Vehicle & Technical > Discovery
Whats that whining?
Dirty Gertie:
With any whining noise coming from the drivetrain, I'd always suspect UJ's first!! Easy to check, cheap n simple to replace!
muddyweb:
UJ's are well worth checking, but they don't usually manifest as a whining... more often as vibration or squeaking.
Failed bearings should have been caught in the MOT (but I didn't know it was happening when you had a test ;-)) Still well worth checking though
lrmike:
If the whine is there on acceleration, but goes away when you let off you may have an issue with the pinion bearings in the diff or the ring and pinion gears, maybe from lack of oil or contamination (water). Had it on disco's before..
Range Rover Blues:
If it's coming from underneath, on acceleration and consistent with road speed rather than engin espeed I'll say it's the diff. Drop the oil and refill, if it keeps doing it it keeps doing it, they get progressively worse 'till you decide to replace it.
If it's an engine speed related whine I'd say turbo. Check that it hasn't got oil contaminated recently as this makes them less efficient and therefore noisey. Have you had any work done recently on the inlet side? intercooler cleaned anything like that?
Mace:
Try travelling at speed, dip the clutch, let the revs drop,see if the noise goes away.
Then throttle back up to the revs you were at before you dipped the clutch (keeping the clutch depressed), listen again.
Decide at what point it's making the noise.
This will tell you whether it's engine related or load related.
I've had a whine for ages which only appeared under load. Sounded just like a diff whine from the front. It was wheel bearing related but I ended up replacing the stub-axle and inner bearings too. Whine's now gone.
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