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Old 07-29-2019, 06:10 PM   #1
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Default Front wheels don't spinn free....

1993 D21 4X4 with both front wheels off the ground the wheels don't spin freely. They are darn stiff like the brake is slightly engaged. Any ideas? I've never had a car or truck that the front wheels wouldn't turn freely.
The calipers and pads seem free of the disk's. I don't hear anything while I turn them. Next weekend I plan to disassemble the calipers and pads and check the disk for run out. Also want to bleed all four.
I guess I could move the calipers up and off the disk then replace the wheel and spin it?

Another question; To bleed brakes with ABS (1993 has ABS?) is it important to disconnect the battery? I've read someplace here (I think) that the battery must be disconnected. I don't understand why but whatever.
130,00 miles and the front end is very tight no wiggle or movement.
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Old 07-29-2019, 08:07 PM   #2
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No idea why the front wheels don't spin. But I might be able to help with the ABS... I've always just bled it out normally. No need to disconnect the battery since the ABS pump shouldn't be getting power with the key off. Maybe on some newer cars but I don't think it matters on a 93.

Don't let the reservoir run dry though. What you don't want to do is suck air into the ABS pump.
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Old 07-29-2019, 09:19 PM   #3
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its not a broken hub is it? like its jammed in 4wd trying to spin the driveshaft? or jammed in 3wd as it might be.
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Old 07-29-2019, 11:20 PM   #4
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Do you have any movement in the wheels as far as grabbing tire top and bottom and moving them? Is the truck in 4HI?

Best bet is to jack it up and pull the wheels, then pull the calipers and see if the hubs are still hard to turn.

If they spin freely then the problem is the brakes, bad/corroded slides, bad calipers, or even misplace pads.

If the hubs are still difficult to spin, then you will have to disassemble the hubs. not a hard task, just time consuming. Lay the parts out in order as you disassemble and remember direction. Inspect the parts as you pull them out.

If it looks everything looks ok. I would put the t/case in neutral and see if you can spin the front driveline (t/case to front differential). This will tell you if the problem is in the t/case or diff.
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Old 07-30-2019, 03:02 AM   #5
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I have not worked on these 4WD's. Had one, but didn't have it long enough for anything to really go wrong.

But could it be the axle nuts are just too tight? Those flat nuts with the cotter pin and cap?
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Old 07-30-2019, 03:44 PM   #6
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The best I can tell it's not in 4 wheel drive, that occurred to me as well. When I engage 4 wheel drive I can clearly feel a difference.
I guess the best thing is to remove the calipers as see what's up.
I'll just bleed like normal with key off, thanks!
Thanks Guys!
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Old 07-30-2019, 06:59 PM   #7
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you dont need to "remove" the calipers. just open them like youre doing a pad change.
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Old 09-16-2019, 03:20 AM   #8
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Did you try turning the hubs at the wheel? Even though the trans is not in 4WD the front and rears are still. I figured out that the hard way when I first picked up my truck. The truck was not able to drive so I rented a tow dollie. When I started to pull away, the rear wheels were locking up. I knew trans was in Neutral so I finally figured out that it was the locking hubs at the front wheels.
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