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Unread 12-04-2005, 05:03 PM   #1
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Question Wheeling the auto with ATRAC

I have a read a few times that it very slow crawling situations with an auto it is best to keep your left foot on the brake while slowly accelarating wih the right on the gas. Obviously don't stomp on the brake or gas. Basically add some resisteance to the drivetrain to avoid the "sloppiness' of the torque converter. So you add hold lightly on the brake and then use a bit more power on the accelarotor to make the vehicle move forward.

This allows for the torque converter to tighten up and makes the vehicle crawl nice and really slow when needed (Obviously this is when extreme control over crawling speed is desired) So instead of the torque converter pushing forward or standing still it will move nice and slow. This helps when clearing some big rocks as you wont speed of on the other sidee of it.

So here is my question. I tried it at Hollister yesterday and it works really nice. I could swear that the ATRAC still kicked in with my left foot lightly on the brake. However I would like some other folks to try it out when they go wheeling and report back their experiences. This might be good to know for all.

See if it makes it beter or worse for you. Also if ATRAC still works the same for you, or bettter,or worse, or if ATRAC stops working for you when touching the brake.

Just train your left foot to be gentle on the brake. Luckily I learned left foot braking many moons ago while racing. At first you have a tendency to overpower the brake with your left foot.
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Unread 05-22-2006, 02:48 PM   #2
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Quote:
Originally Posted by bulldog
I have a read a few times that it very slow crawling situations with an auto it is best to keep your left foot on the brake while slowly accelarating wih the right on the gas. Obviously don't stomp on the brake or gas. Basically add some resisteance to the drivetrain to avoid the "sloppiness' of the torque converter. So you add hold lightly on the brake and then use a bit more power on the accelarotor to make the vehicle move forward.

This allows for the torque converter to tighten up and makes the vehicle crawl nice and really slow when needed (Obviously this is when extreme control over crawling speed is desired) So instead of the torque converter pushing forward or standing still it will move nice and slow. This helps when clearing some big rocks as you wont speed of on the other sidee of it.

So here is my question. I tried it at Hollister yesterday and it works really nice. I could swear that the ATRAC still kicked in with my left foot lightly on the brake. However I would like some other folks to try it out when they go wheeling and report back their experiences. This might be good to know for all.

See if it makes it beter or worse for you. Also if ATRAC still works the same for you, or bettter,or worse, or if ATRAC stops working for you when touching the brake.

Just train your left foot to be gentle on the brake. Luckily I learned left foot braking many moons ago while racing. At first you have a tendency to overpower the brake with your left foot.
; this last weekend at Rowher Flats both times my wheels started to spin where I lost all momentum, I used this trick. Just lightly held the brake with the left foot, and both times I was able to re-gain momentum and climb the grade....

On my radio, I heard one of the watcher's say..."Does that have lockers...did he just put on the locker?"

And yes, while doing this I could feel ATRAC at work........these 4runners are very cool.....
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Unread 05-22-2006, 03:25 PM   #3
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Kewl, thx for confirming it. I haven't needed it to that level again for some time now. At Frank Raines I just build a nice bt of momentum and climbed the hills no prob. No need at that time to have slow crawling.
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Unread 05-22-2006, 08:22 PM   #4
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I used this technique yesterday out on the Kodachrome Trail. There's a bypass that goes up some red rock slick rock, that's really not meant for trucks. It was working really nice, but, I ran out of room. Rich and his 1st gen Tacoma made it up, just barely. But I think that me being at least 7" wider, taking the same line, and almost laying my drivers door on the rock. Here's another great reason to have sliders, as I was resting on them with about .5" till sheet metal met rock. Hey, I gave it a shot. I'll post up a picture later when I get home from work.
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Unread 05-22-2006, 08:24 PM   #5
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One thing is that it's not entirely easy getting your left foot to work properly, when you have always driven with just your right.
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Unread 02-08-2007, 01:44 PM   #6
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Here's some no locker ATRAC action:Video
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Unread 02-08-2007, 01:54 PM   #7
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Quote:
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Here's some no locker ATRAC action:Video
Linky now worky
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Unread 02-08-2007, 01:57 PM   #8
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Quote:
Originally Posted by Joel View Post
Here's some no locker ATRAC action:Video
Link doesn't work
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Unread 02-08-2007, 01:58 PM   #9
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....fixed....
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Unread 02-08-2007, 03:25 PM   #10
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Good video Joel, I remember the firsttime I saw it, as it really shows ATRAC kicking in. What was also amazing at that obstacle was how much easier the rigs with ATRAC went through compared to the ones with just a rear locker.

Maybe you can slow it down 2x to show the wheels in the air getting braked by the ATRAC system.
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Unread 02-08-2007, 03:36 PM   #11
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Slowed down 2x
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Unread 02-08-2007, 03:59 PM   #12
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It took quite a few tries for this work computer to actually find and play, but it worked, and looked cool in slow motion!
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Unread 02-08-2007, 04:28 PM   #13
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Quote:
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Looks really good in slomo.
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Unread 02-08-2007, 04:42 PM   #14
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I showed it to our new car manager, he was amazed. I don't think that he's actually ever seen A-Trac work.
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Unread 02-08-2007, 08:11 PM   #15
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Quote:
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Very cool in slooow mooo
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Unread 03-22-2007, 11:23 AM   #16
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Quote:
Originally Posted by bulldog View Post
I have a read a few times that it very slow crawling situations with an auto it is best to keep your left foot on the brake while slowly accelarating wih the right on the gas. Obviously don't stomp on the brake or gas. Basically add some resisteance to the drivetrain to avoid the "sloppiness' of the torque converter. So you add hold lightly on the brake and then use a bit more power on the accelarotor to make the vehicle move forward.

This allows for the torque converter to tighten up and makes the vehicle crawl nice and really slow when needed (Obviously this is when extreme control over crawling speed is desired) So instead of the torque converter pushing forward or standing still it will move nice and slow. This helps when clearing some big rocks as you wont speed of on the other sidee of it.

So here is my question. I tried it at Hollister yesterday and it works really nice. I could swear that the ATRAC still kicked in with my left foot lightly on the brake. However I would like some other folks to try it out when they go wheeling and report back their experiences. This might be good to know for all.

See if it makes it beter or worse for you. Also if ATRAC still works the same for you, or bettter,or worse, or if ATRAC stops working for you when touching the brake.

Just train your left foot to be gentle on the brake. Luckily I learned left foot braking many moons ago while racing. At first you have a tendency to overpower the brake with your left foot.

I got taught that in the military. Its called brake throttle modulation. Some of us country folk call it the "brake trick".

I used to know how to explain it, but if you do a google, I am sure someone can explain it better than me. Its used a LOT on hummers by the US Army.
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Unread 03-23-2007, 05:27 AM   #17
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Quote:
Originally Posted by Joel View Post
Here's some no locker ATRAC action:Video
very cool joel...btw, where did you get that grill insert? do you have any close up pics of it? I like it!
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Unread 04-02-2007, 06:10 PM   #18
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Just wondering if anyone has tried clicking the emergency brake in just slightly. Say one click or so. SInce it locks in place you wouldn't have to worry about keeping your left foot on the brake. Hope it's not too dumb of a question!
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Unread 04-02-2007, 06:24 PM   #19
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Quote:
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Just wondering if anyone has tried clicking the emergency brake in just slightly. Say one click or so. SInce it locks in place you wouldn't have to worry about keeping your left foot on the brake. Hope it's not too dumb of a question!
Interesting idea, although I think the eBrake is pretty useless, especially in 4Lo.
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Unread 04-02-2007, 06:36 PM   #20
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And it only works on the rear wheels.
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