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Tree rat eradicator
Joined: Sun Mar 11th, 2018
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Have you gone under the truck to test things out?
With the front end up on jackstands and truck in 2wd you can try to spin the front d shaft, now you can see what the front diff working sending the power to the axle with the least resistance (open diff)
Put the t case in 4wd and you should no longer be able to spin the front shaft, it should be locked up with the rear.
Put it back in 2wd and try to spin the axle shafts (behind each front wheel), does the hub grab the axle shaft and lock it to the wheel? With auto hubs it should. If it does not then your hubs are bad
This way you can determine that the hubs are in fact the issue
No I haven't done all that but I will,I bet it shows it's the hubs though. I know there's power to the back wheels in 4X4 and until just recently when the popping started the 4X4 worked fine,but it's better to be safe than sorry. Not that changing it over to manual lockers is sorry ;).
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1994 F150 XLT
1999 Ranger XLT 4x4