axle
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| posted on 16/11/16 at 08:41 AM |
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Sierra Noisy Diff
Hi all
Is this normal or I moaning? My differential is noisy above 30 MPH and after 50 mph I will not hear it because of wind. I am not sure if there is too
much ware or the fact that I am sitting really close to it hearing all the noise. Is there a remedy to this?
Regards Axle
IVA passed 1st time thanks to the Forum members.
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Barkalarr
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| posted on 16/11/16 at 08:50 AM |
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I had this on one of my cars... had the diff rebuilt with a new CW and PIN and made no difference.... You'll need to check any play in the drive
shafts and prop too.
Be careful, you're about to open a can of expensive worms !!
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axle
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| posted on 16/11/16 at 09:20 AM |
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Thanks for your reply you are right about rebuiding diff I have done this on a different built and made no difference. Is my only option a new one?
Regards Axle
IVA passed 1st time thanks to the Forum members.
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nick205
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| posted on 16/11/16 at 10:15 AM |
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The Sierra diff I put in my MK Indy wasn't silent. I took the view that being solid mounted and with me sat right next to it I'd hear any
slight noise from it. I covered some 3,000 miles before selling the car and neither I or the following owner had any issues with it. As above
they're not cheap things to rebuild so be careful what you start. A 2nd hand one could be a cheaper solution if there really were an issue.
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melly-g
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| posted on 16/11/16 at 10:36 AM |
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Mine has made a noise from day 1! 9 years on no louder I just make sure there's oil in it and don't worry about it.
If it goes pop i'll put another one in then.
[Edited on 16/11/16 by melly-g]
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axle
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| posted on 17/11/16 at 07:57 AM |
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Thank you all for the replies, shall do.
Regards Axle
IVA passed 1st time thanks to the Forum members.
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Chris_Xtreme
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| posted on 18/11/16 at 08:19 AM |
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I believe you can get some sort of diff quieting oil, I think there was some in my current quantum as the oil level was a but to full (from previous
owner) and came out a thicker black. I would say IIRC that it was a bit quieter when it was in.
could be worth a try for you. I'd agree with all the above, I've done edging on 20k miles in my 3 kit cars and over time and I'd
also agree that nothing has changed with the noise, so I doubt there is a problem with it.
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nick205
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| posted on 18/11/16 at 08:52 AM |
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With a diff keep in mind that they're usually mounted outside the vehicle body using rubber mounts to dampen noise and vibration. Certainly in
my Indy the diff was solid mounted adjacent to my left bum cheek so you're bound to hear more noise from it.
I'd really be tempted to check for any play in the driveshafts, but otherwise live with it and see if it gets any worse over time/miles. One
other thing to check would be the oil level - it's not impossible for it to have been low or have lost some oil. Not sure what the
drain/refill/check procedure is, but a Sierra Haynes manual should have that detail for you.
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