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Re: 4 wheel drive stopped working
The light is on.........let's see, where you having problems with clunking noises in the front, now or before when or not in 4 wheel drive? If so sounds like cv/axle shats/joints. Last time you used 4 wheel, was there a big clunk, just once? Is there an ocasional clunk when going over bumps? If so, sounds like Ujoint. I don't belive chevys use vaccum for 4 wheel drives systems at all.
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Yes the light should be on when it is in 4 wheel drive, either 4h or 4l, to engage it into 4h you need to lock the hubs then select 4h while moving. Now if u want to put it into 4L you need to first stop the truck, put it into neutral and then select 4L
under the battery there is a diaphram that has a cable that runs to the front differential, if you can squeeze in there and pull on that cable and make it work you would likely have a vacuum problem... they come disconnected from the back of the intake manifold some times, and have seen the vacuum lines come loose at the transfer case.. anyway there is a starting point!
Check front wheels there is 2 pipes going to the wheels 1 is for brake fluid to the callepers and the other one is for vacume suction to ingage or dis ingage the free wheel function 99% of the time this pipe is leaking or it is broken. enjoy !! Willem SA
THE TRANSFER CASE MOTOR IS NOT WORKING TO INGAGE 4 WHEEL DRIVE. CHECK WITH DOOR OPEN WHEN YOU PUSH 4 WHEEL SWITCH YOU SHOULD HEAR MOTOR INGAGE 4 WHEEL DRIVE. IF YOU HEAR MOTOR BUT STILL NO 4 WHEEL DRIVE THE GEAR ON MOTOR COULD BE DAMAGED. REPLACE TRANSFER CASE MOTOR.
if u got automatic front hubs stop put in park pull 4x4 shifter into 4 wheel
manual hubs at front wheels turn the hub locks to the lock position and then pull the 4 wheel shifter inti 4 wheel
also look over drivers sun visor if the tag aint worn off the direction are there... have fun 4 wheeling and keep the rubber side down
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