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Author: Subject: diff noise more in 4th?
legend

posted on 13/6/17 at 09:25 PM Reply With Quote
diff noise more in 4th?

running westfield with type9 box i know the diff is noisy and needs new crown and pinion but it seams loader in 4th gear is this normal?
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adithorp

posted on 14/6/17 at 06:14 AM Reply With Quote
Noisier at the same speed? Gear shouldn't make a difference to diff noise; Only speed or load.





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Sam_68

posted on 14/6/17 at 06:46 AM Reply With Quote
^^^ Broadly this.

But I suppose some sort of weird harmonic could be going on between the diff and the gearbox in 4th gear.

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Dingz

posted on 14/6/17 at 10:04 AM Reply With Quote
The gearbox will be quieter in 4th, perhaps thats why the diff sounds noisier.





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CNHSS1

posted on 14/6/17 at 10:17 AM Reply With Quote
With a rigidly mounted diff it could well be a gearbox issue more noticeable or allied to 4th gear, transmitting down prop and resonating at the diff. A spaceframe chassis does make a great sound box and the tiniest rattles can ring like a bell, but not necessarily where you look. I'd check engine mounting and gearbox mounting are tight and in good order too





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nick205

posted on 14/6/17 at 11:47 AM Reply With Quote
Has it got more noisy over time?

When I built an MK Indy the Sierra diff was rigidly mounted just behind my bum. I could hear it, but then in a Sierra is mounted in a rubber mounted sub-frame beneath the car so it's going to be quieter.

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