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Old 01-01-2025, 05:08 AM   #3
Richard
Senior Member
 
Join Date: Dec 1999
Location: Southern California
Posts: 2,977
Re: Should front driveshaft spin in 2wd?

It can happen. Probably would be from coupling of rotating gears/shafts in the tcase from the oil or excess grease in the hubs coupling to the axle shafts. No offense to previous poster, not sure how a vacuum could be created in the diff or tcase. As the assembly works it would create heat which would equal pressure. There are vents to alleviate that.
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Richard
1972 K10 Custom Deluxe SWB Fleetside
My build https://67-72chevytrucks.com/vboard/...d.php?t=800746
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