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Toyota 4WD systems explained

2400 messages,  Last post on Nov 22, 2009 at 10:30 AM

You are in the Toyota RAV4 Forum. Your Hosts are steve_ & tidester

What is this discussion about? Toyota Sequoia, Toyota Highlander, Toyota 4Runner, Toyota Land Cruiser, Toyota RAV4, Toyota Tacoma, Truck, SUV


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#2333 of 2400
Re: Lo 4 wheel drive [tuttie01] by wwest
Mar 18, 2009 (9:19 am)
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Replying to: tuttie01 (Mar 17, 2009 3:22 pm)

The center locking clutch, spline, dog clutch, often doesn't engage without slight/slow forward or reverse movement. The beep is probably a warning to you that the dog clutch is not yet engaged.
 
Same thing, often, when unlocking.
#2334 of 2400
Re: Lo 4 wheel drive [tuttie01] by green
Mar 28, 2009 (12:24 am)
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Replying to: tuttie01 (Mar 17, 2009 3:22 pm)

It'll beep if you're not in neutral. You also need to be stopped.
#2335 of 2400
Toyota V8 4Runner Limited 4 wheel drive system by bosma
Mar 30, 2009 (12:16 am)
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Can anyone please simply explain how to use the various 4 wheel drive options on the 05 V8 4Runner? Literally.
There is so much info on slip/no slip, locks but without traction control to some diferential.........? Wow.
You guys know what your talking about and for a simple gut like me it gets a bit confusing.
Now to my questions that I hope is clear enough to understand.
Aperrently my 4Runner is always in 4 wheel drive. O.K.
 
There is a silver knob to the right of the steering wheel and a black button to the left of the steering wheel.
My understanding is that there are two other levels of 4 wheel drive that can be applied to the already 4 wheel drive that the car is always in.
 
How do I get the car into the optional 4 wheel drives. Literally. Does the car need to be in neutral or park to perform these stunts? What knob or button do I engage first,second or third. It sounds like driving a submarine.
 
After I apply these tecniques so generously given by you, what simply happens to the car? Lol.
Ex: 1st- Turn the knob to 4W low then press the buton, open the sun roof half way and this will give you X.
All four wheels are now locked Or You now have low tourq for good pulling power etc....
i've read quite a bit on do's, dont's and bennefits in different 4 wheel drive settings but have no idea how to get the car to those settings.
Please Help Me!!
Thanking you all in advance.
Dave.
#2336 of 2400
Re: Toyota V8 4Runner Limited 4 wheel drive system [bosma] by green
Mar 31, 2009 (4:03 pm)
Reply

Replying to: bosma (Mar 30, 2009 12:16 am)

Since you have full time 4WD, you may never need the other settings. It is, however, a good idea to use low range a little a few times a year to keep it working properly.
 
The silver dial is for low range gearing. You need to be in neutral and stopped to engage. It's for extra pulling power or low speed control.
 
The black button with a picture of 4 wheels on it locks the center differential which does 2 things. 1. Locks the mechanical connection between the front and rear axles for better traction. 2. Defeats the electronic feature that limits throttle output (mostly or only an issue in high range). You can press this button stopped or in motion. If you're stopped, it sometimes requires a little wheel, throttle, or shifter motion to complete. The following rule is over-simplified but it works as a rule of thumb. Don't lock it unless the road surface is slippery: snow, dirt, slush etc. If you have to have it locked on pavement, avoid tight turns especially at low speed.
#2337 of 2400
95 4runner 4wd problem by blueduck
Apr 18, 2009 (7:21 am)
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I have a 95 limited 4runner and have been having trouble with my 4wd. We've had a lot of snow lately and its been hard to get around because its very sluggish. The steering seems a lot stiffer, and once I pass 20mph it feels like all 4 wheels are moving out of sync with each other which results in jerky movements side to side and front to back. It makes it very difficult to build up speed and stay in just one lane. I'm guess some sort of differential issue? I'm hoping I just need to grease something but chances are its probably more than that. Any ideas?
#2338 of 2400
Re: 95 4runner 4wd problem [blueduck] by wwest
Apr 20, 2009 (9:01 am)
Reply

Replying to: blueduck (Apr 18, 2009 7:21 am)

If you are not driving on a CONSISTENTLY/"continuously" slippery surface that might be an SOP effect of a 4WD with a locked center diff'l. And it is NOT advisable, actually UNSAFE, to be in 4WD, locked center differential, once you're up to a reasonable traveling speed.
#2339 of 2400
'01 center diff locking system problem? by fullcircle
May 06, 2009 (10:26 am)
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I recently purchased a '01 4Runner from my local dealer. Before purchasing the vehicle, I checked that the 4wd system was operating as per the owner's manual instruction. As it should have, when in 4wd, the ESC OFF and center diff indicator lights lit when the 4wd button on the side of the selector was pushed. A few months and about 2k miles later, I did a quick check of the 4wd system to make sure everything was getting lubricated when I noticed that when in the Low range, there was nothing happening once I pushed the 4wd button (I check this mode when fully stopped). Unlike before, the ESC OFF and center diff lock indicator lights do not come on when the button is pushed. Am I missing something here? I know it worked as the owner's manual said it should when I checked the system the first time. Now, nothing at all is happening when I push the 4wd button.
#2340 of 2400
Re: '01 center diff locking system problem? [fullcircle] by wwest
May 07, 2009 (9:04 am)
Reply

Replying to: fullcircle (May 06, 2009 10:26 am)

It is a rather rare event that the front driveline spline shaft "dog" clutch will engage with the vehicle not in motion, you typically have to be moving or move the vehicle slowly forward or reverse. ABS/TC/VSC/etc, will not be disabled until the spline clutch is actual in the engaged position.
 
Getting the 4WD clutch to engage in low, "granny grunt" range without the vehicle in motion is even worse and will often be disabled unless the shifter is in one of the lower gears.
#2341 of 2400
4x4 necessary? by toyotapilot
Jun 02, 2009 (11:39 am)
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I'm thinking of getting a 2005 RAV4 with manual transmission. I'm finding more 2 wheel drive cars than 4x4, plus they cost a lot less. Are 2wd RAVs nearly as good in the snow as 4x4s and isn't that about the only time you'd use it? Thanks!
#2342 of 2400
Re: 4x4 necessary? [toyotapilot] by wwest
Jun 03, 2009 (12:00 pm)
Reply

Replying to: toyotapilot (Jun 02, 2009 11:39 am)

Since the RAV4 is FWD, or at best F/awd, the manual transaxle was dropped in later models for safety reasons, to protect the unwary or inexperienced drivers. VW has just announced a solution for that potential problem and so we may soon again see stick shifting in more FWD and F/awd vehicles.
 
The RAV4 is a F/awd system NOT/NEVER a 4X4 or 4WD.
 
For the RAV4 "2WD" is really FWD and I would NEVER advise anyone north of te snow line to purchase one without VSC/TC/ABS/BA/EBD/Etc, and even then NEVER with a manual transaxle.
 
If you have a HIGH experience level/background in the operation of FWD in wintertime conditions to begin with, and then transition to one with a stick shift, then maybe.

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