Pop and chucking sound when cornering

Tiny
BRYANDEARSTYNE
  • MEMBER
  • 2007 SUBARU IMPREZA
  • 2.0L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
When taking corners accelerating there is a pop and chucking sound, you can feel it. It feels like almost as if I would imagine it would be like driving on a welded differential almost.
Wednesday, March 20th, 2019 AT 5:28 AM

5 Replies

Tiny
BRYANDEARSTYNE
  • MEMBER
  • 4 POSTS
So I unplugged all wheel drive fuse and the sound has stopped for the most part.
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Wednesday, March 20th, 2019 AT 6:54 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Welcome to 2CarPros.

The first suspect since it happens on turns is a bad CV joint. Take a look through this link and let me know if it mirrors what you are experiencing.

https://www.2carpros.com/articles/symptoms-of-a-bad-cv-axle-joint

Next, place the vehicle in park, put the parking brake on, and craw under the front and grab onto the axles, one at a time. See if there is any play in the axles. Id you find there is, replace the half shaft which is both CV joints and the axle. Here is a link that shows in general how one is replaced:

https://www.2carpros.com/articles/replace-cv-axle

Here are the specific directions for replacement for your vehicle. The attached pictures correlate with these directions.

_________________________________

Axle Removal

FRONT AXLE REMOVAL
Front Axle

REMOVAL
1) Lift-up the vehicle and remove the front wheels.
2) Unlock the axle nut.

Picture 1

3) Remove the axle nut using a socket wrench while depressing the brake pedal.

CAUTION:
Remove the axle nut with vehicle weight not applied on axle. Failure to follow this rule may damage the wheel bearings.
4) Remove the stabilizer link.
Sedan model

Sedan model
Picture 2

Wagon model

Wagon model
Picture 3

5) Remove the disc brake caliper from housing, and suspend it from strut using a wire.
6) Remove the disc rotor from hub.

NOTE:
If the disc rotor seizes up within hub, drive disc rotor out by installing an 8-mm bolt in screw hole on rotor.

Picture 4

7) Remove the cotter pin and castle nut which secure tie-rod end to housing knuckle arm.

Picture 5

8) Using a puller, remove the tie-rod ball joint from knuckle arm.

Picture 6

9) Remove the ABS wheel speed sensor assembly and harness.

Picture 7

10) Remove the transverse link ball joint from housing.

Picture 8

11) Remove the front drive shaft assembly from hub. If it is hard to remove, use the STs.
ST1 926470000 AXLE SHAFT PULLER
ST2 28099PA110 AXLE SHAFT PULLER PLATE

Picture 9

CAUTION:
Be sure to replace the differential side retainer oil seal at transmission side with a new one when removing the front drive shaft.
Suspend the front drive shaft to vehicle body using a wire.

12) After scribing an alignment mark on the camber adjusting bolt head, remove the bolts which connect the housing and strut, and disconnect the housing from strut.

Picture 10

__________________________________________________
FRONT AXLE INSTALLATION
INSTALLATION
1) Temporarily tighten the front axle to front strut.
2) Insert the front drive shaft into front axle.
3) Temporarily tighten the axle nut.
4) Install the transverse link ball joint to housing.
Tightening torque:
50 Nm (5.1 kgf-m, 37 ft. lbs.)
5) While aligning the alignment mark on the camber adjusting bolt head, tighten the housing and strut using a new self-locking nut.
Tightening torque:
175 Nm (17.8 kgf-m, 129 ft. lbs.)
6) Connect the tie-rod end ball joint to the knuckle arm with a castle nut.
Tightening torque:
27.0 Nm (2.75 kgf-m, 19.9 ft. lbs.)

CAUTION:
When connecting, do not hit the cap at bottom of tie-rod with hammer.

7) Tighten the castle nut to specified torque and tighten further within 60° until the pin hole is aligned with the slot in nut. Bend the cotter pin to lock.

Picture 11

8) Install the disc rotor on hub.
9) Install the disc brake caliper on housing.
Tightening torque:
Except STI model
80 Nm (8.2 kgf-m, 59 ft. lbs.)
STI model
155 Nm (15.8 kgf-m, 114.3 ft. lbs.)
10) Connect the stabilizer link.
Tightening torque:
Except STI model
30 Nm (3.1 kgf-m, 22 ft. lbs.)
STI model
45 Nm (4.6 kgf-m, 33 ft. lbs.)

CAUTION:
Use a new self-locking nut.
11) Using the ST1 and ST2, pull the front drive shaft into place.
ST1 922431000 AXLE SHAFT INSTALLER
ST2 927390000 ADAPTER

Picture 12

12) While depressing the brake pedal, tighten a new axle nut to specified torque and lock it securely.
Tightening torque:
220 Nm (22.4 kgf-m, 162 ft. lbs.)

CAUTION:
Do not over-tighten it as this may damage the wheel bearing.

Picture 13

13) After tightening the axle nut, lock it securely.
14) Install the ABS wheel speed sensor on housing.
Tightening torque:
33 Nm (3.4 kgf-m, 24 ft. lbs.)
15) Install the wheel and tighten the wheel nuts to specified torque.
Tightening torque:
90 Nm (9.1 kgf-m, 65.7 ft. lbs.)

_________________________________________

When you are working on the vehicle, confirm there isn't any excessive play in the ball joints or any of the steering components. A bad ball joint can also cause a clunk. Picture 8 shows the lower ball joint.

Let me know if this helps or if you have other questions.

Take care,
Joe
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Wednesday, March 20th, 2019 AT 8:09 PM
Tiny
BRYANDEARSTYNE
  • MEMBER
  • 4 POSTS
So the noise seems like it's coming from the rear end. I just did the driver side wheel bearing in the rear. The CV axle seem to be in really good shape. I'm getting ready to do the passenger side wheel bearing and had been looking at the CV axle and they both look like they're in decent shape. There's no play really at all.
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Wednesday, March 20th, 2019 AT 9:03 PM
Tiny
BRYANDEARSTYNE
  • MEMBER
  • 4 POSTS
And when I unplugged the all-wheel-drive fuse it had seemed to stop and then once in a while on tight corners it did it very lightly. You can hear it coming from be hind you. And you can almost feel in the car like gets held back that it go loss.
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Wednesday, March 20th, 2019 AT 9:05 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
If you hear it in the rear, inspect the CV axle joints on the rear and check universal joints going to the rear differential. Here is a link that shows how that is done:

https://www.2carpros.com/articles/how-u-joints-work

Also, make sure the differential fluid is full.

https://www.2carpros.com/articles/differential-gear-oil-fluid-check

Let me know what you find.
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Wednesday, March 20th, 2019 AT 9:28 PM

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