Question about 2001 Jeep Grand Cherokee

1 Answer

1996 ZG Grand Cherokee 4.0 litre 6 permanent 4 wheel drive

When you jack up a single front wheel should you be able to turn the wheel becuase the viscous coupling slips? On mine you cannot turn one of the front wheels when it is jacked up. Thank you.

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 475 Answers

It takes alot of torque to get the viscous coupling to turn.
There is nothing wrong with your vehicle.
If you can turn the wheel, then you need a 700.00 viscous coupler.(plus labor)

Posted on Oct 07, 2008

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How to tell if 4wheel drive is working on a 1998 chevy blazer


Depends on the system.
It is impossible to drive a true 4 wheel drive vehicle on the road due to wind-up between the axles so first a unidirectional clutch was fitted into the front drive to prevent wind-up but the main problem of one wheel losing traction and the whole vehicle becoming stuck remained.

Over the decades differential locks and/or limited slip differentials have been fitted to overcome the basic problems.

In more modern times refinements, often to cut costs, such as viscous couplings have been used to produce automatic or part time 4 wheel drive vehicles and the development of abs and later more powerful computers added traction control systems.

Jacking each wheel in turn from the ground should reveal whether drive is being transmitted to it. When there is a centre differential lock or it is of the limited slip variety, using a jack with good wheels and on smooth ground lift first the front and then the rear and attempt to drive. If it is working in each case the vehicle will move and should roll the jack along the floor.

The front and rear differential locks can be tested in a similar fashion but 3 wheels will need to be raised.

Nov 14, 2017 | 1998 Chevrolet Blazer

1 Answer

What happens if, in a Subaru WRX 2.0, the hand brake is engaged while driving? Will all wheels lock up when the rear wheels are locked by the hand brake as a result of the viscous coupling?


only the wheels with the hand brake will lock up
the viscous coupling will still allow the front wheels to turn but it will put a large strain on the viscous coupling possibly causing early failure

Apr 01, 2017 | Subaru Cars & Trucks

1 Answer

Why do I only have rear wheel drive in my 2003 Ford Explorer . The 4x4 doesn't work at all


It is nearly impossible to drive a true four wheel drive on normal roads because the front wheels travel further than the rear wheels there is soon wind-up between the axles and one wheel must be jacked from the ground to release it so a little further can be driven.

It is for that reason such measures as an overrun clutch is used in the drive to the front or a viscous coupling to the rear, effectively making road cars into part-time 4 wheel drive vehicles. In the case of the former the front wheels will only drive noticeably when traction is lost to the rear. This makes it difficult to check whether there is drive to the front.

Raising the rear of the vehicle on level ground, using a wheeled trolley jack and then gently attempting to drive forward will soon prove whether there is drive to the front wheels.

If there really is no drive the fault is likely to lie within the transfer box or any electronic control system and more research will be needed.

Jan 23, 2016 | Ford Cars & Trucks

1 Answer

Why can't my 2006 jeep go into 4 wheel drive?


are you on dirt? or pavement...????????????????????????
we cant answer until you answer what 4wd option you have.
if that makes no sense, then read the operators guide,
it tells you what's there and how to use it.
read that first, then ask questions,?
and if Part time 4wd?, it';s not to be used on dry pavement only ICE.

eg:

4WD: Select-Trac (or older Select-Drive has a slip coupling too, NP129/229) is AWD in that, "the "4Hi" setting the drive shafts were coupled together using a viscous-type coupler " this anti wind up slipper"
Watch out for exception 1: Select-Trac NP228 based jeeps, it does not have a viscous-type limited-slip coupling. It was used briefly in 1986.
Quada-Trac is full time 4WD (not in lock mode) has a real center differential to shift torque between front and rear. This is the best system , not just a slip clutch as above. Then went BACK to the slipper in 1980. (odd huh?) Up to 1998.
Quadra-Trac-II "4-All Time", "N" or neutral, and "4-Lo". In "4-All Time", torque is applied to the rear wheels under normal driving conditions.
If the rear axle starts rotating at a significantly higher rate than the front axle, hydraulic pressure builds up in the gerotor oil pump and causes the clutch pack, to progressively transfer torque to the front axle, until both axles return to the same speed
Quadra-Trac I was introduced in 2004-10, same as above but is automatic with no driver controls ,like above.
The Quadra-Drive system was introduced in 1999 and is based on the Quadra-Trac II system but adds limited slip differentials (the best full time system ,with great traction to all wheels all the time) 1999 to 04.
Quadra-Drive-II has electronic limited slip differentials or ELSDs 2005 up.

Aug 01, 2014 | 2006 Jeep Grand Cherokee

1 Answer

Why wont my jep go into 4 wheel drive when I pull th lever?


which system?
we cant guess what is In YOUR CAR, ever.
you must SAY. or RTM, in the glove box.
and why are you using 4wd on dry pavement, now>?


4WD: Select-Trac (or older Select-Drive has a slip coupling too, NP129/229) is AWD in that, "the "4Hi" setting the drive shafts were coupled together using a viscous-type coupler " this anti wind up slipper"
Watch out for exception 1: Select-Trac NP228 based jeeps, it does not have a viscous-type limited-slip coupling. It was used briefly in 1986.
Quada-Trac is full time 4WD (not in lock mode) has a real center differential to shift torque between front and rear. This is the best system , not just a slip clutch as above. Then went BACK to the slipper in 1980. (odd huh?) Up to 1998.
Quadra-Trac-II "4-All Time", "N" or neutral, and "4-Lo". In "4-All Time", torque is applied to the rear wheels under normal driving conditions.
If the rear axle starts rotating at a significantly higher rate than the front axle, hydraulic pressure builds up in the gerotor oil pump and causes the clutch pack, to progressively transfer torque to the front axle, until both axles return to the same speed
Quadra-Trac I was introduced in 2004-10, same as above but is automatic with no driver controls ,like above.
The Quadra-Drive system was introduced in 1999 and is based on the Quadra-Trac II system but adds limited slip differentials (the best full time system ,with great traction to all wheels all the time) 1999 to 04.
Quadra-Drive-II has electronic limited slip differentials or ELSDs 2005 up.

Aug 01, 2014 | 2006 Jeep Grand Cherokee

1 Answer

My local mechanic claims that the AWD system on my gallardo is not working bec when he turns the rear wheels, the front wheels dont turn. I thought, the car had a center viscous coupling that only engaged...


Is he turning both rear wheels in the same direction? if so the fronts should spin. and yes the car has a front diff. If it didnt, the car would not park.

Nov 26, 2010 | 2004 Lamborghini Gallardo

3 Answers

Rear cluch not working


Depends on what model and components you have:

{ ...
ENGINE TORQUE DISTRIBUTION – DIRECTING THE FLOW OF POWER
In an all-wheel-drive vehicle, engine power can be directed to all four wheels. Subaru Symmetrical AWD differs slightly from model to model in how it directs power to the wheels, depending on its transmission.

MODELS WITH FIVE-SPEED MANUAL TRANSMISSION – CONTINUOUS ALL-WHEEL DRIVE: A viscous-type locking center differential and limited-slip rear differential help distribute torque – normally configured at a 50/50 split front to rear. If wheel speed differs between front and rear axles, the center and/or rear differentials lock up to help distribute power to the wheels with the most traction.

MODELS WITH FOUR-SPEED AUTOMATIC TRANSMISSIONS – ACTIVE ALL-WHEEL DRIVE: An electronically controlled variable transfer clutch and limited-slip rear differential distribute power to where traction is needed. Sensors monitor parameters such as wheel slippage, throttle position, and braking to help determine torque distribution and direct it to the wheels with optimum traction.

MODELS WITH FIVE-SPEED AUTOMATIC TRANSMISSION – VARIABLE TORQUE DISTRIBUTION ALL-WHEEL DRIVE: As with Active All-Wheel Drive, an electronically controlled variable transfer clutch distributes power, but through a planetary-type center differential and a viscous-type limited-slip rear differential. Torque distribution is normally configured at a performance-oriented rear-wheel-biased 45/55 split front to rear. Sensors monitor the same parameters as for Active All-Wheel Drive.

WRX STI, WITH SIX-SPEED MANUAL TRANSMISSION – DRIVER CONTROLLED CENTER DIFFERENTIAL (DCCD) ALL-WHEEL DRIVE: The STI uses an electronically managed multi-plate transfer clutch and a mechanical limited-slip differential in conjunction with a planetary-gear-type center differential to control power distribution between the front and rear wheels. Featuring manual and three automatic modes, DCCD is normally configured at a 41/59 split front to rear. Sensors monitor parameters such as wheel slippage, steering angle, throttle position, and braking to help determine torque distribution and direct it to the wheels with optimum traction. DCCD also features a limited-slip helical front and Torsen® rear differential. ... }

And what are the symptoms? How do you know the coupling to the rear is not working?

Jun 05, 2010 | 1995 Subaru Legacy

1 Answer

Does the all wheel drive lock in and out on my astro van mine is staying locked in


This van uses a viscous coupling system much the same in function as the fan on your engine.There is a thick silicone fluid in a housing which is bolted to the water pump. While not mechanically locked,the thick fluid makes the fan turn with the engine.Your van has a transfer case which looks similar to a normal truck unit,but it has a viscous coupler inside ,not gears,so there is a slip factor between front and rear differentials.It is the internal friction of the fluid that drives the front differential,not a locked set of gears. Watch tire sizes, the difference in having 2 new and 2 used tires can cause a noticeable "drag".Always buy 4 tires of the same brand and size for your van.

Apr 09, 2010 | 2000 Chevrolet Astro

1 Answer

Does anyone know anything about a viscous disk in a drive shaft to a 1999 Jeep grand cherokee?


viscous coupler is inside the transfer case. Failure is not "chronic" but they do fail. Easiest way to make one fail is to use different sized tires front and back (one size at front, different on back. tires do not need to be marked differently as tire actual height varies with manufacturer)...,a one inch difference in height results in a 3inch difference in tire rolling distance. Since all your wheels are connected to a single point, the transfer case, eventually if everything was not permitted to slip, something would snap. With different rolling distances, the coupler needs to slip all the time, which causes it to overheat and fail. Being a mechanical component, they do fail all by themselves sometimes though.

Sep 13, 2009 | 1999 Jeep Cherokee

2 Answers

1995 Jeep, grinding,jolting wheel movement when turning


the jeeps with awd or full time 4wd have a viscous coupling in the transfer case that transmitts power to the front axle when the rear looses traction. if the tires on the jeep are mismatched or the tires are not properly inflated it can engage the awd thus forcing the front and rear axles to turn at the same speed. when turning, the front wheels must turn faster than the rear because they are following a wider arc than the rear, this causes binding in the drivetrain which is releived by the tires slipping on the pavement sporradicly. the viscous coupling is filled with fluid that, when heated by the friction of the input spinning faster than the output, locks the coupling. a mismatch in tire sizes or tire inflation can produce just enough heat to lock the coupling in summer, but not in winter. to make a long story short, these vehicles are very sensitive to diffeneces in tire diameters.

May 23, 2009 | 1995 Jeep Grand Cherokee

Not finding what you are looking for?
2001 Jeep Grand Cherokee Logo

Related Topics:

218 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...