Please Help
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Joined: Sep 2008
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From: Texas
So I'm guessing there isn't a safe way to test the 4x4 without putting it on jacks. So is there anybody that can tell me what i should expect when I have the truck on jacks with 4low on? I have heard that only the driver side should spin, is that correct? only 3?
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Joined: Sep 2009
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From: The Shenandoah Valley
Safest way is with truck on ground out in some slick grass, mud, or sand and a steep hill doesn't hurt. Flying gravel can damage the paint.
It's very possible that only tree wheels actually spin however, two rears maybe connected with that limited slip rear differential and maybe just the right or left front wheel spinning at 2X speed while the other stays still as usually there is no limited slip in the front differential.
It is just as possible that even with the same open front differential, both front wheels spin when all 4 are in the air.
Limited slips in front slightly change steering feel if hubs engage.
Even with an open differential, power is evenly distributed to both wheels as long as traction is available. If the right rear is in the air, no power is delivered to the left, the right spins freely at 2x speed due to spider gears.
If you suddenly loose all traction on the right, then that limits how much power is seen at the left rear.
If you loose some traction, like spinning the right rear a little on a fast start, you still apply power at the left side ... but it's limited by the traction on the right.
If it's on a lift .... ENGINE OFF ... and you must know then that it works, turn KEY on, ENGINE STILL OFF ... and dial **** to 4wd or 4wd lo and see if front drivesghaft (not wheel) is engaged with transfer case. If so, and even with engine off, front IWEs will be engaged and you can turn the left front wheel forwards and the right should turn backwards as long as front driveshaft does not turn, which it would not if engaged at the TC and the trans is in PARK.
If you want to be sure IWEs work, start engine, leave in park, leave TC in 2wd, run lift up enough to get wheels off floor, and spin front wheels by hand. Should spin freely if TC control is in 2wd.
It's very possible that only tree wheels actually spin however, two rears maybe connected with that limited slip rear differential and maybe just the right or left front wheel spinning at 2X speed while the other stays still as usually there is no limited slip in the front differential.
It is just as possible that even with the same open front differential, both front wheels spin when all 4 are in the air.
Limited slips in front slightly change steering feel if hubs engage.
Even with an open differential, power is evenly distributed to both wheels as long as traction is available. If the right rear is in the air, no power is delivered to the left, the right spins freely at 2x speed due to spider gears.
If you suddenly loose all traction on the right, then that limits how much power is seen at the left rear.
If you loose some traction, like spinning the right rear a little on a fast start, you still apply power at the left side ... but it's limited by the traction on the right.
If it's on a lift .... ENGINE OFF ... and you must know then that it works, turn KEY on, ENGINE STILL OFF ... and dial **** to 4wd or 4wd lo and see if front drivesghaft (not wheel) is engaged with transfer case. If so, and even with engine off, front IWEs will be engaged and you can turn the left front wheel forwards and the right should turn backwards as long as front driveshaft does not turn, which it would not if engaged at the TC and the trans is in PARK.
If you want to be sure IWEs work, start engine, leave in park, leave TC in 2wd, run lift up enough to get wheels off floor, and spin front wheels by hand. Should spin freely if TC control is in 2wd.
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Joined: Sep 2008
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From: Texas
well i put it up on jacks and engaged the 4low three tires spun, the 2 in the back and the driver's side but the passenger side didn't. I went over to the passenger side tire and spun it with my hand and it would spin but not at the same speed as the others? Is this how it suppose to be, ill try to post a video. Also when i had it on jacks and just in 2w the front passenger would be every hard to spin. Am i just worrying for no reason?