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

Adding Down Hill Assist?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by ShaLor, Aug 15, 2010.

  1. Aug 15, 2010 at 3:52 PM
    #1
    ShaLor

    ShaLor [OP] Well-Known Member

    Joined:
    Jan 8, 2010
    Member:
    #29015
    Messages:
    406
    Gender:
    Male
    First Name:
    Shane
    Burbank, CA
    Vehicle:
    07 4x4 Doublecab TRD Off Road
    Custom mud flap removal from rock on trail :), Tailgate Hose Clamp Mod, Cobra 75 wx st CB install, 19 more D-Rings in the bed, Satoshi Grill, Fog Lamp on any time mod. Relentless Fab CB antenna hood mount, LED bed lights, Demello Hybrid Sliders, Undercover Tonneau Cover, Lighted 4x4 switch
    I have a 2007 TRD Off Road and I noticed while installing my CB that the button blanks where Down Hill Assist and traction control have wiring harness attached to the back of them.
    Am I just an overly optimistic person or is it possible that the only reason I don't have Down Hill Assist and Traction control on my truck is simply because I don't have the button to turn it on?
    It would be incredibly easy and cheap for Toyota to have all of the wiring in place for every option and just put in the button if the customer asks for that option. I am assuming that the actual down hill assist and traction control is just a computer program that gets turned on by the switch.

    Has anybody tried putting the switches in to see what happens?
    Is it possible to add down hill assist and traction control to a truck that didn't come with these options?
    That would be really cool.
     
  2. Aug 15, 2010 at 4:17 PM
    #2
    TRDsport253

    TRDsport253 Well-Known Member

    Joined:
    Nov 15, 2009
    Member:
    #25945
    Messages:
    1,667
    Gender:
    Male
    Fife, Wa
    Vehicle:
    05 PreRunner TRDsport
    TRD Cold air TRD Cat-back
    I'm just a curious as you. And yes it would be really cool if it works. Can anyone confirm this? I would go out and get me buttons if it does.
     
  3. Aug 15, 2010 at 4:20 PM
    #3
    Zombie Runner

    Zombie Runner Are these black helicopters for me?

    Joined:
    Mar 13, 2008
    Member:
    #5246
    Messages:
    15,036
    Gender:
    Male
    First Name:
    Kevin
    Wichita Falls, TX
    Vehicle:
    Tundra, double cab.
    LED interior lights, stubby antenna, Pioneer in dash screen, good driver mod.
    mine has wires behind the blanks but they are for factory fog lights and the rear locker... downhill assist didnt come around till 09 I think
     
  4. Aug 15, 2010 at 5:06 PM
    #4
    David K

    David K Well-Known Member

    Joined:
    Jun 27, 2009
    Member:
    #18969
    Messages:
    9,932
    Gender:
    Male
    San Marcos, Alta California
    Vehicle:
    2010 4WD Off Road DC
    Differential Breather Mod Light Bar: 2 Hella 4000 HID, 1 Cibie Halogen. Bilstein 5100s Ride Rite Air Bags
    Yup, the VSC, AUTO-LSD, TRAC and A-TRAC (and downhill assist) is for '09 and newer OFF ROAD 4WD Tacos.

    The downhill assist is fun, but the least valuable of the new traction features, IMO. It only works in L4, and allows you to totally keep your foot off the brake when you are creeping down a steep, off road grade. Allows the tires to roll and not lock up and skid, as they would if you used the brakes. Makes the same noises the A-TRAC makes.

    VSC (from Bosch) keeps you going straight at highway speeds should you begin to go into a skid.

    TRAC helps you get moving from a stop on wet or poor traction surfaces, or keep you moving through poor traction areas. Uses brakes on slipping tire to transfer torque to traction tire. In 2WD, it also regulates engine output to reduce spinning of non-traction tire. In H4, it is akin to having automatic limited slip, front and rear.

    AUTO LSD is TRAC in 2WD without the engine output regulation... to help you move out from a stuck in snow or mud.

    A-TRAC (Active Traction Control) is akin to automatic front and rear lockers while in L4. Unlike lockers, the A-TRAC does not interfere with steering ability!
     
  5. Aug 15, 2010 at 5:09 PM
    #5
    jhodge83

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

    Joined:
    Apr 27, 2007
    Member:
    #1432
    Messages:
    28,096
    Gender:
    Male
    First Name:
    Jamie
    Moncks Corner, SC
    Vehicle:
    09 Timberland Mica DC 4WD Sport
    wat?
    ^^ VSC was optional even back in the late 1st gens...not only 09+...TRAC/ATRAC/Auto LSD is true for that though
     
  6. Aug 15, 2010 at 5:28 PM
    #6
    David K

    David K Well-Known Member

    Joined:
    Jun 27, 2009
    Member:
    #18969
    Messages:
    9,932
    Gender:
    Male
    San Marcos, Alta California
    Vehicle:
    2010 4WD Off Road DC
    Differential Breather Mod Light Bar: 2 Hella 4000 HID, 1 Cibie Halogen. Bilstein 5100s Ride Rite Air Bags
    I had an '05 TRD OFF ROAD 4WD, and no VSC was included... VSC needs TRAC to work, so I doubt it unless it was some other system.
     
  7. Aug 15, 2010 at 5:32 PM
    #7
    jhodge83

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

    Joined:
    Apr 27, 2007
    Member:
    #1432
    Messages:
    28,096
    Gender:
    Male
    First Name:
    Jamie
    Moncks Corner, SC
    Vehicle:
    09 Timberland Mica DC 4WD Sport
    wat?
    ^^^
     
To Top