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2011subaru Outback automatic trans. makes clunking noise when turning L/R on start up.Doesnot make noise if going straight.Is transfrcase or differential defective?
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What kind of noise? A clunk, chatter, whir, grinding, or what? If it's a clunk, you may have a worn U-joint. Test by holding brake on and change between drive and reverse and back. If you hear a "clunk" when the tranny engages, it's probably a worn U-joint. Not a hard repair to do in the driveway. Always change BOTH front and rear U-joints - if one's worn, so's the other.
I assume youy have a "binding" sensation on tight, low speed turns. If your car is an automatic, the "Four wheel drive" solenoid will most likely need replacing. This is located at the back of the trans and does not require the entire trans to be removed for its replacement. In some circumstances, simply changing the trans fluid can remedy your issue, but more often than not, the solenoid will require changing. It would be advisable to change the fluid first, as it is not expensive to do and may help significantly. Hope this helps.
Turn off engine . get the vehicle on level ground. try to move driveshaft back an forth or,by rocking in twist motion,,, try to hear a knock,,,this would indicate a worn universal joint.either front or back, if you are good enough to discern which one is making the klunk, change both to be on the safe side. think they may be about 20 dol apiece.
This sounds like one or more of your motor/powerplant mounts is broken. Here is an easy test:
Have someone sit in the driver's sear with engine running and trans. in Park.
You stand in front with the hood open. Have them shift from Park to Reverse, and then Drive and back to Reverse and Park, taking time to stay in each gear and give some throttle while holding the brake pedal tight. This will rock or move the engine a certain amount as they shift through the gears and apply power lightly. It will move alot more violently with broken mounts.
If you have a clunking noise on Reverse shifts, you should be able reproduce this with the hood up and pinpoint the noise and/or sight the faulty motor mount with a friend's help. Good luck, I hope this puts you on the right track to fixing this annoying noise.
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