Question about 1999 Ford Expedition

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Why does 1999 all time 4wd run heavy and knocks when at slow speed when hi 4 x 4 is engaged as if transm failed i had to remove the shaft to make it run on rear wheel only until i fix the problem?

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Suggest you have the clutch pak replaced on the transfer case, and add new oil of course. but also have the solenoids change while they do the transfer case. About 1600 at the dealer. You did not mention condition of the universals, or CV joints.

Posted on Apr 07, 2009

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99dodge 2500 4wd 360 eng. transmission doesn't change correctly and 4 we does not engage at times.


Knocking on cold start may be hydraulic valve lifter collapsed until engine builds oil pressure. Quality oil filters contain anti-drain back valves which help prevent this, while cheap filters do not. Try using Wix filters and quality oil in correct weight for your local expected temp range. Trans issue may relate to dirty trans filter. When did you last change trans filter and fluid?

Dec 26, 2014 | 1999 Dodge Ram 2500 4WD

1 Answer

How do I know if my 4WD is working overtime in my vehicle? Everyone keeps telling me to drive in 2WD while riding in the city but I don't see an option for 2WD, My gear shift only reads: 4WD hi, Neutral,...


The transfer case in your Jeep has what's called a viscous coupler inside of it. Though you physically put it in 4 high, it does not operate the front wheels unless the rear wheels begin to slip. Therefore, driving on dry roads, you actually are only using the two rear wheels.
On direct engagement transfer cases, you would need to physically select 4wd. Those shouldn't be driven on dry roads extensively.
So, your friends are correct, pertaining to most 4x4"s but not yours (I don't know for sure if any other 4x4's use that system except for Land Rover).
One thing you need to know about yours is that you MUST always have the same exact tires on all four corners.... Size, brand and age. (rolling circumference) If you don't it will fool the transfer case into thinking a wheel is slipping and that will cause the coupler to fail, because it will stay engaged when it's not needed and overheat.
4 low is only used when in very deep snow or pulling a heavy load. Max speed in 4 low is about 15mph.

Feb 15, 2011 | 1995 Jeep Grand Cherokee

1 Answer

Having activation problems. How exactly do you activate the 4 wheel drive on a 99 Jeep Cherokee?


Just pull the control lever one notch rearward. first position is 2wd, next is "part time 4wd". after that is neutral (only used when your vehicle is being towed) and last is 4 low, only used when pulling heavy loads at low speeds on slippery surfaces. Best to engage 4wd while rolling at under 30mph. If dash light remains on after shifting back to 2wd, usually backing up about twenty feet or so will disengage it.
If doing what I said does not get you into 4wd, then you need to have someone qualified look at it to make sure the transfer case, front differential and both front axles are in good condition.

Dec 16, 2010 | 1999 Jeep Cherokee 4WD

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What is auto 4 wheel drive?


Auto 4 wd is when the Silverado's PCM takes readings from the front and rear driver shaft and when there is any detection that the speeds are different. The Auto 4WD will activate the transfer case to lock it self to 4wd until the front and rear drive shaft are running at the same given speed of rotation.

Thank you for using fixya

Aug 24, 2010 | 2000 Chevrolet Silverado

1 Answer

Dont know how to use my 4wd


You first have the car running and as long as you are going or driving under the speed of 55 mph you can put it in 4 wheel drive high. for low come to a stop put in neatural and switch to low. put in drive and go. max speed 10 mph

Apr 20, 2009 | 1999 Isuzu Rodeo

1 Answer

4wd does not engage in hi, in 4wd low the light blinks, still no


Hi...
I own a 98 blazer. There's a module that has failed in the 4WD part of the truck . I had to have mine replaced at about 70,000 miles

Jan 12, 2009 | 1999 Chevrolet Blazer

2 Answers

91 Jeep Wrangler Sahara, 2WD won't engage, 4WD is fine!


It sounds like your driveline to the rear wheels is broken. Could be transfer case output shaft to the rear wheels has broken. Try disconnecting the rear drive shaft and see if you can turn it by hand with the transfer case engaged in 2WD. If you can turn it while the Sahara is in gear, the output shaft is no longer connected to the engine for some reason.

Dec 29, 2008 | 1991 Jeep Wrangler

1 Answer

99 RAM 4x4 Front Axle Knock


that is not normal
there is a problem in the drive shaft by sliding so fa into the diff the cv joint"U" joint is no longer directly in line with the kingpin and is binding up as the steering direction is varied
the center line of the joint has to remain directly inline with the turning point ( king pin, strut ) so that as the axle is turning and the steering is turned the joint is in the same plane
check why the axle is allowed to move in and out and you will have your problem solved

Mar 31, 2017 | 1999 Dodge Ram 2500 4WD

2 Answers

Im having a problem with my 2002 ford pe courier, whwn i am in 4wd i get a really loud clunking noise from the back of my transfer case


sounds like you have a u-joint going out or that is out. head down to your parts store or look under neth and grab your drive line and try to move it back and forth. in a twisting motion, there shouldnt be any play between the two yokes.

Nov 04, 2008 | Ford Ranger Cars & Trucks

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