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10-26-2005, 09:32 AM
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#1 (permalink) |
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Walking
Join Date: Oct 2005
Location: chicago
Drives: 2002 suburban LT
1999 cobra vert-1/4 high 12's
Posts: 2
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newbie here, 4x4 question
 like the title says newbie here, i am a regular on a few svt sites(insert boo's and hisses) first post here and i have a question for you guys. i bought the suburban used this spring, a 2002 LT with almost every option i think. anyways it was very wet out and i had a ton of leaves so i decided to throw it into 4hi and punch it...with the new tires it just stuck i took off. i went to make a u turn, slowly and i felt this real bad shudder. it doesnt seem to be as pronounced on left turns as it is during right ones. now the only other 4 wheel drive car i have ever driven in 4wd is a jeep and it didnt feel like that. i posed the question on another forum and said that i should never put it in 4hi unless i am in snow/mud and that it is normal. to me if felt like it was slowing the car down and just not right(i know real technical). anyways i thought i would ask you guys, other than this i have had no problems and love the car, except for the gas mileage but i knew that coming into the purchase. only mods so far are a drop in K&N and some new tires, yokoham geolander h/t-s. thanks for any and all replies |
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10-26-2005, 10:09 AM
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#2 (permalink) |
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4.6 Liter Northstar V8
Join Date: Jun 2005
Location: The Lonesome Crowded West
Drives: 04 GMC Sierra
06 Dodge Magnum
Posts: 1,508
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Re: newbie here, 4x4 question
You don't wanna use 4x4 (4hi or 4lo) on dry pavement. Your part-time 4x4 system requires that the tires be able to slip when you turn, otherwise you start binding up the axles until one of the tires breaks loose from the pavement. That's probably the shuddering you feel. Oh, and I just bought those same Yokohama's for my Sierra, they rock... anyway, try engaging the 4wd on gravel or mud and see if you still get the shuddering.
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10-26-2005, 10:16 AM
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#3 (permalink) |
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GMI Staff Member
 Join Date: Sep 2004
Posts: 10,058
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Re: newbie here, 4x4 question
It has been my experience that binding occurs on GM's in 4-HI unless the pavement is very slippery. 4HI should only be used in low traction conditions.
__________________
GM dealer parts manager since 1994 GM dealer parts counterman 1987-1994 holder of numerous automotive accreditations too many in number to list here... GMCSonoma/August 27, 2009 |
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10-26-2005, 10:28 AM
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#4 (permalink) |
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6.0 Liter L76 V8
Join Date: Jul 2005
Location: Ottawa, ON/Daytona Beach, FL
Drives: 2000 Regal
Posts: 2,267
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Re: newbie here, 4x4 question
As well, I believe using it on dry pavement can cause some damage over an extended period.
__________________
 2000 Buick Regal Last edited by Buicktech : 10-26-2005 at 10:50 AM. |
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10-26-2005, 11:10 AM
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#5 (permalink) |
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6.2 Liter LS9 Supercharged V8
Join Date: Sep 2003
Location: N.W.Ontario
Posts: 5,505
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Re: newbie here, 4x4 question
Think of an arc (( in a turn the back tires don't travel as far as your front tires. The 4x4 system does not allow the front and rear axle to turn at different speeds on your Suburban. So the tires have to slip, hence the chattering.
On many other AWD system, like some Jeeps, there is a cluth in the transfer case that allows either axle to turn faster or slow than the other. |
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