.youtube.com/watch?v=fHk8hVXzVeI&feature=emb_title
     
    PandaYota and cubie like this.
  2. Jul 17, 2020 at 12:33 PM
    #2
    TnShooter

    TnShooter The TacomaWorld Stray

    Joined:
    Sep 2, 2010
    Member:
    #42625
    Messages:
    18,122
    Gender:
    Male
    First Name:
    Deogee
    Vehicle:
    07' TRD Off-Road, Auto
    STOCK
    Yes, the CV’s always rotate.
    No, the front driveshaft does not rotate in 2WD.
    In 2WD, the front shaft is disconnected from the transfer case and the front diff.
    Makes greasing the zerks much easier.

    All is normal.
     
  3. Jul 17, 2020 at 12:38 PM
    #3
    Brian422

    Brian422 [OP] I fell into the pit that is TW

    Joined:
    Jun 8, 2011
    Member:
    #57958
    Messages:
    14,631
    Gender:
    Male
    First Name:
    Brian
    Birmingham, AL
    Vehicle:
    2012 DBCSB F/R Locked, 35's ,Long travel, 23 Tundra 4x4 limited
    Not Stock
    Thats what i was thinking. So when CV are rotation its rotating through the spider gears correct?
     
  4. Jul 17, 2020 at 12:44 PM
    #4
    Muddinfun

    Muddinfun Well-Known Member

    Joined:
    Apr 17, 2017
    Member:
    #216500
    Messages:
    7,491
    Yes, the spider gears are spinning like a ground bloom flower on the 4th of July. That’s the way it’s designed. Doesn’t hurt anything.
     
  5. Jul 17, 2020 at 12:48 PM
    #5
    Brian422

    Brian422 [OP] I fell into the pit that is TW

    Joined:
    Jun 8, 2011
    Member:
    #57958
    Messages:
    14,631
    Gender:
    Male
    First Name:
    Brian
    Birmingham, AL
    Vehicle:
    2012 DBCSB F/R Locked, 35's ,Long travel, 23 Tundra 4x4 limited
    Not Stock
    my thoughts exactly. so on a regear you would need to engage the front diff to get ring in pinon turning correct?
     
  6. Jul 17, 2020 at 12:49 PM
    #6
    TnShooter

    TnShooter The TacomaWorld Stray

    Joined:
    Sep 2, 2010
    Member:
    #42625
    Messages:
    18,122
    Gender:
    Male
    First Name:
    Deogee
    Vehicle:
    07' TRD Off-Road, Auto
    STOCK
    As muddin said, yes.
    That’s why it is a good idea to change the front diff fluid regularly.


    When you do, go ahead and pick up this drain plug.
    That way you don’t have any issues later, when the allen rusts and starts to strip.
    https://www.tacomaworld.com/threads/front-diff-drain-plug-alternate-oem-part.604989/
     
    D2. and Brian422[QUOTED][OP] like this.
  7. Jul 17, 2020 at 3:28 PM
    #7
    nd4spdbh

    nd4spdbh Well-Known Member

    Joined:
    Oct 7, 2013
    Member:
    #114055
    Messages:
    14,077
    Gender:
    Male
    SoCal
    Vehicle:
    13 DCSB TRD OR v6 Auto
    The front driveshaft LIKELY wont turn in 2wd, but there is nothing stopping it from turning. So at higher sustained speeds when everything is warmed up it does have the potential to spin somewhat due to the driver side CV turning while going through the main carrier.
     
    TnShooter and ovrlndkull like this.
  8. Jul 17, 2020 at 4:01 PM
    #8
    ovrlndkull

    ovrlndkull STUKASFK - HC4LIFE

    Joined:
    Jan 7, 2017
    Member:
    #206806
    Messages:
    37,789
    Gender:
    Male
    First Name:
    Skip
    Burlington, NC
    Vehicle:
    2005 DCLB Silver
    63s, XD Machete, Beat not Babied
    The front DS won't turn due to the ADD disconnect now you put an FJ PS stub shaft in when you are going in a straight line it can turn. But it wouldn't do anything because the tcase is then disconnected. It's like keeping your hubs locked on an older solid axle vehicle, the ADD took the place of locking hubs.
     
    Brian422[OP] and TnShooter like this.
  9. Jul 17, 2020 at 7:13 PM
    #9
    Brian422

    Brian422 [OP] I fell into the pit that is TW

    Joined:
    Jun 8, 2011
    Member:
    #57958
    Messages:
    14,631
    Gender:
    Male
    First Name:
    Brian
    Birmingham, AL
    Vehicle:
    2012 DBCSB F/R Locked, 35's ,Long travel, 23 Tundra 4x4 limited
    Not Stock
    Ahhh that makes so much sense! Thank you for the info!

    @whitedlite
     
  10. Jul 17, 2020 at 8:54 PM
    #10
    Oreo Cat

    Oreo Cat Worst Member

    Joined:
    Sep 19, 2016
    Member:
    #197755
    Messages:
    5,083
    So if I regear the rear but gotta wait a couple days to do the front will that be okay?
     
  11. Jul 17, 2020 at 9:04 PM
    #11
    TnShooter

    TnShooter The TacomaWorld Stray

    Joined:
    Sep 2, 2010
    Member:
    #42625
    Messages:
    18,122
    Gender:
    Male
    First Name:
    Deogee
    Vehicle:
    07' TRD Off-Road, Auto
    STOCK
    If you were to do this, don’t go into 4WD.
     
  12. Jul 17, 2020 at 9:06 PM
    #12
    Oreo Cat

    Oreo Cat Worst Member

    Joined:
    Sep 19, 2016
    Member:
    #197755
    Messages:
    5,083
    Yeah it’s mainly just not having the time to do it all at once. Want to the rear one weekend, be able to go to work, then do the front the next weekend
     
  13. Jul 17, 2020 at 9:10 PM
    #13
    TnShooter

    TnShooter The TacomaWorld Stray

    Joined:
    Sep 2, 2010
    Member:
    #42625
    Messages:
    18,122
    Gender:
    Male
    First Name:
    Deogee
    Vehicle:
    07' TRD Off-Road, Auto
    STOCK
    I don’t see a reason you couldn’t do it.
    Just make sure no one (kids?) can engage 4WD.

    I’ll tell on myself here.
    I once switch in to 4WD, while meaning to switch on the A/C.
    Don’t know why I did it (it was early in the A.M.), and I was going about 50mph. (Which would be bad in your case with different gears)
     
  14. Jul 17, 2020 at 9:39 PM
    #14
    Oreo Cat

    Oreo Cat Worst Member

    Joined:
    Sep 19, 2016
    Member:
    #197755
    Messages:
    5,083
    Haha I’ll be sure to put some tape over it or something
     
  15. Jul 17, 2020 at 9:43 PM
    #15
    Muddinfun

    Muddinfun Well-Known Member

    Joined:
    Apr 17, 2017
    Member:
    #216500
    Messages:
    7,491
    Pull the front driveshaft and it won’t matter if you put it in 4WD.
     
  16. Jul 17, 2020 at 9:47 PM
    #16
    TnShooter

    TnShooter The TacomaWorld Stray

    Joined:
    Sep 2, 2010
    Member:
    #42625
    Messages:
    18,122
    Gender:
    Male
    First Name:
    Deogee
    Vehicle:
    07' TRD Off-Road, Auto
    STOCK
    Good idea:thumbsup:

    Remember to mark it, and put it back in the same way.
    I honestly don’t know if the front is balanced?
    But it can hurt to put it back in the same way?

    Is the front balanced?
     
  17. Jul 17, 2020 at 10:07 PM
    #17
    Muddinfun

    Muddinfun Well-Known Member

    Joined:
    Apr 17, 2017
    Member:
    #216500
    Messages:
    7,491
    All driveshafts are balanced, and lots of people say to mark the flanges when you pull it. However, look at it this way. When the truck is built, it goes down the assembly line and someone bolts in the diffs. Then it goes farther and someone grabs a driveshaft out of a pile of driveshafts and slaps it in. There is no way that they balance the driveshafts with the yokes and then send the yokes to the axle assembly department for assembly and then keep track of which axle and transfer case goes with each driveshaft. I would venture a guess that the axles and transfer cases aren’t even assembled in the same building as the truck.
     
    07 sport 4x4 and TnShooter like this.
  18. Jul 18, 2020 at 12:40 AM
    #18
    07 sport 4x4

    07 sport 4x4 Well-Known Member

    Joined:
    Dec 24, 2010
    Member:
    #48165
    Messages:
    1,454
    Gender:
    Male
    First Name:
    Blake
    Southeast
    Vehicle:
    2017 Duramax
    I always try to put them back in the same orientation that they were in when I removed them, but you are correct and it should not matter.
     
  19. Jul 18, 2020 at 4:01 AM
    #19
    ovrlndkull

    ovrlndkull STUKASFK - HC4LIFE

    Joined:
    Jan 7, 2017
    Member:
    #206806
    Messages:
    37,789
    Gender:
    Male
    First Name:
    Skip
    Burlington, NC
    Vehicle:
    2005 DCLB Silver
    63s, XD Machete, Beat not Babied
    The driveshafts are balanced they are not matched or balanced to the rest of the driveline. Even if you have one made for you they aren't done that way there is no way to balance a driveshaft to the driveline. When people talk about a driveshaft being in phase they are talking about the u-joints and the slip yoke if it has it. The slip yoke is
    in a certain position and if you 180 it even though your u-joints will still be aligned correctly it still can be out of balance.
    it doesn't matter. This is one of those old wives tales from when vehicles were first created and they used a torque tube and correct orientation was more critical. Also think of a 2wd where the slip yoke is with the transmission and not the driveshaft how do you know you have the correct spline in the output shaft of the transmission when reinstalling.
     
    Muddinfun[QUOTED] likes this.
  20. Jan 30, 2023 at 3:57 PM
    #20
    rolot2

    rolot2 Well-Known Member

    Joined:
    Nov 9, 2019
    Member:
    #310297
    Messages:
    338
    Gender:
    Male
    First Name:
    Rolando
    Denver, CO
    Vehicle:
    2015 TRD OR DCSB
    Front: Extended Travel 2.5” King coilovers with/adjusters (Set at 3” lift) Rear: 2.0” King shocks with adjusters Icon RXT (Option 2) Pack Toyota TRD Cat-back exhaust AnytimeBackup Camera Anytime Front/Rear Camera RCI Sliders KB Voodoo Bed Rack Center Console Ram Mount
    My front tires are locking up in 2WD when I go over ice while turned sharply(like pulling in to a parking spot). No traction control light comes on the dash. Could this be my front diff binding?
     

Products Discussed in

To Top