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Rear vibration diagnose

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03 Jul 2020 19:07 #224457 by Wailin
My 2002 Jimny has developed a constant hum/vibration that can be felt/heard and appears to be coming from the rear axle. I'm hoping it's just a wheel bearing but am starting to think it may be something a bit more costly. I have jacked up the rear and checked both wheels for play in the 3 o clock and 6 o clock positions but all fine. Spinning them there is a low noise but I can't say if it's the excessive vibration I feel when driving. I put it into gear while jacked up and can hear the noise getting louder but I'm not sure if its coming from the diff or the wheels, its hard to pinpoint. Is there anyway I can eliminate a bearing issue for certain, without going through the hassle of changing them? Any suggestions on how to diagnose what's causing the noise/vibration would be helpful.

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03 Jul 2020 19:53 - 03 Jul 2020 19:55 #224459 by HUN
Replied by HUN on topic Rear vibration diagnose
Put the gearbox in 2nd gear whilst it's on jack stands then go behind the car. Use a long screwdriver as seen on the picture to locate the source of noise.

Obviously check the differential and the end of axle housing not the engine! :laugh:

TrailMaster 2" lift kit
JB rear disk brake conversion, all guards, recovery points & battery tray
ORE transfer box HD brackets
T-Max split charge system
X-Shock Dakar ceramic clutch kit & roof rack
Flo-Flex castor polybushes
Kumho KL71 tyres
AVM hubs
ORA radius arm guards
Push-fit breathers
Attachments:
Last edit: 03 Jul 2020 19:55 by HUN.

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03 Jul 2020 20:09 #224460 by Wailin
Replied by Wailin on topic Rear vibration diagnose
Thanks, I will give that a try. If the vibration is from the diff, what would be the most common cause?

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03 Jul 2020 20:21 #224461 by HUN
Replied by HUN on topic Rear vibration diagnose
I guess pinion gears, side gears or poor contact between teeth surfaces due to worn gears?
Perhaps more experienced forum members should be able to advise properly.

TrailMaster 2" lift kit
JB rear disk brake conversion, all guards, recovery points & battery tray
ORE transfer box HD brackets
T-Max split charge system
X-Shock Dakar ceramic clutch kit & roof rack
Flo-Flex castor polybushes
Kumho KL71 tyres
AVM hubs
ORA radius arm guards
Push-fit breathers

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06 Jul 2020 22:16 #224609 by Wailin
Replied by Wailin on topic Rear vibration diagnose
Noise appears to be coming from rear diff alright. I changed the oil just to see if there's any pieces of metal and there was. Not good. I think a new (used) diff is needed. Is it easier to just replace the entire rear axle or just do the diff?

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06 Jul 2020 22:37 #224610 by HUN
Replied by HUN on topic Rear vibration diagnose
Replace just the differential. It's also cheaper than the whole unit.

TrailMaster 2" lift kit
JB rear disk brake conversion, all guards, recovery points & battery tray
ORE transfer box HD brackets
T-Max split charge system
X-Shock Dakar ceramic clutch kit & roof rack
Flo-Flex castor polybushes
Kumho KL71 tyres
AVM hubs
ORA radius arm guards
Push-fit breathers

Please Log in or Create an account to join the conversation.

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