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Its a ford. 1993 f250. And nothing yet i just bought the…

Customer Question
1993 f250 Mechanic's Assistant:...

1993 f250

Mechanic's Assistant: Are you fixing your F250 yourself? What have you tried so far?

Yes and nothing yet i just bought the truck

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

It make s a steady knocking sound when i engage it into 4x4

Mechanic's Assistant: Where exactly do you think the noise is coming from? And how long has this been going on?

The front end and i just noticed it today when i used the 4x4 idk how long this been going on just bought it

Submitted: 4 months ago.Category: Chevy
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Answered in 10 minutes by:
3/23/2018
Chevy Mechanic: Jerry Newton, Chevy Technician replied 4 months ago
Jerry Newton
Jerry Newton, Chevy Technician
Category: Chevy
Satisfied Customers: 5,694
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
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Is it knocking when the vehicle is moving? When turning? When sitting still? Tell me more about the knocking.

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Customer reply replied 4 months ago
When im movong after i engage the 4x4
Customer reply replied 4 months ago
It doesnt matter if its in 4 high or low rang and the hubs are engaged manually on the front tire hub
Chevy Mechanic: Jerry Newton, Chevy Technician replied 4 months ago

And the knocking is consistent with vehicle speed, if you go faster, the knocking is faster?

I'd be looking at the front drive shaft U joints, can you crawl under there and check that out? With the hubs unlocked and the shifter in 2HI, you should be able to spin it by hand. Give it a good shake, see if it has any loose joints.

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Customer reply replied 4 months ago
I goes by the speed of the vehical and it stop when im just in*****
Customer reply replied 4 months ago
I would go out there and check butt were having a winter storm right now in north dakota i got stuck in the snow thats how i found out about this problem
Chevy Mechanic: Jerry Newton, Chevy Technician replied 4 months ago

This is going to be a front driveshaft U joint or possibly a front axle joint, even with the hubs unlocked, the front axle joints can make a heck of a racket when they're loose. That's what I'd be looking for on this. I understand you are snowed in, but when you get back to working on it and if you have questions for me, you can respond here and I can help you figure this out once you're able to actually put your eyes and hands on it.

Please take a moment to rate my answers by clicking on the stars at the top of the page, that's how I get compensated. If you need more help, just let me know, I am happy to follow up.

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Customer reply replied 4 months ago
When the hubs are unlocked it doesnt make t he sound at all
Chevy Mechanic: Jerry Newton, Chevy Technician replied 4 months ago

There is no load on the drivetrain when the hubs are unlocked, so that makes sense. If you crawl under there like I mentioned before and just spin that driveline back and forth by hand, you can see the U joints on the shaft and on the axle ends moving, and you'll be able to see if any of them have a joint that came apart.

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Customer reply replied 4 months ago
When i go to unlock the hubs and roll back and forth to make sure its disengaged...its fine and you dont here anymore knocking
Customer reply replied 4 months ago
How much is it to have replaced or if i did it myself how long would it take and what would happened if i did nithijng about it?
Customer reply replied 4 months ago
Nothing
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