Last post on Aug 21, 2013 at 5:16 PM
You are in the Toyota Sequoia
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Toyota Sequoia, Toyota Highlander, Toyota 4Runner, Toyota Land Cruiser, Toyota RAV4, Toyota Tacoma, Truck, SUV
#181 of 2493 Real WORLD
Jan 02, 2002 (12:30 pm)
Yesterday my wife and I took our daughter and our three GRANDkids up to Snoqualmie Pass to play in the snow. Since there were seven of us I couldn't take the 2001 RX AWD so I borrowed the company's AWD Aerostar.
Driving into the upper parking lot at the summit became a challenge, one after another I watched as vehicles had to give up the "climb", back down and turn around.
A Dodge/Chrysler FWD minivan was first, almost made it but then lost traction and never regained it. Honda Odessey next, even less success. Toyota HL, couldn't tell the model, didn't even make it to mid-point. Aerostar not only did fine there but went all the way up to the third parking area.
Our youngest grandson soon got too cold and my wife and I returned with him to the car. My curosity got the best of me so I cruised the lower parking area until a parking spot opened up within sight of the bottom of the first incline.
Lots and lots of vehicles couldn't pull the incline, most of them recognizably FWD. Quite a few vehicles did make it but some that didn't were quite a surprise.
An 01 or 02 (VSC badge) RX AWD. He was clearly having trouble on the incline but he wasn't going to give up easily. I finally got out of our car and walked over to help by pushing and of course this made him just a little peeved. He finally had to give up and back down the incline.
It was clear that his rear wheels were "driving", but apparently not enough to be of any help. I thought that I could also hear the TRAC "thumping".
But the real surprise of the day was a late model 4runner that couldn't pull the incline. That driver was REALLY peeved. He even put in "low" range before he finally gave up.
Absolutely no one seemed to have any trouble (driving, walking is another story)within the snow and ice packed LEVEL parking areas.
Maybe 5% or less, and about 25 yards, packed snow and ice with some gravel and sand. We arrived late in the day, around 2 PM, and I'm sure the incline had been sanded early that morning but by now there was clearly more slippery surface than otherwise.
It was so slippery in the center that you couldn't walk on it without falling and I watched several kids slid down the center of the incline in their ski boots.
Why did the Aerostar do so well, equipped with simple summer tires, over others that shouldn't have failed? I don't know enough to be really sure but I suspect it was the fact that the Aerostar is basically RWD, 30/70, and switches to 50/50 if the rear wheels begine to slip.
But why didn't the 4runner make it? The driver was using a conservative approach, not gunning it like most would.
I'm wondering if this new type of LSD, using the brakes for implementation, just isn't up to these types of challenges. The reports I keep hearing is if you aren't carrying enough forward momentum when you hit a slippery area then you dead in the (frozen) water.
Is there anyone out there with this type of experience with the ML?
Jan 02, 2002 (2:58 pm)
Tested the center diff lock this afternoon. After dropping the trans into low the diff light flashed until I applied torque and then it locked up almost instantly. I guess cliffy was right once again. Which reminds me, wasn't wwest going to give us a point by point clairification as to the reasons he believes that cliffy is "wrong on so many points"?
#183 of 2493 Almost instantly..
Jan 02, 2002 (4:15 pm)
"As soon as I applied torque" (and the gear spines rotated into a "matching/mating" position).
Yes, Cliffy WAS right.
I ordered the Sequoia owner's manual and shop manuals over the holidays, I want to be correct by Toyota's "standards". They could also be wrong, but I'll do my best.
That reminds me of an electrical engineer who once was asked, "how long after I apply the electrical power will the (LARGE) power supply capacitors be charged so the computer can command the machine bed movement?"
"Right away" was his instant, non-hesitating answer.
So the computer programmer wrote the control program to first, turn on the power, and then the next instuction, 200 nanoseconds later, commanded a machine movement.
At 60Hz it took about 300 milliseconds for the power supply capacitors to reach 90% of full charge. The engineer's answer was only off by a factor of 1,500,000 to 1.
#186 of 2493 to HOST
Jan 03, 2002 (11:35 am)
Thanks, I think we all needed that.
Jan 03, 2002 (12:11 pm)
Thanks for taking the time to do that! All of my questions are now answered........forums like this are great! Thanks to cliffy as well...........
Jan 03, 2002 (12:47 pm)
I don't understand why you bought the shop manuals for the Sequoia. I was under the impression that you DO NOT own a Sequoia. At any rate I may order them too. Could you please post the publication number and the phone number to facilitate ordering for others who also might like to order these manuals? Thank you.
#189 of 2493 shop manuals
Jan 03, 2002 (1:03 pm)
I just simply went to the Bellevue Toyota dealer's parts department and placed my order, prepaid and they will mail them to my office.
When someone asks a question on one of these threads that potentially has a safety aspect I will not guess at the answer. I think of buying the manuals not any different than buying any textbook, "book of knowledge".
Jan 04, 2002 (9:25 am)
Don't those shop manuals cost about $120? You spent that kind of money so you could verify my statements on an Internet bulletin board? Wow. I guess I feel honored.
As to your story of the 5% incline, I too am curious. It is my experience that many drivers haven't a clue as to how to properly operate their vehicles in the snow. Momentum is everything when dealing with extremely slick surfaces as you described. It is quite possible that you were the only one to hit it at the proper speed to make it up.