Last post on May 12, 2013 at 12:04 PM
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Toyota 4Runner, Concept Cars, Future Vehicle, SUV
#575 of 769 2010 4Runner Automatic Limited Slip Differential
Jan 26, 2010 (9:32 pm)
Bought 2010 4Runner SR5 4x2 yesterday. Sales literature, sales people, and owner's manual seem to be a bit slippery on defining the "automatic limited slip differential." Is it a legitimate posi-trac type rear differential, or is really just a marketing gimmick to hide that it is an open differential that wheel slippage is
controlled by braking/engine management via the "traction control" feature? If so,
the traction control and automatic limited slip differential are, in reality, one in the same.
Any Toyota factory people out there that can answer?
#577 of 769 Re: Good Road Test of the 2010 4Runner [cliffordn]
Jan 28, 2010 (12:46 pm)
cliffordn - thanks for posting the driving blog of the 4Runner. It's a great read and only reinforces my opinion that the 4Runner is the right vehicle for my needs.
I'm still confused about driving the SR5 in 4H on dry pavement. A week or so ago, I test drove the SR5 (as well as the Limited) and the salesman (a 4Runner owner himself) told me to go ahead and put it the SR5 into 4H while driving on dry pavement... the vehicle operated completely fine/normal even when turning street corners. The only time I experienced binding was when I did a U-turn. Other than that it was fine.
Some on here say no-way, no-how to driving the SR5 in 4H on dry pavement - but it clearly can be done. Who's right?
Now, I'm back to being undecided about which 4Runner is best. I want (but don't necessarily have to have) the navigation and the X-REAS seems like a great thing... but that's where the Limited stops for me. The 20" wheels and tires seem lame... and perhaps more costly to swap out than getting an SR5.
#578 of 769 Re: Good Road Test of the 2010 4Runner [fxoffroad]
Jan 28, 2010 (1:09 pm)
Once again, and last time I will emphasize it that you can NOT drive the part time 4WD system with rear differential (2010 4Runner SR5 and Trail edition US models) on a dry pavement (also verified it with TCS) ... Here is a very nice article that explains part/full time 4WD in full detail respectively:
In conclusion, in the US, only the Limited has full-time 4WD. The 2010 4Runner Trail edition and the SR5 both have a part-time 4WD system that can not be used on dry pavement.
#579 of 769 Re: Good Road Test of the 2010 4Runner [fxoffroad]
Jan 28, 2010 (2:49 pm)
The salesman was wrong and the SR5 and Trail should not be operated on dry pavement in 4WD. Basically, on these models, when you engage the 4WD the front and real drive trains are locked in unison with each getting 50% of the power. Thus, you will get binding and damage with extended use on dry pavement.
As far as which to get, I like the Trail since it has part time 4WD and the option of equipping with the KDSS suspension system. I want to be able to drive in 2 WD on pavement. The Trail also has a locking rear differential for better traction in muck or the situation otherwise demands. Thus, the Trail has the best drive train for dry pavement while also having the best for situations that demand traction. The downside is that you can't get leather or heated seats.
#580 of 769 Re: Good Road Test of the 2010 4Runner [agnosto]
Jan 28, 2010 (2:52 pm)
Agnosto... exactly what are your credentials? I called Toyota Customer Service today and spoke w/ two representatives. The representative said that you can drive a SR5 in 4H on dry pavement. Thankfully, they are shipping me a 2010 owner's manual, to help w/ my decision.
Secondly, please check your attitude at the door... it doesn't really serve the greater good. My purpose, as I am sure is the case with most others, is to learn and make educated decisions about our (future) purchase.
As I indicated in post #577... I had a salesman (himself a 4Runner owner) tell me to use 4H on dry pavement. And I shared my experience driving the vehicle in 4H on dry pavement. Knowing that I could get a Limited 4R - I doubt he would try to undersell me.
#581 of 769 Re: Good Road Test of the 2010 4Runner [fxoffroad]
Jan 28, 2010 (4:52 pm)
I'll just say that I have no personal experience and my belief is entirely based upon info on the web. I will saying that if you experienced binding while making a u-turn it seems to be consistent with the view that 4WD is not for dry pavement with the SR5 and Trail. Please let us all know what the owner's manual states. Thxs.
#582 of 769 SR5 on-demand 4WD comment
Jan 28, 2010 (8:21 pm)
I have had my 97 SR5 with on demand 4Hi and 4Lo for 13 years. I have at times had to keep it in 4 Hi once making it onto better roads in messy NE snow/ice storms. This driving has not damaged the vehicle at all. The entire drivetrain remains as smooth as when new. I am expecting a new Limited late winter, but will keep this machine too.
#583 of 769 Re: Good Road Test of the 2010 4Runner [fxoffroad]
Jan 29, 2010 (1:10 am)
My credentials before you question them. I've been driving 4x4's since 1976. If it is binding you are ruining the 4wd. I have the 2003 model with the AWD option. It never binds. But if I try the same thing in 4H with my 2009 Ram, or my former 1991 K1500, 1997 S-10 Blazer, 1986 Toyota SR5 PU, 1985 F-250, or my 1966 K10, it will bind. So get ahead and question all you'd like, but if you have to question someone's credentials over some idiot answering the phone who hasn't a clue and is reading out of a manual, then be prepared for failure.
Better yet, just buy it and drive it in 4H, make lots of U-turns, then come back on here and complain about how your 4WD blew in 4H.
#584 of 769 Re: Good Road Test of the 2010 4Runner [canddmeyer]
Jan 29, 2010 (5:45 am)
Yeah... the binding occurs when you push the vehicle to extremes by turning the steering wheel past its "tolerance threshold" (for lack of a more technical term). Like you (canddmeyer), I have owned a variety of 4x4's include an '03 F250, '95 Range Rover, '94 Mistu Montero and others.
I'm simply trying to decide whether to purchase an SR5 or a Limited because my better half will be driving the vehicle during snow events here in Colorado-and that "set it and forget it" route for that driver. If I the only driver, it'd be a slam dunk, I'd get the SR5. Unfortunately, I can see my better half going through the Starbucks drive-thru... in 4H and freak out when the vehicle binds. I want to avoid that. I also plan to do a lot of off-road driving, so this dual purpose requires some thought. In my Range Rover or Montero... you could drive in 4H and pretty much forget about it (except for tight turns). Hence my questions about the 4 Runner.
And thanks so much for the attitude... really helps!