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#4484796 - 08/10/17 02:12 PM '11 Sportage transmission "scrubbing" noise
Alex_V Offline


Registered: 04/10/16
Posts: 1155
Loc: Campbellsville, KY
A customer asked me about a noise his '11 Sportage (2.4L/auto, 175K) is making, and after a test drive and a little poking around with it in the air it appears to be in the transmission. Becoming audible from inside the car above about 15 MPH, the only time the noise doesn't occur is when there's absolute slack in the drivetrain - even when slowing down it's there, but slightly quieter than when sustaining speed or accelerating. It's not a whir or whine, like a wheel bearing, and not a defined bang or pop - more like an oscillating scrubbing sound that has a rhythm to it, directly related to ground speed; however, it's not related to wheel speed because when I had it in the air, idling in drive (speedo was reading around 20) and rubbed a board on one tire slowing one wheel the noise didn't change in relation to that, only with the difference in engine speed. Which makes me think it's in the final drive portion of the transmission. But after some googling I don't see any mention of a similar, common problem with these vehicles.

Thoughts? I'm inclined to recommend against any maintenance to try to "save" the transmission, because new fluid ain't gonna help worn or banged up final drive gears, and just drive it 'til it gets worse or fails then rebuild/replace.
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#4484829 - 08/10/17 02:41 PM Re: '11 Sportage transmission "scrubbing" noise [Re: Alex_V]
SatinSilver Offline


Registered: 01/24/08
Posts: 10172
Loc: OH
Does it have an atf dipstick, and if so what color is the fluid? Hopefully it's been changed a few times over the 175k miles. Prob needs a new trans would be my guess. It would be nice to drop the pan and change the filter. No flushes. Funny/weird trans issues have been solved with a simple drain and fill. It's worth doing a little maintenance to see if an issue goes away. Esp ones that cost less than $100. Napa prob has a decent filter in stock. If that doesn't solve it I'd stop there and not continue doing maintenance type stuff to it.


Edited by SatinSilver (08/10/17 02:43 PM)

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#4484835 - 08/10/17 02:50 PM Re: '11 Sportage transmission "scrubbing" noise [Re: SatinSilver]
JustN89 Online   content


Registered: 06/27/17
Posts: 472
Loc: DFW
Originally Posted By: SatinSilver
Does it have an atf dipstick, and if so what color is the fluid? Hopefully it's been changed a few times over the 175k miles. Prob needs a new trans would be my guess. It would be nice to drop the pan and change the filter. No flushes. Funny/weird trans issues have been solved with a simple drain and fill. It's worth doing a little maintenance to see if an issue goes away. Esp ones that cost less than $100. Napa prob has a decent filter in stock. If that doesn't solve it I'd stop there and not continue doing maintenance type stuff to it.

Pretty sure that is a sealed unit with an internal filter. I'd still do a drain and fill on it though. Not terribly difficult and Kia ATF is pretty cheap.

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#4484846 - 08/10/17 03:11 PM Re: '11 Sportage transmission "scrubbing" noise [Re: Alex_V]
KGMtech Offline


Registered: 10/17/14
Posts: 967
Loc: SW Ontario Canada
Are the bolts holding the flex plate tight to the TC? I saw this issue on YT - it was a Korean car IIRC.
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#4485145 - 08/10/17 08:51 PM Re: '11 Sportage transmission "scrubbing" noise [Re: KGMtech]
andyd Online   content


Registered: 09/25/04
Posts: 7154
Loc: Marshfield , MA
Originally Posted By: KGMtech
Are the bolts holding the flex plate tight to the TC? I saw this issue on YT - it was a Korean car IIRC.
Complete wild guess. Maybe a cracked flex plate?
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#4485191 - 08/10/17 09:46 PM Re: '11 Sportage transmission "scrubbing" noise [Re: Alex_V]
Nick1994 Online   content


Registered: 02/19/13
Posts: 10117
Loc: Phoenix, AZ
I'd put the front up on jack stands, turn off traction control, and have someone "drive" it and crawl underneath and listen.
_________________________
2015 Hyundai Sonata 2.4L 79k PU 5w30 & OEM
2000 Toyota Camry 2.2L 228k M1 AFE 0w30 & Wix
1996 Jeep Cherokee 4.0L 146k M1 HM 10w40 & Fram Ultra

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#4485195 - 08/10/17 09:58 PM Re: '11 Sportage transmission "scrubbing" noise [Re: Alex_V]
HangFire Offline


Registered: 08/21/13
Posts: 2506
Loc: Central Maryland
Originally Posted By: Alex_V
It's not a whir or whine, like a wheel bearing, and not a defined bang or pop - more like an oscillating scrubbing sound that has a rhythm to it, directly related to ground speed; however, it's not related to wheel speed because when I had it in the air, idling in drive (speedo was reading around 20)

Originally Posted By: Nick1994
I'd put the front up on jack stands, turn off traction control, and have someone "drive" it and crawl underneath and listen.
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#4485212 - 08/10/17 10:27 PM Re: '11 Sportage transmission "scrubbing" noise [Re: HangFire]
Nick1994 Online   content


Registered: 02/19/13
Posts: 10117
Loc: Phoenix, AZ
Originally Posted By: HangFire
Originally Posted By: Alex_V
It's not a whir or whine, like a wheel bearing, and not a defined bang or pop - more like an oscillating scrubbing sound that has a rhythm to it, directly related to ground speed; however, it's not related to wheel speed because when I had it in the air, idling in drive (speedo was reading around 20)

Originally Posted By: Nick1994
I'd put the front up on jack stands, turn off traction control, and have someone "drive" it and crawl underneath and listen.
duh I'm an idiot
_________________________
2015 Hyundai Sonata 2.4L 79k PU 5w30 & OEM
2000 Toyota Camry 2.2L 228k M1 AFE 0w30 & Wix
1996 Jeep Cherokee 4.0L 146k M1 HM 10w40 & Fram Ultra

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#4485350 - 08/11/17 06:06 AM Re: '11 Sportage transmission "scrubbing" noise [Re: Alex_V]
Alex_V Offline


Registered: 04/10/16
Posts: 1155
Loc: Campbellsville, KY
I ruled out something on the engine side of the transmission because the frequency of the noise corresponds to ground speed, not engine speed - but not to the speed of one wheel or another, which would indicate it's in the final drive before the spider gears/axle shafts.

I believe this unit is intended to be non-serviceable, but I'll see what a drain/fill would cost.
_________________________
I like Chevy and Valvoline.

'13 Cruze, 1.4T, 112K
'85 GMC C3500, 454, 130K
'82 Mercedes 300CD, OM617 turbo, 167K
'67 Suburban, 350, 331K

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#4485382 - 08/11/17 07:07 AM Re: '11 Sportage transmission "scrubbing" noise [Re: Alex_V]
JustN89 Online   content


Registered: 06/27/17
Posts: 472
Loc: DFW
Originally Posted By: Alex_V
I ruled out something on the engine side of the transmission because the frequency of the noise corresponds to ground speed, not engine speed - but not to the speed of one wheel or another, which would indicate it's in the final drive before the spider gears/axle shafts.

I believe this unit is intended to be non-serviceable, but I'll see what a drain/fill would cost.

Dealer averages seem to be in the $150 range (at least near my location, YMMV). Indie shops seem to be around the $85-100 range. Or you can do it yourself:

1) Remove undercarriage panel

2) Remove fill plug (do this first- you don't want to drain fluid and find that you cannot remove fill plug)

3) Drain fluid through drain plug (I believe it requires a 24mm socket, or your 3/8" socket wrench will fit perfectly inside without an attachment)

4) Reinstall drain plug and remove level check plug

5) With a catch pan underneath, fill transmission with ATF using a long funnel (preferably a 12" funnel). When transmission level is correct, a thin stream will come out of level check hole.

6) Start car and let it idle for about 15 minutes. Once done, shift through gears.

7) Add fluid until a thin stream comes out of level check plug.

8) Reinstall level check plug and fill plug.

Note: The car must be level in order to get accurate level checks.

There are also plenty of youtube videos out there covering this that will give better step by step directions than I have. It's pretty straight forward though. Once you get the hang of it, it goes pretty quick and now you can perform another bit of preventative maintenance on your vehicle.

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#4485383 - 08/11/17 07:09 AM Re: '11 Sportage transmission "scrubbing" noise [Re: JustN89]
JustN89 Online   content


Registered: 06/27/17
Posts: 472
Loc: DFW
Originally Posted By: Alex_V
I ruled out something on the engine side of the transmission because the frequency of the noise corresponds to ground speed, not engine speed - but not to the speed of one wheel or another, which would indicate it's in the final drive before the spider gears/axle shafts.

I believe this unit is intended to be non-serviceable, but I'll see what a drain/fill would cost.


Dealer averages seem to be in the $150 range (at least near my location, YMMV). Indie shops seem to be around the $85-100 range. Or you can do it yourself:

1) Remove undercarriage panel

2) Remove fill plug. Do this first- you don't want to drain fluid and find that you cannot remove fill plug. (I believe this is a 22mm socket, but a 3/8" extension will fit in the center of the plug)

3) Drain fluid through drain plug. (I believe it requires a 24mm socket, or your 3/8" socket wrench will fit perfectly inside without an attachment)

4) Reinstall drain plug and remove level check plug

5) With a catch pan underneath, fill transmission with ATF using a long funnel (preferably a 12" funnel). When transmission level is correct, a thin stream will come out of level check hole.

6) Start car and let it idle for about 15 minutes. Once done, shift through gears.

7) Add fluid until a thin stream comes out of level check plug.

8) Reinstall level check plug and fill plug.

Note: The car must be level in order to get accurate level checks.

There are also plenty of youtube videos out there covering this that will give better step by step directions than I have. Also important, the fill plug is plastic so don't over-torque it. It's pretty straight forward though. Once you get the hang of it, it goes pretty quick and now you can perform another bit of preventative maintenance on your vehicle.

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#4485744 - 08/11/17 01:26 PM Re: '11 Sportage transmission "scrubbing" noise [Re: Alex_V]
Alex_V Offline


Registered: 04/10/16
Posts: 1155
Loc: Campbellsville, KY
I would be doing it myself... because I'm the mechanic.
_________________________
I like Chevy and Valvoline.

'13 Cruze, 1.4T, 112K
'85 GMC C3500, 454, 130K
'82 Mercedes 300CD, OM617 turbo, 167K
'67 Suburban, 350, 331K

Top