Driveline whir and whump problem...
'96 XJ 4.0 4wd here, and what I've been observing for at least the last year is a sort of whirr/whump sound exactly once every wheel rotation, that seems like it could be coming from any direction. At first I thought it was a broken tire band, so I replaced each tire in succession with my spare to see which one it was only to determine it's not any of them. The sound persisted.
Next, since my front axle u-joints were looking bad I thought it might be them. Got some new ones in and the sounds still there. Last, on a whim, I replaced both my front hubs. Sounds still there. Now for the first time, what I noticed this week on really smooth road, is that at slow speed you get a slight up and down sensation in the seat in conjunction with the sound. Now all of this is beyond me, but hopefully there's enough info. here for someone to make a decent guess. I'm all ears. Thanks. |
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