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Grinding noise in ln106

Tech Talk for Cruiser owners.

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Posts: 324
Joined: Thu Aug 09, 2007 11:18 am
Location: Sydney

Grinding noise in ln106

Post by Evski »

Hey guys. I was driving along last night, took my foot of the gas and a wierd grinding noise came from the rear end of my Ln106 HiLux. The sound is hard to explain but is similar to a belt slipping, only not as high pitched. The diff has fresh oil in it so it should be fine. It only happened when I was off the gas and went away with my foot on the clutch so I doubt it is a wheel bearing. The only thing that I can think it would be is the uni joint. I had a quick look and there is a bit of free play in it (when turned side to side). Last week there was a noise, similar to a chain being dragged but went away after 100m and I have heard one or two clunks when doing tight turns in the last week. The sound was rotational, so it is on and off really quick. After maybe 5 minutes it want away again. Sorry for the long post, I am just trying to be as descriptive as possible. If it is the uni can I just pack it with grease (it's been a while ive been a bit slack lately) and keep on driving or will it need replacing.
Cheers guys. I was stinging to go for a night run tonight as well.
Resident Terrorist
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Post by RAY185 »

First thing I would suggest is to check the centre bearing on your tailshaft.
Posts: 324
Joined: Thu Aug 09, 2007 11:18 am
Location: Sydney

Post by Evski »

Cheers mate. Im a bit of a HiLux newbie. How can I check if that is the issue. Can I grease it up or will I need to replace it? There a pain in the arse to replace arent they? Will I be able to keep driving on it or is it important to change ASAP. Thanks guys, im in a bit of a pickle.
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Post by granborismo »

most likely a uni, i had the same problem. On gas it was fine, off gas squeeling its arse off, foot on clutch rolling went away again.
thought it was the centre bearing, replaced made no difference
then actually pulled the rear section of the tailshaft out to properly inspect, and yeah, was one of the unis on the diff end of the shaft. it only twisted one way properly.
i'd pull the shaft off the diff end first and check unis are moving freely and aren't notchy ,give them a grease, then maybe look into the bearing. as when the center bearing goes it usually makes noise all the time..
Posts: 324
Joined: Thu Aug 09, 2007 11:18 am
Location: Sydney

Post by Evski »

Awesome, thanks for that. I just bought a grease gun and some grease and im going to pack the S#@t out of it when I get home. As the noise has only happened twice in the last week im hoping the uni isnt to damaged. Can they come back from the dead or is the uni going to be ruined? I understand it is hard to know without seeing it, but the temptation to go wheeling is pretty strong. Dont know if I should just stay home :cry:
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Post by thehanko »

Evski wrote:Awesome, thanks for that. I just bought a grease gun and some grease and im going to pack the S#@t out of it when I get home. As the noise has only happened twice in the last week im hoping the uni isnt to damaged. Can they come back from the dead or is the uni going to be ruined? I understand it is hard to know without seeing it, but the temptation to go wheeling is pretty strong. Dont know if I should just stay home :cry:
scotts auto 1 sell unis for like $23, so its not too expensive if you have to change them.
*there's a rock, drive over it :) there's a bigger rock, drive over it :twisted: there's an even bigger rock, oops broke it :oops: Upgrade broken bit :bad-words:
Goto *
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Post by Evski »

Sweet. Where is this scotts place? I know Im going to have to change it, im just hoping I can get by for a little bit (night run). We all know you can never tell when something WILL let go, and usually it will happen at the worst time. Im just unsure about repairs to uni's, as in the 5 vehicles ive owned ive never had to do one. P.S. those shocks you sold me are nice and soft, my old tough dogs were way to stiff.
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Post by 5-Link_Lux »

I would also say the uni. Under load, the uni is "bound up" in one direction... for lack of another term. When you back off the uni is more able to move around in the cup, so if there is some free play in it, it will show up then.

Haven't explained it too well, but hope it makes some sense.

Brian
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Post by Evski »

Yeah mate, I get what your saying. Oh well looks like the place to start. Thanks for your input guys! What do you reckon though, would you risk it going 4wding. It will be greased up, but will this be enough? What are peoples experiences? Sorry to ask to these questions, it is the only way to learn.
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Joined: Thu Aug 09, 2007 11:18 am
Location: Sydney

Post by Evski »

Bugger it, I snuck out and bought a new uni. Is there a link, or does anyone have any tips for changing it. Im fine to remove the drive shaft, it's just everything from there ;)
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