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"Drive Systems" maze: what is ON in 2WD mode?

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Old 05-12-2012, 03:23 PM   #21
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Quote:
Originally Posted by David K View Post
YES... first let me answer the second question:

What the chart says is the driver cannot choose the 'TRAC OFF MODE' in H4 and L4...

This is just a poor use of terms by Toyota. They call AUTO LSD the 'TRAC OFF MODE'... which only works in 2WD.

So, in 4WD you cannot turn on 2WD's AUTO LSD (TRAC OFF MODE).

In H4 your normal mode is TRAC without engine regulation, and you can turn off the TRAC which is what Toyota calls the 'VSC OFF MODE' (TRAC and VSC both off).

In L4 you have no traction controls (except the Off Road TRD's A-TRAC).

================================================== ======

In my sig. is a link to: http://www.tacomaworld.com/forum/2nd...ar-locker.html


In there is this:

UP TO NINE DRIVE MODES

1) Normal street driving: H2 TRAC ON and VSC is on.

2) Slippery conditions, to get moving from a stuck: H2 AUTO LSD ON (VSC is off under 30 mph). Press VSC button once while moving or stopped.

3) Spinning tires prefered: H2 VSC OFF/ TRAC OFF. Press and hold down VSC button 3+ seconds, while stopped.

4) Loose dirt, sand, snow: H4 TRAC ON and VSC is on.

5) Spinning tires prefered, off pavement: H4 VSC OFF/ TRAC OFF. Press and hold down VSC button 3+ seconds, while stopped.

6) Spinning tires prefered with low gearing torque: L4 (with A-TRAC off)

7) Steep grades, large rocks, deep mud, severe traction conditions: L4 with A-TRAC ON. Press A-TRAC button once.

8) Spinning tires in front only: L4 with REAR DIFFERENTIAL LOCKED.

9) L4 REAR LOCKED and A-TRAC ON. A-TRAC comes on automatically when speed drops to under 3 mph to provide front traction to get you going, again.

ALL Tacomas have 1-3. ALL 4WD Tacomas have 1-6. ONLY 4WD OFF ROAD TRD Tacomas have 1-9.
I took your nine mode list and edited to make it easier for my wife to understand, typed it up on a small card and put it on the driver side visor in case she gets stuck. {She doesn't drive the Taco often enough to remember all this}
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Old 05-12-2012, 05:08 PM   #22
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It is really for the few of us who have a 'need' to know how they work or what is happening at each choice.

The simple fact is, is your Tacoma is a 4WD, then just going into H4 (high range 4WD) will be most often the only thing you need to do!

If your Tacoma is a 2WD, then pushing the VSC switch once to activate AUTO LSD is about your best choice for getting unstuck in a low traction situation.

If your Tacoma is a 4WD OFF ROAD, then you have the ultimate in traction assist systems for severe conditions, in L4 (low range 4WD) with both the Rear Diff. Locker and the A-TRAC device.
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Old 05-13-2012, 04:48 PM   #23
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Why is it "hit or miss" when trying to get the rear diff to engage?
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Old 05-13-2012, 04:49 PM   #24
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Quote:
Originally Posted by Thighmaster View Post
Why is it "hit or miss" when trying to get the rear diff to engage?
The splines have to line up.
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Old 05-13-2012, 04:58 PM   #25
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^ any tricks to help line up the splines?
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Old 05-13-2012, 05:01 PM   #26
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Quote:
Originally Posted by Thighmaster View Post
Why is it "hit or miss" when trying to get the rear diff to engage?
Unlike A-TRAC, the rear locker is a mechanical process (engaged by an electric motor)... It may take more than one attempt.
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Old 05-13-2012, 05:02 PM   #27
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Quote:
Originally Posted by Thighmaster View Post
^ any tricks to help line up the splines?
Turn you steering wheel one direction.
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Old 05-13-2012, 05:30 PM   #28
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Quote:
Originally Posted by Thighmaster View Post
^ any tricks to help line up the splines?
Push the button while stopped then move forward while turning side to side. Remember that you have to be in low range for the locker to work if you are 4wd.
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Old 05-14-2012, 12:52 AM   #29
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Quote:
Originally Posted by David K View Post
Turn you steering wheel one direction.
Perfect.
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Old 06-24-2012, 11:52 PM   #30
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Just shared this info with a new V6 auto DC owner who had no idea of the options. Also, this makes three new owners I've met who assumed that 4L had all the bells and whistles engaged at the get go rather than open diffs.
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Old 06-25-2012, 10:15 AM   #31
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Quote:
Originally Posted by Thighmaster View Post
Just shared this info with a new V6 auto DC owner who had no idea of the options. Also, this makes three new owners I've met who assumed that 4L had all the bells and whistles engaged at the get go rather than open diffs.
Yes indeed... Only the Off Road 4WD has traction control in low range (A-TRAC), all other 4WD Tacomas will do better in most traction situations staying in high range 4WD, where they all have TRAC working all 4 tires to limit slip/ spin.

They may do the 4-low-trac mod and trick the truck into making TRAC work in low range... Rave reviews by those who have!
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Old 07-17-2012, 09:59 PM   #32
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Mod? I thought in 4lo you just pushed ATRAC on.
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Old 07-17-2012, 10:38 PM   #33
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Quote:
Originally Posted by Thighmaster View Post
Mod? I thought in 4lo you just pushed ATRAC on.
That mod is really for non ATRAC equipped models.
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Old 07-18-2012, 08:29 AM   #34
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Didnt someone figure out there there is actually 10 drive modes on the 2012s? The one I think is missing in the list 4H and trac off (short quick push on the button). IIRC my 12 will do this.
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Old 07-18-2012, 08:32 AM   #35
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Quote:
Originally Posted by 2002 SilverBullet View Post
Didnt someone figure out there there is actually 10 drive modes on the 2012s? The one I think is missing in the list 4H and trac off (short quick push on the button). IIRC my 12 will do this.
Yes.

http://www.tacomaworld.com/forum/tec...ml#post5356722
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Old 07-19-2012, 10:27 PM   #36
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One of the nine on David K's list "4WD-Hi: 'VSC OFF MODE' (TRAC is off for 'open differentials')."
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Old 10-27-2012, 08:36 PM   #37
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Had our first real snow dump up here, 10". It's true what they say, 4WD does NOT increase traction. Very fun learning the traction control in the white stuff.
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