Buliwyf
Viking with a Hammer
Hate to break it to ya, but we don't have any trucks that old. And we've had both failures. In the case of the exploded xfer case truck, it had both issues at the same time.
Front drive has to spin. The disco thing only opens one sides axle. If the drive shaft never catches up and spins, then the front diff is ''diffing out'' as you're going down the freeway. One side of the diff going freeway speeds, the other going zero. That's some serious diff action. The diffs spider gears have no bearing. If the front shaft never spins to dip them in gear oil, they'll seize to the cross shaft eventually.
Eventually spider gear friction gets everything spinning. The axle splitter just gives a nice steering feel without the lumpy unequal CV angles that you can feel with old trucks with the hubs locked in.
https://www.dieseltruckresource.com...ow-come-front-driveshaft-always-spins-174076/
https://www.gm-trucks.com/forums/topic/133778-front-driveshaft-always-suppose-to-spin/
Front drive has to spin. The disco thing only opens one sides axle. If the drive shaft never catches up and spins, then the front diff is ''diffing out'' as you're going down the freeway. One side of the diff going freeway speeds, the other going zero. That's some serious diff action. The diffs spider gears have no bearing. If the front shaft never spins to dip them in gear oil, they'll seize to the cross shaft eventually.
Eventually spider gear friction gets everything spinning. The axle splitter just gives a nice steering feel without the lumpy unequal CV angles that you can feel with old trucks with the hubs locked in.
https://www.dieseltruckresource.com...ow-come-front-driveshaft-always-spins-174076/
https://www.gm-trucks.com/forums/topic/133778-front-driveshaft-always-suppose-to-spin/
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