Howling diff

1173 Views 4 Replies 3 Participants Last post by cgravenor64, 7 mo ago

anthony2.5tm3

Discussion Starter · 7 mo ago

Hey guys owner of a 2021 turbo 3 already had the diff replaced noise still came back almost immediately new diff currently has around 6000kms on it, does anyone else have any ideas what could cause the noise. Possibly the driveshaft, wheel bearing I don't feel is possible as it only happens from 119-129km/h. The whine/howl gets louder on acceleration. Makes me nervous to drive honestly as I always worry about it just breaking. Dealer was helpful at first but not much anymore at a lost of what to do I love the other just wish this could get fixed.

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zero_gravity

· #2 · 7 mo ago

definitely from the rear end? your suggestions are all possible for sure. even tires can sometimes do that... does the howl stop or lessen if you take your foot off the gas? does braking have any effect?

wheel bearing is an easy check, lift rear end and rock the tires by hand. just make sure parking brake is off.

what your dealer should be doing is putting it on a hoist. one person runs it, the other pokes around with a stethoscope. even finding nothing tell us something.

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anthony2.5tm3

Discussion Starter · #3 · 7 mo ago

zero_gravity said:
definitely from the rear end? your suggestions are all possible for sure. even tires can sometimes do that... does the howl stop or lessen if you take your foot off the gas? does braking have any effect?

wheel bearing is an easy check, lift rear end and rock the tires by hand. just make sure parking brake is off.

what your dealer should be doing is putting it on a hoist. one person runs it, the other pokes around with a stethoscope. even finding nothing tell us something.

It still makes noise when I let off the gas but it becomes quieter versus if I apply load it gets louder. The seats block out a lot of noise but if the seats are down I can hear it a lot more. If doesn’t sound like it comes from the transition but maybe it does

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zero_gravity

· #4 · 7 mo ago

That sounds like a bearing to me. Need to get it on a hoist and find the failure with a stethoscope.

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cgravenor64

· #5 · 7 mo ago

anthony2.5tm3 said:
Hey guys owner of a 2021 turbo 3 already had the diff replaced noise still came back almost immediately new diff currently has around 6000kms on it, does anyone else have any ideas what could cause the noise. Possibly the driveshaft, wheel bearing I don't feel is possible as it only happens from 119-129km/h. The whine/howl gets louder on acceleration. Makes me nervous to drive honestly as I always worry about it just breaking. Dealer was helpful at first but not much anymore at a lost of what to do I love the other just wish this could get fixed.

Rear ends are known for failing, mine went at 5K, and others have said they have had multiple diffs fitted, my mazda 3 had so many issues it was bought back under California lemon law, I got a Cx-30 same platform, it was bought back too. Now I drive a Toyota, so happy

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