TheRecklessEngineer Posted November 4, 2007 Share Posted November 4, 2007 Had a very irritating noise on my disco for ages now (years). Had enough of it, so spent the day trying to find out what it was. I'm still stumped... It seems to be engine RPM related, but only under load (i.e accelerating or going up a slight incline)...most annoyingly, at 30mph in 5th. I can also find it in 4th and 3rd, but not so much in 1st or 2nd. It isn't present when heavily loaded. It was present before and after a 2" lift, gas shocks and polybushes all round were fitted. Using a camera strapped underneath, managed to work out it was somewhere up front - all hell breaks loose when I strap the camera to the axle, and seems to be passenger side Anyone had anything like this? Here are the videos anyway...what does the panel think? Quote Link to comment Share on other sites More sharing options...
Les Henson Posted November 4, 2007 Share Posted November 4, 2007 Spigot bearing, clutch, starter motor not disengaging? Les. Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted November 4, 2007 Author Share Posted November 4, 2007 No, definitely coming from the front axle area - and just discovered it isn't present with diff-lock in (and neither is a clack when I pull away which I always assumed was the brake pads, but maybe a diff related thing that was discussed on here not long ago...) Quote Link to comment Share on other sites More sharing options...
white90 Posted November 4, 2007 Share Posted November 4, 2007 is there a lot of freeplay in take up of drive on the front axle? if so poss crown wheel bolts loose? or broken/chipped teeth Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted November 4, 2007 Author Share Posted November 4, 2007 There is some free-play yes....but nothing more than I would normally expect from a landy. The front axle needs to come apart soon, and I need to replace a UJ on the front propshaft, so ill check it out then. Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted November 4, 2007 Author Share Posted November 4, 2007 I probably ought to add that it isn't a continuous noise...it is a resonant noise, so only at certain engine RPM. It rises from a vibration to a loud 'rasping'... Quote Link to comment Share on other sites More sharing options...
Les Henson Posted November 4, 2007 Share Posted November 4, 2007 Does it do it only when driving, or can you 'find it' with just the accelerator pedal? Les. Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted November 4, 2007 Author Share Posted November 4, 2007 Only when driving... Quote Link to comment Share on other sites More sharing options...
Ryan Posted November 4, 2007 Share Posted November 4, 2007 Sounds exactly like what I've got. Mine's a 300 tdi. It's hard to tell from the vid, but is a deep rumbly sort of vibration? Almost like you've picked 4th when you should've picked 2nd? I've narrowed it down to one of two things - it's either because I removed the harmonic damper when I fitted a QT front diff guard, or it's the Southdown steering guard vibrating - or I suppose it could be both... Quote Link to comment Share on other sites More sharing options...
disco tony Posted November 4, 2007 Share Posted November 4, 2007 May sound pretty dumb but wasn't the bottom end of that shocker giving it "large" resinance in keeping with the humming? Quote Link to comment Share on other sites More sharing options...
gruntus Posted November 4, 2007 Share Posted November 4, 2007 Hi James, I had something similar on my Disco a while ago (speed and RPM in a particular gear), it was the front UJ in my case and it would go away if you gave it a spray with WD40 (please don't berate me for it. It was the quickest way to diagnose the problem). It was knackered and greasing it would only cure it for a short while then return. I replaced the prop shaft in the end due to the amount of wear and the problem went away. May be worth a quick squirt? Sorry if doesn't help. Cheers G Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted December 1, 2007 Author Share Posted December 1, 2007 Hmmm...the mystery deepens.... I removed the front prop shaft last night, due to a duff UJ, and driving around with diff-lock in on the rear only results in no dodgy noises whatsoever! Front prop at fault? Or can using one prop only affect the dynamics of a vehicle? Quote Link to comment Share on other sites More sharing options...
paintman Posted December 1, 2007 Share Posted December 1, 2007 If you read the post before yours you will note that the poster claims the same prob was caused on his by a duff propshaft UJ. In your post you say the front prop is now off due to a duff UJ & the noise has stopped........ You say the mystery deepens????? How about trying a propshaft with good UJ's - even new ones on yours Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted December 1, 2007 Author Share Posted December 1, 2007 Hmmm...yeah, I think ive answered my own post really.... Quote Link to comment Share on other sites More sharing options...
Projectblue Posted December 1, 2007 Share Posted December 1, 2007 Hi James,I had something similar on my Disco a while ago (speed and RPM in a particular gear), it was the front UJ in my case and it would go away if you gave it a spray with WD40 (please don't berate me for it. It was the quickest way to diagnose the problem). It was knackered and greasing it would only cure it for a short while then return. I replaced the prop shaft in the end due to the amount of wear and the problem went away. May be worth a quick squirt? Sorry if doesn't help. Cheers G I was going to say front prop - either UJ or I had a problem on mine which was the output bearing in the transferbox to the front prop. Incidentally, how did you manage to hang on underneath while someone else drove? You a stuntman for a living? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.