60 Series making strange sounds

Submitted: Monday, May 18, 2009 at 16:27
ThreadID: 68947 Views:1938 Replies:10 FollowUps:7
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Hi Guys

Just started to notice a deep humming type noise in my 60 Series crusiser. Everything sounds fine in 1st and 2nd gear, but when I get to the top of 3rd and the top of 4th gear the noise starts, and it gets louder as my speed increases (No loss of power). It only seems to happen when Im at high revs, If I back off the pedal at say 70 - 100Km the noise stops, then when I push down againg it starts again. Im wondering if anyone may know what the problem is, or experienced something like this in older 5 speed manual. Im thinking it may be gear, transfer related and not the engine?

Any advice would be appreciated

Cheers
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Reply By: Member - Malcolm (Townsville) - Monday, May 18, 2009 at 17:15

Monday, May 18, 2009 at 17:15
Sounds like could be the pinion in the diff - not much to worry about unless it gets really loud.

Check the oil in your diff and gearbox lately ? When was it last changed ? What does it look like ? Milky ?

Malcolm
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AnswerID: 365520

Reply By: Member - Scrubcat (VIC) - Monday, May 18, 2009 at 18:56

Monday, May 18, 2009 at 18:56
G`day,

Now this may seem ridiculous but a few years back I owned a hj45 ute and it had a VHF antenna in the center of the roof. Any way the ute all of a sudden developed this loud humming noise but only at a reasonable speed, the faster I went the louder it got, slower I went the lower the noise and at 40 or 50 km/h it would stop altogether.
It took me weeks and a bit of money for mechanics before one day I noticed that someone had dropped a 1/2" washer over the antenna on the roof. Vibration at speed caused by air moving the washer.
Bloody mates for you, they still laugh about it. LOL

Scrubby.
I don`t know where i`m going but i`m enjoying the journey.

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AnswerID: 365543

Reply By: tim_c - Tuesday, May 19, 2009 at 16:39

Tuesday, May 19, 2009 at 16:39
Hi Falcon,

Is there any vibration/rumble, or just the hum? You said it stops when you back off the accelerator - could be universal joints in the tail shaft? I'm assuming at 70-100km/h you'd be in 2WD - are the front hubs locked in?
AnswerID: 365688

Follow Up By: Falcon46 - Tuesday, May 19, 2009 at 16:48

Tuesday, May 19, 2009 at 16:48
Just A hum, Im in 2wd and the Hubs are not locked, it only starts to happen when I get to the top end of 3 and 4.
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FollowupID: 633398

Follow Up By: tim_c - Wednesday, May 20, 2009 at 11:39

Wednesday, May 20, 2009 at 11:39
I'm assuming the noise has only recently begun?

If it's a hum with no vibration, I'd tend to think wind noise - are all the doors/windows shut properly? Have you installed new accessories (roofrack, CB aerial, etc.)? Has one of the end-caps fallen out of your roofbars... etc. etc.?

It's a puzzle that you said it disappears when you back off - wind noise doesn't normally do that! Where does the noise sound like it's coming from - one place or all around you? Might give some clues for you to start hunting as it's very difficult to find a noise like that at the best of times, let alone on a forum!
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FollowupID: 633531

Reply By: PeterInSa - Tuesday, May 19, 2009 at 20:53

Tuesday, May 19, 2009 at 20:53
For a hum, I would also consider the tyres, swap the back tyres for a different tread pattern, if no change then the front. There is a way for determining the source of the noise but it is dangerous as far as I am concerned but is used by mechanics and it works.

Peter
AnswerID: 365732

Reply By: Member - ross m (WA) - Wednesday, May 20, 2009 at 12:57

Wednesday, May 20, 2009 at 12:57
My 73 series did this and it was the diff needing a rebuild.
It has the same components as 60 series.
Some diff and gearbox mechanics have a microphone they put near a suspect part and listen to it while they drive
AnswerID: 365813

Follow Up By: Member - ross m (WA) - Wednesday, May 20, 2009 at 12:59

Wednesday, May 20, 2009 at 12:59
You can also remove the rubber gearstick cover and go for a drive. If it is in the gearbox or t/case you will hear it
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FollowupID: 633540

Follow Up By: Falcon46 - Wednesday, May 20, 2009 at 13:19

Wednesday, May 20, 2009 at 13:19
Thanks Ross

Is a diff rebuild expensive?
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FollowupID: 633543

Follow Up By: tim_c - Wednesday, May 20, 2009 at 15:16

Wednesday, May 20, 2009 at 15:16
Falcon, it will depend what's wrong with it, but they're usually not cheap. Before you commit to such drastic action, I'd suggest you get a reputable transmission mechanic to come for a spin with you and demonstrate the noise to him. If you're anywhere near Canberra, I'd highly recommend speaking to Allan Kent from Woden Transmission Services - in less than 5 seconds of driving, he correctly diagnosed without hesitation that I had a worn pinion bearing in my Jackaroo. Holden on the other hand, had the car for a day and said "We won't really know what it is until we pull the diff apart and inspect it".
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FollowupID: 633557

Follow Up By: Member - ross m (WA) - Wednesday, May 20, 2009 at 22:52

Wednesday, May 20, 2009 at 22:52
The last two cost about $700 and $800 respectively for my 73 and 75 series.
The more expensive job had new wheel bearings I think.
These prices were drive in ,drive out.

I too recommend you let someone who knows diffs and gearboxes to give their opinion.
Ask the tough questions,you dont want to part with your money and still have the noise
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FollowupID: 633630

Reply By: peteC - Wednesday, May 20, 2009 at 13:53

Wednesday, May 20, 2009 at 13:53
Had a similar issue when I bent a tailshaft. Had it rebuilt and had the same symptoms as you have. Took it back to repairer who said it was fine and started talking diff probelms etc. Took it to another repairer who balanced it on his machine problem gone. Have you been bush bashing latley that may have damged the tailshaft? An out of balance tailshaft will give you these symptoms.

What you could also do to reduce the list of problem areas is remove the tailshaft and run in 4WD. If problem still exists it is nothing to to with the tailshaft back. If it does still exist its either tails shaft, uni or diff.
AnswerID: 365822

Reply By: peteC - Wednesday, May 20, 2009 at 13:53

Wednesday, May 20, 2009 at 13:53
Had a similar issue when I bent a tailshaft. Had it rebuilt and had the same symptoms as you have. Took it back to repairer who said it was fine and started talking diff probelms etc. Took it to another repairer who balanced it on his machine problem gone. Have you been bush bashing latley that may have damged the tailshaft? An out of balance tailshaft will give you these symptoms.

What you could also do to reduce the list of problem areas is remove the tailshaft and run in 4WD. If problem still exists it is nothing to to with the tailshaft back. If it does still exist its either tails shaft, uni or diff.
AnswerID: 365823

Reply By: peteC - Wednesday, May 20, 2009 at 13:53

Wednesday, May 20, 2009 at 13:53
Had a similar issue when I bent a tailshaft. Had it rebuilt and had the same symptoms as you have. Took it back to repairer who said it was fine and started talking diff probelms etc. Took it to another repairer who balanced it on his machine problem gone. Have you been bush bashing latley that may have damged the tailshaft? An out of balance tailshaft will give you these symptoms.

What you could also do to reduce the list of problem areas is remove the tailshaft and run in 4WD. If problem still exists it is nothing to to with the tailshaft back. If it does still exist its either tails shaft, uni or diff.
AnswerID: 365824

Follow Up By: tim_c - Wednesday, May 20, 2009 at 15:07

Wednesday, May 20, 2009 at 15:07
You having a bad-computer day Pete, or you just remember your teacher telling you that repetition was the best way to learn?! :)
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FollowupID: 633556

Reply By: Member - Graham H (QLD) - Wednesday, May 20, 2009 at 22:58

Wednesday, May 20, 2009 at 22:58
Perhaps an air leak somewhere and it starts sucking when u get going hard.
Or exhaust and only when going hard again.


Just a thought.
AnswerID: 365910

Reply By: Big Woody - Thursday, May 21, 2009 at 06:56

Thursday, May 21, 2009 at 06:56
It is just the natural evolution of turning into a Hummer.

Don't complain, Hummers are worth more than 60 Series.

Hehe!

Sorry - couldn't help myself.


BW
AnswerID: 365928

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