01-07-2020, 06:00 PM
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#1
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Question about the 4wd system
Hey guys I have the AWD push button version of the 4Runner. I know with my system I could even drive on dry pavement and not mess anything up with the push of the button as long as I don’t lock my center diff.
My question is if you have the J shifter 4WD system on the 4Runner without the push button. If you move your shifter to 4hi could you also drive it in dry pavement? Was curious if 4hi unlocked is same as AWD.
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01-07-2020, 06:17 PM
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#2
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1999 4Runner Limited - 5VZ, 4wd, Factory E-Locker, Multi-Mode, 5-speed swap, Armored, Icons, 295s ( thread)
2001 Tacoma Xtracab - 3RZ, 4wd, 5-speed (Daily Driver)
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01-07-2020, 06:32 PM
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#3
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AWD has a differential in the Transfer case. 4WD does not.
AWD the front tires that take the longer path around a corner are allowed to spin faster than the drive tire(s).
4WD the front and rear axles are tied together. 1 front tire and 1 rear tire are forced to spin at the same speed. When you turn and the rear tires take a shorter path than the front tires it creates binding.
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Owned 82, 83, 87 pickup, 98, 99 SR5 4runner
Currently own a 98 SR5, 5spd, 4x4, e-locker, no sunroof. 2012 LTD with the normal options.
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01-07-2020, 06:34 PM
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#4
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Quote:
Originally Posted by Team_Jake
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You can drive up to 50mph in 4hi In a straight line any time. It's not recommended to do turns in 4hi on dry pavement may cause binding issues.
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01-07-2020, 09:04 PM
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#5
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Guess 4hi is the same as locking the center diff?
If it was snowing very light could you put your 4Runner in 4hi and not mess anything up?
Last edited by TheShowtime; 01-07-2020 at 09:23 PM.
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01-07-2020, 09:41 PM
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#6
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Quote:
Originally Posted by spartacus
You can drive up to 50mph in 4hi In a straight line any time. It's not recommended to do turns in 4hi on dry pavement may cause binding issues.
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There is no restriction of top speed in 4wd Hi.
You can only shift from 2wd to 4wd Hi up to 50 mph.
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01-07-2020, 09:51 PM
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#7
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Quote:
Originally Posted by TheShowtime
Guess 4hi is the same as locking the center diff?
If it was snowing very light could you put your 4Runner in 4hi and not mess anything up?
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They used to have a little card on your visor explaining that the roads need to be slippery or wet to be in 4Hi or 4Lo. As like the other users said. One front and One rear are locked together in J shifter transfer case.
So if its snowing and the roads are covered you can be in 4Hi. As the road would be wet and slippery so the 2 axles can slip and not bind.
Sent from my SM-J337V using Tapatalk
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01-07-2020, 11:33 PM
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#8
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I grew up driving 4x4’s. I run 4hi on patchy ice and snow. Its fine, you just don’t want to turn very sharp.
If you turn too sharp you can feel the binding and tire scrub. Just straighten it out to relieve the pressure and then push it forward into 2hi, and then make your turn.
Doesn’t take long and you get used to shifting back and forth between 2 and 4 as conditions dictate. Like driving a manual, soon you shift without a thought about it.
Get on a dry gravel road and put it in 4 and try driving and turning. You’ll get a feel for the binding and tire scrub.
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Owned 82, 83, 87 pickup, 98, 99 SR5 4runner
Currently own a 98 SR5, 5spd, 4x4, e-locker, no sunroof. 2012 LTD with the normal options.
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01-08-2020, 12:09 PM
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#10
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Quote:
Originally Posted by alumarine
There is no restriction of top speed in 4wd Hi.
You can only shift from 2wd to 4wd Hi up to 50 mph.
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If there is no awd button on the shifter then the max speed on a J shift in 4hi is 55mph.
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01-08-2020, 01:11 PM
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#11
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My Owners manuals (98 and 99) don't really list a Maximum speed for 4H. They do in reference to transmission gear selection and engine RPM, but the max speed is the same for both 2H and 4H, and 4th gear is 102MPH LOL.
They do both list maximum shifting speeds for H2 to H4 and back.
Lever type = 25mph
With A.D.D. = 50mph
Push button = 62mph
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Owned 82, 83, 87 pickup, 98, 99 SR5 4runner
Currently own a 98 SR5, 5spd, 4x4, e-locker, no sunroof. 2012 LTD with the normal options.
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01-08-2020, 01:26 PM
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#12
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Problem with me is I can’t switch from 2wd to 4wd quick. Takes forever to lock and unlock my center diff. But thanks for everyone’s help. I now understand the 3rd gens 4wd system.
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01-08-2020, 03:05 PM
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#13
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You should be fine in "AWD" mode for almost all snow-type situations. Set it and forget it for bad weather...
The standard "j" shift transfer case only has the limitation of 55mph for shifting INTO 4WD, you can go any speed you want once in 4WD and can shift out of 4WD any time you want.
Oh, and you want to exercise the system at least monthly (5 miles). If the roads are dry, shift while driving straight and avoid turns. For the electrically shifted transfer cases, it is important to operate it just to keep it working - and the more you operated it, the faster it works.
-Charlie
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01-08-2020, 04:19 PM
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#14
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Quote:
Originally Posted by phattyduck
You should be fine in "AWD" mode for almost all snow-type situations. Set it and forget it for bad weather...
The standard "j" shift transfer case only has the limitation of 55mph for shifting INTO 4WD, you can go any speed you want once in 4WD and can shift out of 4WD any time you want.
Oh, and you want to exercise the system at least monthly (5 miles). If the roads are dry, shift while driving straight and avoid turns. For the electrically shifted transfer cases, it is important to operate it just to keep it working - and the more you operated it, the faster it works.
-Charlie
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Too add to Charlies Post. I would practice and exercise the transfer cases on dirt or gravel roads. That way if its a J Shift Transfer case you will not bind up if turns are involved etc. Also alot less traffic on these roads as well which helps if you need to look at the floor. ;-)
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7 3rd gens listed in the build thread (2 are parts mobiles)
Build Thread: https://www.toyota-4runner.org/3rd-g...os-builds.html
Brillo's Bucket Fluid Ex changer: https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information: https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html
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01-08-2020, 04:26 PM
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#15
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Quote:
Originally Posted by brillo_76
Too add to Charlies Post. I would practice and exercise the transfer cases on dirt or gravel roads. That way if its a J Shift Transfer case you will not bind up if turns are involved etc. Also alot less traffic on these roads as well which helps if you need to look at the floor. ;-)
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I'd love to, but living in Los Angeles and a busy family life means no rain/snow and no gravel/dirt for months on end.
-Charlie
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'99 4Runner SR5 Auto - 4WD swapped
'89 Camry Alltrac LE 3S-GTE 5spd
'17 Chevy Volt Premier
'16 Honda Odyssey Elite
Previous: '88 Camry Alltrac LE 3S-GE BEAMS, 90 Camry 3S-GTE, 90 Camry DX, '03 WRX wagon, '08 Outback XT
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