Single dull knock sound when accelerating during driving.

[Matheuszh]

You'd think they checked... but differential mounts? they could look fine and feel fine by hand... but with the torque , it's enough to thud/clunk after it settles in to a neutral position ? which is why you wouldn't hear it if they were already in the "stressed" position and once there you could accelerate hard and not clunk since it's not moving more... i've read they are pretty soft bushings... I had a similar on first accel/ decel thunk in our e39 wagon which was the rear diff bushings..

Very interesting, I need to find if they changed or replaced them them during diff replacement.
I have a gut feeling this actually might be the problem. I am not getting any vibrations but if they are soft, maybe thats why.

Do you need to remove entire diff to access them?

Also when im accelerating REALLY slowly, it doesnt happen or if so, very quietly, just informing

 

[Matheuszh]

something loose rolling around under the seat or trunk? its usually my sons roblox figurines or a water bottle.

100% sure its not the case because it happens before acceleration. Ive removed everything from trunk and under it, also no spare tires and i can feel the thud in gas pedal sometimes.

 

[Slip_Angle]

100% sure its not the case because it happens before acceleration. Ive removed everything from trunk and under it, also no spare tires and i can feel the thud in gas pedal sometimes.

Figure this out?

 

[Clearly Canadian]

I had a similar issue. Car has been in the shop for almost two months now. Under warranty.

 

[D.J.]

I had a similar issue. Car has been in the shop for almost two months now. Under warranty.

did they give you a loaner?

 

[Clearly Canadian]

did they give you a loaner?

Yup

 

[D.J.]

Yup

That's crazy that it is taking so long.

Do they have a suspected part? Did they determine it was unsafe and had to keep it?

I can't imagine anything taking that long.

 

[Clearly Canadian]

That's crazy that it is taking so long.

Do they have a suspected part? Did they determine it was unsafe and had to keep it?

I can't imagine anything taking that long.

Been in a loop. Diagnose--warranty claim--ship part--install.
First the front differential, then the transfer case, now the transmission.

 

[Clearly Canadian]

My thread on this issue is here:

Ticking/tapping sound under low acceleration

Hi there, my stinger has developed a ticking or tapping sound coming from the driver wheel area when accelerating slowly. It's quite noticeable. Has anyone come across something like this before?

stingerforum.org

 

[Matheuszh]

Been in a loop. Diagnose--warranty claim--ship part--install.
First the front differential, then the transfer case, now the transmission.

I hope they will figure it out soon.

In my case the difference is that I have a one single knock sound coming more from back area.

I havent been in Kia yet to check the diff mounts. It doesnt seem to get worse. I will update soon when Ill hit 110k km or 120k km