Clunk/bang in 4wd - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 04-07-2016
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Clunk/bang in 4wd

This is my first post here. I have a 2005 ranger xlt with 170k in it. Overall the truck runs great but when I am in 4 hi in snow I hear a whining in the front end followed by a pretty audible clunk or bang that I can feel. Kinda feels like your hitting a pot hole. I never lose 4wd and it doesn't slip out. Thanks in advance for any ideas.
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Old 04-08-2016
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Welcome to the forum


2004 has Live Axle up front, this means front axle and driveshaft are always moving when vehicle is moving.
4WD just connects front driveshaft to the engine/trans via transfercase.

Powering the front wheels causes torque on parts that are normally dragging when in 2WD.

And there are no noises in 2WD when you apply the brakes hard or accelerate hard?

The whining noise means its rotational
Bang or cluck could be suspension
But the two together means where rotational parts meet is most likely problem

There are 2 CV joints, one on each wheel, and a CV/propeller joint on the front drive shaft.
CV joints at the wheels are always used, spinning, and used more when turning, so would expect it would be noising or clunky in 2WD as well.

CV/propeller joint were problems on the Rangers/explorers but also tended to make a noise in 2WD not just 4WD, but this is a likely candidate because of the history.

Front differential could be likely and adding power does change things, but I would expect the noise in 4WD during velocity changes, i.e. adding power then decelerating, not randomly.

So don't have a specific answer for you
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Old 04-08-2016
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Quote:
Originally Posted by RonD View Post
Welcome to the forum


2004 has Live Axle up front, this means front axle and driveshaft are always moving when vehicle is moving.
4WD just connects front driveshaft to the engine/trans via transfercase.

Powering the front wheels causes torque on parts that are normally dragging when in 2WD.

And there are no noises in 2WD when you apply the brakes hard or accelerate hard?

The whining noise means its rotational
Bang or cluck could be suspension
But the two together means where rotational parts meet is most likely problem

There are 2 CV joints, one on each wheel, and a CV/propeller joint on the front drive shaft.
CV joints at the wheels are always used, spinning, and used more when turning, so would expect it would be noising or clunky in 2WD as well.

CV/propeller joint were problems on the Rangers/explorers but also tended to make a noise in 2WD not just 4WD, but this is a likely candidate because of the history.

Front differential could be likely and adding power does change things, but I would expect the noise in 4WD during velocity changes, i.e. adding power then decelerating, not randomly.

So don't have a specific answer for you
I guess I'll check the cv's its just feels like I'll drive in 4wd and at around 30mph it bangs like something lets loose almost. But 4wd is still operational. I initianly thought it was the front diff but after it bangs at 30mph I'll get up to 40mph and it will bang randomly after the whining sound comes from the front end then bang! And its fine after that. There are no clunks or bangs in 2wd. Also no clunks or bangs when turning or hitting bumps so I would rule out suspension
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