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17th December 2015, 15:31 | #1 |
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MG ZT 260 SE, ZS120, ZR105 Join Date: Mar 2014
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Noisy Diff
Anyone actually experienced a noisy 260 transmission? How do you determine you have a noisy diff, as opposed to the other possible causes of transmission noise?
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17th December 2015, 16:28 | #2 |
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Check ya tyres arnt distorted, move front to rear.if the noise is at 40mph its more likely a bearing on a wheel.
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17th December 2015, 17:33 | #3 |
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MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009
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Is the noise in all gears or a particular gear ?
The original diff oil was supposed to be changed after around 1,500mls if I remember correctly. I changed mine as soon as I got the car (when I carried out the service). |
17th December 2015, 17:40 | #4 |
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Clunking when taking power as long as it's not excessive is normal. It's worth changing the oil if you don't know when it was last done.
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17th December 2015, 18:00 | #5 |
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17th December 2015, 18:25 | #6 |
This is my second home
MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009
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17th December 2015, 18:36 | #7 |
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The oil change was early, I think it may even have been 1000 miles.
SJR |
17th December 2015, 18:39 | #8 |
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TADIS.
Changing Oil can help, A different gear change/clutch/throttle operation can also help. |
17th December 2015, 18:46 | #9 |
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Ok, thanks for quick replies, I can confirm tyres are new (it's a 260😀 and the diff oil has been changed. Wheel bearing would be a possibility, and it is virtually impossible to check them by hand due to the high diff resistance, but noise does not alter during cornering. Because the noise is purely speed related, and doesn't alter on power or over run, nor coasting in neutral, I would be inclined to think it might be the prop shaft centre bearing, but these cars did have a noisy diff issue, so how do you identify which is at fault?
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17th December 2015, 18:50 | #10 |
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Noisy RWD diffs usually make a hissing noise after a good few miles, mostly due to the "input" bearing.
Oil level is important for this bearing as they are splash lubricated, too low = inadequate lube.
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Cheers from Trevor MM0KJJ |
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