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

LSD vs Locker...?

Discussion in 'Technical Chat' started by hail-bop Command, Apr 3, 2008.

  1. Apr 3, 2008 at 1:39 PM
    #1
    hail-bop Command

    hail-bop Command [OP] Well-Known Member

    Joined:
    Feb 11, 2008
    Member:
    #4692
    Messages:
    205
    Vehicle:
    I Don't Crawl I Haul A$$!
    Whats the difference, the pros and cons of both. For the most part does a does a limited slip diff do the same stuff a locker does?

    Examples please!

    Sorry if this thread has been done allready.
     
  2. Apr 3, 2008 at 2:07 PM
    #2
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Thor

    Joined:
    Apr 27, 2007
    Member:
    #1432
    Messages:
    26,978
    Gender:
    Male
    First Name:
    Jamie
    Moncks Corner, SC
    Vehicle:
    09 Timberland Mica DC 4WD Sport
    wat?
    check the 2nd gen section....a few topics of the sort still running up there
     
  3. Apr 3, 2008 at 4:22 PM
    #3
    Janster

    Janster Old & Forgetful

    Joined:
    Mar 25, 2007
    Member:
    #1138
    Messages:
    13,598
    Gender:
    Female
    First Name:
    Jandy
    Lancaster, PA
    Vehicle:
    2007 4.0L 4x4 TRD Sport Access Cab A
    Advantage Torza top (tri-fold), Husky floor mats, RuffTuff seat covers, C2C hood struts, Homelink mirror, USA Spec PA15-Toy (120gig Classic & 8gig nano), Garmin Nuvi 660, Protecta Bed mat, Pop-n-lock, TSB Springs, Scangauge II, Heated drivers seat, Fumoto drain valve, Aries pushbar, PIAA 540 fog lights, Hood scoop grahics, Flowmaster 50 series dual catback exhaust, RainX Latitude windshield wipers, Husky rear floor liner (ontop of folded down seats). Console Vault.
    Try searching this forum or using Google. You'll find all sorts of information about them both.

    In a nutshell....
    LSD is a Limited Slip Differential that comes in the TRD Sport models and some non-TRD models. It offers traction to both wheels when both wheels are spinning at the same rate. It engages / disengages on its own. The driver doesn't have to do anything.

    TRD Locker can only be engaged in 4lo and the driver must engage it. It's often called an e-locker and can only be found in the TRD Offroad models. This is a fulltime locker that engages both wheels via gearing and does not come disengaged unless you (the driver) disengages it. Both wheels are locked together regardless of the terrain or wheel speed. One wheel can be off the ground and the other wheel will still have 'drive'.

    Because the LSD is always in use and doesn't require any input from the driver, it's the only factory optioned traction device that's designed for street usage (on pavement).

    The e-locker can only be engaged in 4WD - so you can't use it on pavement (never use 4WD on pavement).

    If you're going offroad, the e-locker is the best choice to have.
    If you're looking for traction device for daily driving on the street and some traction for minor offroading - the LSD is the best choice.
     
  4. Apr 3, 2008 at 4:26 PM
    #4
    lsocoee

    lsocoee My hair is all natural Thor

    Joined:
    Feb 9, 2007
    Member:
    #872
    Messages:
    10,101
    First Name:
    Hotdog
    Vehicle:
    2007 PreRunner SR5 Double Cab
    Wet Okole Underwear
    Yes, but why would anyone choose the locker over the LSD?

    That's because you will not get equal amounts of torque to both wheels. If one of your rear drive wheels lifts off the ground, while you are going uphill, the drive wheel on the ground might not have enough torque to push you up. Correct? This is based on a bunch of shit that I've read and could be completely wrong.
     
  5. Apr 3, 2008 at 4:30 PM
    #5
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Thor

    Joined:
    Apr 27, 2007
    Member:
    #1432
    Messages:
    26,978
    Gender:
    Male
    First Name:
    Jamie
    Moncks Corner, SC
    Vehicle:
    09 Timberland Mica DC 4WD Sport
    wat?
    u cant forget the prerunners...no 4lo to have it in to engage the e-locker
     
  6. Apr 3, 2008 at 4:32 PM
    #6
    hail-bop Command

    hail-bop Command [OP] Well-Known Member

    Joined:
    Feb 11, 2008
    Member:
    #4692
    Messages:
    205
    Vehicle:
    I Don't Crawl I Haul A$$!
    Good point... This is pretty much the same impression I was under. I was told the LSD works pretty much like a locker but better. Only problem is when the clutch wears out and 1 time out of 10 when one wheel is off the ground the other one on the ground will not engage correctly.
     
  7. Apr 3, 2008 at 4:34 PM
    #7
    lsocoee

    lsocoee My hair is all natural Thor

    Joined:
    Feb 9, 2007
    Member:
    #872
    Messages:
    10,101
    First Name:
    Hotdog
    Vehicle:
    2007 PreRunner SR5 Double Cab
    Wet Okole Underwear
    one wheel off the ground is the extreme. It could be even one wheel stuck in mud, going uphill.

    Our LSD is clutch based, but there are other LSDs that are geared. Detroit TrueTrac comes to mind.
     
  8. Apr 3, 2008 at 4:39 PM
    #8
    concrete jedi

    concrete jedi Well-Known Member

    Joined:
    Oct 20, 2007
    Member:
    #3142
    Messages:
    2,747
    Rochester N.Y
    Vehicle:
    06 Tacoma 4 door indigo blue
    Broken and scratched tailgate, cracked rear tail light lens, coffee stain in driver seat.
    I myself am a locker rear end kind of guy ( although I don't have one, long story ) because when off road there is nothing that can compete with one in the traction dept. Meanwhile on the road it is an open rear end-- meaning only one wheel has torque, LSD or limited slip diff. has one primary wheel that has torque, and if traction becomes an issue a certain percentage of torque goes to the other wheel, I'm guessing a 70/30 ratio ? both are effective.
     
  9. Apr 3, 2008 at 4:42 PM
    #9
    hail-bop Command

    hail-bop Command [OP] Well-Known Member

    Joined:
    Feb 11, 2008
    Member:
    #4692
    Messages:
    205
    Vehicle:
    I Don't Crawl I Haul A$$!
    So the true track is like the best of both?
     
  10. Apr 3, 2008 at 4:47 PM
    #10
    lsocoee

    lsocoee My hair is all natural Thor

    Joined:
    Feb 9, 2007
    Member:
    #872
    Messages:
    10,101
    First Name:
    Hotdog
    Vehicle:
    2007 PreRunner SR5 Double Cab
    Wet Okole Underwear
    no. It still is an LSD. So there will not be equal torque distribution, but you don't have to worry about the clutch wearing out.
     
  11. Apr 3, 2008 at 4:53 PM
    #11
    hail-bop Command

    hail-bop Command [OP] Well-Known Member

    Joined:
    Feb 11, 2008
    Member:
    #4692
    Messages:
    205
    Vehicle:
    I Don't Crawl I Haul A$$!
    Ahhh... I'm gunna have to googel it and read about it.
     
  12. Apr 3, 2008 at 4:57 PM
    #12
    eordonez

    eordonez Living vicariously through mjp2

    Joined:
    Mar 17, 2008
    Member:
    #5340
    Messages:
    8,408
    Gender:
    Male
    First Name:
    Ed
    Chihuahua, Mexico
    Vehicle:
    TRD Sport Dcab 4x2 Black Sand Pearl
    OEM All Weather Mats, wheel locks, Toyota Silver Tube steps.....
    hail bop´s avatar freaks me out lol funny
     
  13. Apr 3, 2008 at 5:07 PM
    #13
    hail-bop Command

    hail-bop Command [OP] Well-Known Member

    Joined:
    Feb 11, 2008
    Member:
    #4692
    Messages:
    205
    Vehicle:
    I Don't Crawl I Haul A$$!
    Ah hahahahah!
     
  14. Apr 3, 2008 at 5:08 PM
    #14
    jonny_jard

    jonny_jard Well-Known Member

    Joined:
    Sep 30, 2007
    Member:
    #2865
    Messages:
    110
    Alberta
    Vehicle:
    06 Taco
    3" suspension lift, bull bar, IPF 100w flood light system, side bars, custom fit leather seat covers, URD CAI, URD MAF calibrator,
    Funny, i got stuck last night in about 8-12 inches of snow. I was kicking my self the whole time for cheeping out and not getting the TRD with the locking diff. Get the locking diff unless your just driving around town/hwy.
     
  15. Apr 3, 2008 at 5:19 PM
    #15
    hail-bop Command

    hail-bop Command [OP] Well-Known Member

    Joined:
    Feb 11, 2008
    Member:
    #4692
    Messages:
    205
    Vehicle:
    I Don't Crawl I Haul A$$!
    So u have the LSD on yours?
     
  16. Apr 3, 2008 at 5:20 PM
    #16
    hail-bop Command

    hail-bop Command [OP] Well-Known Member

    Joined:
    Feb 11, 2008
    Member:
    #4692
    Messages:
    205
    Vehicle:
    I Don't Crawl I Haul A$$!
    Wait a minute... Are u saying i'm not good looking?
     
  17. Apr 3, 2008 at 8:08 PM
    #17
    Janster

    Janster Old & Forgetful

    Joined:
    Mar 25, 2007
    Member:
    #1138
    Messages:
    13,598
    Gender:
    Female
    First Name:
    Jandy
    Lancaster, PA
    Vehicle:
    2007 4.0L 4x4 TRD Sport Access Cab A
    Advantage Torza top (tri-fold), Husky floor mats, RuffTuff seat covers, C2C hood struts, Homelink mirror, USA Spec PA15-Toy (120gig Classic & 8gig nano), Garmin Nuvi 660, Protecta Bed mat, Pop-n-lock, TSB Springs, Scangauge II, Heated drivers seat, Fumoto drain valve, Aries pushbar, PIAA 540 fog lights, Hood scoop grahics, Flowmaster 50 series dual catback exhaust, RainX Latitude windshield wipers, Husky rear floor liner (ontop of folded down seats). Console Vault.
    It all depends on what you want the locker/lsd for.

    In offroad situations....
    Doesn't matter if you're going uphill or not... If your e-locker is engaged, both wheels are driving regardless. If one wheel is off the ground... the other wheel is still 'driving' at the same rate & torque. The only limitations to that - is the terrain and/or the strength of the axle/shaft/gears.

    The locker will always work and the wheels will always be driven.. but the amount of weight transfer, loose gravel, and poor tires will make that wheel SPIN (lose traction). If you have plenty of traction at the wheels - and the truck isn't moving (for some reason), then the next thing will be breakage (weakest link could be anything, axle shafts, gear teeth, u-joints, etc).
     
  18. Apr 4, 2008 at 7:04 AM
    #18
    nd

    nd Radical Town. It's a hell of a place!

    Joined:
    Mar 12, 2007
    Member:
    #1047
    Messages:
    12,738
    Gender:
    Male
    First Name:
    Nate
    Greenville, SC
    Vehicle:
    07 TRD Off-Road 4x4 debadged
    De badged, 5100's, Black Toyota Baja wheels
    lsd will never be as good as a locker for offroad situations. But is GREAT for on road driving. the locker should not be used on road (unless its snowy or icy). unfortunately there is no such thing as "the best of both worlds". Unless you take one of Jansters suggestions from another thread buy the lsd version then put an aftermarket locker on the front axel. then you will have both and a very capable vehicle. Janster, did you suggest this bacause you have actually done it before?

    so basically, if you want supreme off-road performance get teh locker. if your concerns is supreme on road performance get the lsd. what do you want to use the truck for primarily?
     
  19. Apr 4, 2008 at 7:11 AM
    #19
    007Tacoma

    007Tacoma I dub thee malicious!

    Joined:
    Jan 4, 2007
    Member:
    #643
    Messages:
    6,705
    Gender:
    Male
    First Name:
    Mark
    San Antonio, TX
    Vehicle:
    2003 4Runner SE 4WD
    Even for on-road, I would prefer the locker. I like being in control of what is going on, and you could use the locker only when you need it. That way you have true positive lock on the rear end.

    I will probably switch my LSD rear end for an E-Locker when the clutch finally wears out on my LSD.
     
  20. Apr 4, 2008 at 7:12 AM
    #20
    lsocoee

    lsocoee My hair is all natural Thor

    Joined:
    Feb 9, 2007
    Member:
    #872
    Messages:
    10,101
    First Name:
    Hotdog
    Vehicle:
    2007 PreRunner SR5 Double Cab
    Wet Okole Underwear
    Why don't you put it a locker in your front...oh, wait:p
     
To Top