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I own a cherokee '90 .what is the easiest way to test if my transfere case works correct.If a put my car on the mainroad into 4wheel drive it makes a sound as if the whole case falls apart.If I than take a turn I get the impression I'm driving a kangaroo,because the car just jumps through the turn.Getting it back from 4wheel to 2wheel drive is almost impossible.
Can anybody help me ,because after having some troubles with my dealer I don't trust his opinion anymore Regards GĂ |
#2
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It sounds like you are getting 4wd by they description of the shake when turning a
corner. The sound you get that you say sounds like the t-case coming apart sounds like the binding and realease of load in the drivetrain. Have a look at your tires, do they have the same amount of tread left on them between the front and rears? If they don't then shifting into and out of 4wd can be hard because the ease of shifting depends on all wheel spinning about the same speed. If the rear tires have significantly less tread than the front, they will be spinning faster than the front causing shifting problems in the t-case. Driving on dry pavement with tires that are worn unevenly like this can damage the t-case due to the fact that two tires are spinning faster than the other, but because they are all mech linked to each other you get a loading of the driveline that can then cause a loud bang as something gives. On slippery or dirt surfaces this is not a problem as the loose ground prevents the drivetrain from loading up. The shake when cornering is caused by the U-joints. A u-joint, when it is at an angle, speeds up and slows down as it rotates, this is why the driveshafts have two u-joints, they cancel out this characteristic but the front axleshafts only have one each. A CV or constant velocity joint doesn't do that due to its design. The grand cherokees that have full time 4wd use CV joints on the front axle so this shake doesn't happen. A good safe way to test is to get 4 jack stands and put your vehicle up and watch for all four wheels turning, just make sure you shift into 4wd with the wheels stopped as attempting a shift with the rear wheels turning will give you an unpleasant and loud grinding. |
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