Rear diff and a pinion bearing will usually scream like a banshee. No mistaking that one.
Rear diff and a pinion bearing will usually scream like a banshee. No mistaking that one.
It is not he who gives abuse that affronts, but the view that we take of it as insulting; so that when one provokes you it is your own opinion which is provoking.<br /><br />–Epictetus
Yeah Steve - I thought of the diff and already pulled the cover off and checked it out. Pinion bearings and side bearings all good and no damaged teeth anywhere. I also pulled out the half shafts and checked the wheel bearings, all OK. I'm rapidly running out of ideas!
Cheers
Ian W.
Pulled my TC output shaft assembly to pieces for a better look and found that the bearings, although they felt smooth to turn, with no play, are definitely showing signs of old age. All taper rollers and both cups are pitted so new bearings and a seal are now on my bench ready for re-assembly. I just hope it is the answer to the vibration and noise. At least if it isn't I have eliminated the transfer case as the cause.
Ian W.
I rebuilt my transfer case with new bearings in the output shaft assembly last week and managed to find time to get it reinstalled. It hasn't cured the problem although the noise is a bit less than it was before. It still drives great apart from the noise and vibration on accelleration so I suppose I could just keep using it to see if it gets any worse. If I keep going until it fails at least I will find the problem! Then again I should probably drop the transmission out and have a proper look in the gearbox. I'll think about it over Christmas.
Hope you all have a good one.
Cheers
Ian W.
Finally got round to dropping my transmission tonight. Advantage of no roof and a folding windscreen - I used a chain block from the roof trusses in the garage and dropped it on the floor. plenty of clearance to pull it out the side. It's still a ton weight to struggle with on your own but "where there's a will there's a way". Hope to get a chance to pull it apart tomorrow to try and identify the cause of the chatter.
Cheers
Ian w.
Last edited by Flatfender; 24-08-15 at 05:32 PM.
Pulled the gearbox apart but still can't find any particular problem. I did replace a couple of bearings just to be on the safe side before I put it all back together and guess what - yeah - No difference. It is still noisy but only when accelererating, especially in top gear. It is starting to realy p!$$ me off. As I am in Sydney for a change on Club meeting night I will see if it will make it to Regents Park and back. Hope to see you all there.
Cheers
Ian W.
Had a chat with Pete, the Service Manager at Traction 4, Artarmon last week and he imediately said - Yeah that is the same noise we get all the time with hilux's. They are very succeptable to drive line vibration if the angles aren't exactly right. He reckoned my pinion to drive shaft angle was the problem, in spite of the fact that it was no problem for a few years. Thinking about it I remembered that my leaf springs have been sagging a bit lately so I jacked it up and put blocks under the bump stops to give it a 1" lift then tried it round the block. Straight off I found it was a lot better but still had a bit of noise and vibration. So in with blocks for 2" lift and hey presto - no noise and no vibration. I couldn't believe the difference especially after spending so much time and effort (let alone money) on replacement drive shaft, new transfer case bearings and new gearbox bearings, with no improvement at all.
So obviously I need to get my springs reset for a couple of inches of lift, but in the meantime as a temporary measure I put some packers between springs and axle to alter the angle and give the same result. It now drives beautifully.
That prompts the question - are tapered axle/spring shims available anywhere?
Cheers
Ian W.
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