Busted CV???

Submitted: Sunday, Feb 21, 2010 at 18:25
ThreadID: 76210 Views:2307 Replies:9 FollowUps:1
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I've never had a busted CV before and so I'm not quite sure what's going on?

I've got a real bad clicking noise from the front hub area of my '84 LN65 Lux. It seems to start clicking at around 40km/h.

I did a few tests. The first was to lock the hubs in but not be in 4wd. The clicking was there.
I put the ute in 4wd without the hubs locked in, there was some clicking, but nowhere near as much.

I locked the hubs in, put the ute in 4wd and drove around on right and left full lock, but didn't hear any clicking, it was very quiet.

From what I know about CV's, they always knock/rattle on full lock, but mine didn't.

The clicking seems to come easiest when driving in a straight line and when backing off the accelerator.

The clicking noise sounds similar to when a petrol motor 'pings' which sounds like your radiatior fan tapping your radiator.

I went out today with my son in the passenger seat and me driving and we both thought the sound was coming more from the middle of the vehicle rather than from either the left or right front wheel.

Any help will be greatly appreciated.
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Reply By: Ozhumvee - Sunday, Feb 21, 2010 at 18:45

Sunday, Feb 21, 2010 at 18:45
best way to play with it is to jack both front wheels put stands under it and then play around with an assistant holding the tailshaft to try and locate the noise, could be a crook tailshaft uni, wheel bearing etc.
when you are driving it everything tends to be under load making it hard to find the problem.
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Reply By: Member - MUZBRY(Vic) - Sunday, Feb 21, 2010 at 19:02

Sunday, Feb 21, 2010 at 19:02
Gday Siringo
I would be checking the uni joints first as you say the noise come from the centre.
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Reply By: Member - Shane D (QLD) - Sunday, Feb 21, 2010 at 19:54

Sunday, Feb 21, 2010 at 19:54
What about driving with the hubs unlocked in 2WD, you've made no mention of a result
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Reply By: Siringo - Sunday, Feb 21, 2010 at 20:41

Sunday, Feb 21, 2010 at 20:41
Thanks for the replies, greatly appreciated. Driving in normal 2wd is OK, no rattles or squeeks at all.

I read that it may be the cardan joint?????
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Reply By: B1B2 - Sunday, Feb 21, 2010 at 22:59

Sunday, Feb 21, 2010 at 22:59
G'day Siringo,
Have you checked there is enough grease in the CV joint. I don't know about your model, but a landcruiser has a removable plug where you can add grease, usually a molybenum type to withstand the sliding friction. it may be worth adding some to eliminate this possibility and see if it reduces the clicking noise.

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Reply By: Member - John (Vic) - Sunday, Feb 21, 2010 at 23:01

Sunday, Feb 21, 2010 at 23:01
Clicking normally equates to a stuffed CV.
Do as suggested and jack it up and eliminate all other possibilities.

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Reply By: Siringo - Monday, Feb 22, 2010 at 08:51

Monday, Feb 22, 2010 at 08:51
Thanks again for all the help. The CV's should be full of moly grease, I've refilled both sides twice.

The noise is more of a rattling sound rather than clicking, it sounds like wire sort of rattling around and knocking things. I'm going to try and get time to look at it today.

Thanks again.
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Follow Up By: Member - Timbo - Monday, Feb 22, 2010 at 12:26

Monday, Feb 22, 2010 at 12:26
Siringo, doesn't sound like a CV to me - usually they make more of a clunking sound rather than the pinging/rattling sound you describe.

Uni joints would be worth a look - usually you can grab the shaft with one had on either side of the joint and feel movement with your hand by the time they're bad enough to make a noise.

Another thing to check would be whether the shaft is bumping on any thing - I bumped one of my bash plates pushing it up towards the transfer case and it ended up getting bumped by the square end of the shaft (where it bolts to the transfer case output) when driving in 4WD under load - we found it by driving in lo-range with the brakes on while my brother watched underneath from outside the car (he could clearly see the bash plate moving with each 'rattle' sound).

Good luck chasing it down, I hope it's not too expensive for you...
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Reply By: Farmboywa - Monday, Feb 22, 2010 at 23:58

Monday, Feb 22, 2010 at 23:58
G'day Siringo, a blown exhaust manifold gasket will give off a tick or click noise. Happy Days. Farmboywa
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Reply By: Siringo - Monday, Mar 01, 2010 at 21:09

Monday, Mar 01, 2010 at 21:09
The problem is fixed!! It wasn't the CV's at all, the problem was with the cardan joint on the front tailshaft.

There must be a bung uni in the cardan joint, I just chased down a spare front shaft from a mate and put that in. Problem solved.
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