cornwalltocapetown
New Member
Dear All,
My 1992 Defender 110 200 TDi has decided to develop a nasty grinding sound in Bristol, which is a while away from Cornwall, where I live. Cue epic recovery mission.
Character: horrible grinding, sounds as if two gears are stripping each other/metal rotating against metal. When present, sound comes in waves approx 2/sec, as if it were incurred by rotation.
Onset: over 4 hours continuous driving the M4 50-60mph two days ago. Only driven a few hundred yards since to check if fixed.
Location: Center-forwards from what I can tell, ? from gearbox/transmission area. I'm by myself though so hard to work out.
Present: any speed over 5mph
Proportional to: road speed, I think, in that it's present at speeds >5mph, with the frequency of 'waves' increasing with road speed.
Seemingly NOT affected by: engine speed, acceleration, braking, coasting (with both gearbox and transfer box in neutral), gear selection (gearbox), range selection (transfer box), diff lock selection, steering.
Based on the above, I thought it might be something distal to transfer box, i.e. problem with drive train/diffs/wheel barings/brakes
History/My work so far:
Rear prop: original, new UJs 1 month ago, greased, no play
Salisbury Diff: good level of EP90, no idea when last changed (on the to-do list!)
Front prop: new prop replaced 4 months ago with new UJs, greased, no play
Front diff: good level of EP90, no idea when last changed. I have drained this today, no metal shavings/indication of failure.
Front swivels: left a bit dry (topped up), right ok.
Wheel barings: no play on all 4 wheels when jacked up individually.
Left front disc brake: dandy
Right front disc: unhappy calipers, old problem, I don't think it's got worse, wheel spins fairly easily by hand
Just in case I am wrong:
LT77s gearbox: good level of lubricant, no idea when last changed
LT230t transfer box: lubricant a bit low with a bit of froth on the top, no idea when last changed, took 160mls to top up
Exhaust: secured, no rattles.
Bonnet support: secure
I'm stumped. Quite concerned it's something nasty in transfer box/gearbox, or a layshaft/mainshaft problem (which I would know nothing about), or ?? a wheel baring
Your thoughts much appreciated.
Cheers!
Rich
My 1992 Defender 110 200 TDi has decided to develop a nasty grinding sound in Bristol, which is a while away from Cornwall, where I live. Cue epic recovery mission.
Character: horrible grinding, sounds as if two gears are stripping each other/metal rotating against metal. When present, sound comes in waves approx 2/sec, as if it were incurred by rotation.
Onset: over 4 hours continuous driving the M4 50-60mph two days ago. Only driven a few hundred yards since to check if fixed.
Location: Center-forwards from what I can tell, ? from gearbox/transmission area. I'm by myself though so hard to work out.
Present: any speed over 5mph
Proportional to: road speed, I think, in that it's present at speeds >5mph, with the frequency of 'waves' increasing with road speed.
Seemingly NOT affected by: engine speed, acceleration, braking, coasting (with both gearbox and transfer box in neutral), gear selection (gearbox), range selection (transfer box), diff lock selection, steering.
Based on the above, I thought it might be something distal to transfer box, i.e. problem with drive train/diffs/wheel barings/brakes
History/My work so far:
Rear prop: original, new UJs 1 month ago, greased, no play
Salisbury Diff: good level of EP90, no idea when last changed (on the to-do list!)
Front prop: new prop replaced 4 months ago with new UJs, greased, no play
Front diff: good level of EP90, no idea when last changed. I have drained this today, no metal shavings/indication of failure.
Front swivels: left a bit dry (topped up), right ok.
Wheel barings: no play on all 4 wheels when jacked up individually.
Left front disc brake: dandy
Right front disc: unhappy calipers, old problem, I don't think it's got worse, wheel spins fairly easily by hand
Just in case I am wrong:
LT77s gearbox: good level of lubricant, no idea when last changed
LT230t transfer box: lubricant a bit low with a bit of froth on the top, no idea when last changed, took 160mls to top up
Exhaust: secured, no rattles.
Bonnet support: secure
I'm stumped. Quite concerned it's something nasty in transfer box/gearbox, or a layshaft/mainshaft problem (which I would know nothing about), or ?? a wheel baring
Your thoughts much appreciated.
Cheers!
Rich