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2006 Subaru Outback 2.5i with 2 inch lift and 235/75/15 Falken Wildpeaks AT3W
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12 Posts
Discussion Starter · #1 ·
Hello,

Sometimes when I accelerate from 0-20 and let off the accelerator my 2006 outback 2.5i automatic will make a series of 3 popping and clunking noises coming from the middle and rear end of the car. The noise is loud enough to where I am able to hear it clearly in the cabin and also feel it. I checked the rear axles and they seem fine. My only guess would be either the driveshaft or the diff. its also worth mentioning that the front passenger side has a reman axle on it and there is slight vibration during low speed (0-20) acceleration. the axle is a cardone axle. Any one else have this issue?
 

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Premium Member
(formerly) 03 H6 OBW , (presently) 06 WRX Sportwagon & 2021 Honda CR-V
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18,582 Posts
check rear bushings in the front lower control arm.

check rear diff mount bushings too.
 

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2005 OBXT Ltd Obsidian Black 5MT
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1,080 Posts
Make sure the heat shield that is above the catalytic converter, but below the driveshaft, isn't hitting the driveshaft. I had a sound that would only occur during takeoff and I traced it back to the heat shield hitting the driveshaft.

I had apparently hit a snow bank and bent it just enough to where it hit only when the car accelerated. I pulled the heat shield out, no more sound.
 

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Registered
2005 OBXT Ltd Obsidian Black 5MT
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1,080 Posts
But, yes, also check the bushings. Popping is more likely the bushings. The clunk and kind of grind was the heat shield.
 

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Master Caster
🖤💔💙 3 Beautiful OBXTs
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16,263 Posts
Check your transmission mount and the rear differntial bushings. They are both a hollow design that can start to fail or tear away from the metal they are bonded to.
 
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