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Non-death wobble vibrations at speed.

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07 Apr 2025 07:13 #260049 by Sheepish
2005 Jimny with 75,000 miles. Getting some major vibration above 50mph when I'm on the throttle. Lift the throttle and the vibration stops. It affects the whole car, but the steering is fine, so I'm ruling out front wheels / hubs / king pins. I did change the rear engine/ gearbox mount a couple of months ago which slightly improved some difficult gear changes. If anything it feels like it's coming from front passenger side. Any thoughts on what to look at? 

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07 Apr 2025 07:49 - 07 Apr 2025 07:49 #260051 by yakuza
Was the driveshafts out when doing the gearbox mount?
they could have been put together at the wrong spline so the U-joints don't align correctly?

Norway 2005 Jimny M16A VVT, 235 BFG MT, 2" Trailmaster, ARB rear lck, 17%/87% high/low gears.
Last edit: 07 Apr 2025 07:49 by yakuza.

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07 Apr 2025 09:25 - 07 Apr 2025 09:26 #260056 by Sheepish
No. Just jacked up the gearbox and unbolted the mount. The vibration was there before I changed the mount, just the mount change didn't help it. I can see I wasn't very clear about that initially.
Last edit: 07 Apr 2025 09:26 by Sheepish.

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07 Apr 2025 09:57 #260057 by Motacilla
Bad universal joint, would be my guess. That is why it happens only on-throttle, when the torque loads the bearing surfaces in the joint.
The following user(s) said Thank You: Sheepish

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