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Intermittent grinding noise

Jake80

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Sep 17, 2021
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Hopefully they're out still enjoying their 80! Yeah it's a weird one, figured it was worth a shot; mechanic and I are stumped.
 

frank rabbets

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Similar noise turned out to be a bearing in the front stub axle. Not the wheel bearings but I think the central bronze one holding the wheel end of the shaft.
 

StarCruiser

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As Frank said. That’s what my money would be on. That’s a shaft ‘windmilling’ in an oversized hole.
It probably decelerates the truck too and shakes through the steering.
 

Jake80

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Thanks guys I think you're onto something. StarCruiser you're right - it does decelerate the truck slightly and vibrates the steering, the whole truck really. Hard to pinpoint the location of the noise but the more it happens I'm fairly certain it's a front wheel or diff area. Like Rob I thought mine happened mostly when coasting and is definitely triggered when either of the front wheels hits a bump. This morning was probably the worst it's been; it did it for a good 30 seconds or so but unlike Rob's it wouldn't go away when I throttled on, or braked. However the 30 second grind fest seems to have triggered the ABS light, which is new.
Will update with what we find next.
 

Grimbo

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If it is the bronze bushes upgrade to the needle roller bearings fitted in the 105 stub axles .....
 

Jake80

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So it took a while to get the cruiser booked in and finally sorted but you guys were on the money; stub axle brass bushes and stub axle washers have been replaced - also had swivel hubs rebuilt and back lash reset on the front diff while it was in. No more noise.
 
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frank rabbets

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Thanks for feedback on result. There are two videos on here with that noise, Best one really loud with LHD drivers window open.
 
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