Grinding kind of noise when take off

[dom14]

I have a GQ Patrol 20+years old. 300k on clock. Manual and carby on RB30 motor. The car makes a slight grinding noise when taking off. If it's up the hill take off, the grinding noise is stronger, if I'm taking a bend, the grinding noise is higher as well. If it's flat ground or down the hill take off, less or no noise. Only on first gear(or second gear some times) when picking up.
It's been there for last three years or so.
Do I need to worry about it if I'm going on long trips?
Where is the noise coming from?!

Any help would be great!
Thanks guys

[taslucas]

Hard to guess without hearing it. Could it be a seized brake caliper?

FanTapstic!

[Lieney]

x2 with taslucas.
Hard to pin-point with that description mate.
Brakes, piece of wire caught, gearbox issues, CV joints, drive-line blah blah.
You need to do some more playing around to isolate the noise and exactly when and how it's occurring. Using words as a noise is hard to describe it with the right words as best you can.
If it's been happening for some time and you are thinking about doing trips, I'd be looking at it now.

[krbrooking]

Check driveline components like your tailshaft or input shaft to gearbox (Difficult and highly unlikely for length of time) or even rear axle's/bearings. could be flexing too much under load. I am no mechanic but that is one area I would cover after checking callipers and twisted brake lines and thing of the like good luck mate keep us posted.

IMO, any unusual noise is slightly worrying and should be addressed.

[threedogs]

Any noise needs addressing, have a mate stand outside listening to find the area .Then go from there

[andrewh]

My GQ did this - felt like a grinding as I took off at slow speeds. I was guessing driveline...

I worried about it for a while but never did end up finding it!

[dom14]

x2 with taslucas.
Hard to pin-point with that description mate.
Brakes, piece of wire caught, gearbox issues, CV joints, drive-line blah blah.
You need to do some more playing around to isolate the noise and exactly when and how it's occurring. Using words as a noise is hard to describe it with the right words as best you can.
If it's been happening for some time and you are thinking about doing trips, I'd be looking at it now.

I've been doing trips with the noise. Yeah, I know, not a good idea. I wish I can record the noise and upload here. Ha ha.. just a funny idea, but may become a reality one day?! :), I'm sure you guys prefer not to have the forum saturated with grinding and grunting noises of 4WDs. :))

It's usually under load it happens. I checked the brakes or wires being caught, but looks pretty good there. Only on 2 wheels, as I don't use this old fella much on 4WD.
My fear is gearbox, CV, diff, etc. I checked the universal joints for play, but looked and felt fine. But, that's not the proper way to check uni joints, right? I removed and both drive shafts and cleaned them, then greased them with a gun. That didn't make a huge difference.

I guess, it's time to put car on stumps and go under it.
BTW mate, Should I eliminate the CV, front bearings, axles,front diff, front drive shaft, transfer box?
It's doing it when on 2 wheels. So, front driveline can't be the cause of this issue?!! Am I right?

Thanks mate.

[dom14]

Any noise needs addressing, have a mate stand outside listening to find the area .Then go from there

Yep. So far I've been doing it solo. not the best way.

[dom14]

Is it still doing it mate?! or has it gone away after a service?!

[dom14]

Check driveline components like your tailshaft or input shaft to gearbox (Difficult and highly unlikely for length of time) or even rear axle's/bearings. could be flexing too much under load. I am no mechanic but that is one area I would cover after checking callipers and twisted brake lines and thing of the like good luck mate keep us posted.

IMO, any unusual noise is slightly worrying and should be addressed.

Hi mate. Brakes and calipers are fine. Yes, I'll be starting from the drive shaft and try to locate the origin of the noise. I'll keep my findings posted.
Cheers

[dom14]

Hard to guess without hearing it. Could it be a seized brake caliper?

FanTapstic!

I did the brakes recently mate. It's more of a low pitched rumbling type of grinding noise. So, I reckon it's more from the driveline. So far, it's only on first gear as I take off at a place when it needs bit more throttle.
For example taking off while taking a turn, taking of up a hill, etc. I can't remember the car doing it on second gear on regular basis, but I better double check tomorrow.
Thanks

[BigRAWesty]

What engine rpm's are we talking? Low 700-1000 or higher?

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

[dom14]

What engine rpm's are we talking? Low 700-1000 or higher?

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

It's take off rpm's. 1500-2000 i reckon.

[BigRAWesty]

What engine? Transmission? And does it do it in 4wd also?

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

[Winnie]

I'm sure you guys prefer not to have the forum saturated with grinding and grunting noises of 4WDs.

No mate absolutely the opposite. Take a video if you can and upload it here!

[taslucas]

I have a GQ Patrol 20+years old. 300k on clock. Manual and carby on RB30 motor.


What engine? Transmission? And does it do it in 4wd also?

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)



FanTapstic!

[BigRAWesty]

Do the manual rb30's have the same rumble as the 4.2's?

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

[taslucas]

Do the manual rb30's have the same rumble as the 4.2's?

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

I wouldn't say that they sound similar. The 4.2s are nearly half again bigger than the rb so they have a deeper rumble

FanTapstic!

[Winnie]

Think he means gearbox grumbles... The TD42 has a distinct gearbox growl at low revs.

If you're happy and you know it tap a post!

[taslucas]

Think he means gearbox grumbles... The TD42 has a distinct gearbox growl at low revs.

If you're happy and you know it tap a post!

Ahhhhhh.....

FanTapstic!

[BigRAWesty]

Think he means gearbox grumbles... The TD42 has a distinct gearbox growl at low revs.

If you're happy and you know it tap a post!

That's the one. A lot of people get concerned about it, so just putting it out there.

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

[dom14]

Think he means gearbox grumbles... The TD42 has a distinct gearbox growl at low revs.

If you're happy and you know it tap a post!

Yes. it is at low revs. except it is not TB42, it's RB30.
It sounds more like a gearbox grumble, judging from the location of the sound.

If that's the case, is that something I need not to worry about at this stage?!

[BigRAWesty]

Does it disappear if you change at a higher rpm?

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

[dom14]

Does it disappear if you change at a higher rpm?

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

It disappears as soon as I gain enough speed and shift to second gear.

And also, it didn't get any worse over the last few years......rather it got slightly better, after I greased the front ball joints last year. I also did the front hub and bearings as well(repacked them). From memory, it slightly got better after servicing the front ball joints and the bearings. That may be because I improved the lubrication of the front end?!!!

[dom14]

Update

It is a low pitch growling kind of noise that doesn't appear all the time.
90% of the time on first gear on low revs. Disappears as soon as I gain enough speed.
It has been there for last three + years.
It didn't get any worse, rather got little bit better after I did the front ball joint lubrication, hub and bearing repacking. Hub and bearings looked fine, but I repacked them anyway. ball joints were bit short of grease. I also cleaned and greased(with a gun) all the universal joints. I actually took the back driveshaft off to clean if properly and grease it(covered with hard soil).
The noise isn't coming from brakes. rotors machines and pads replaced couple of months ago.
Car has a suspension lift. Not sure whether it's 2" or 4".
I did the test drive the other day on 2WD and 4WD. I couldn't reproduce the noise. It has been like that. Sometime it's there, sometime it isn't.

Any help guys?!

Thanks

[Lieney]

Sounds like a 1st gear issue.
How's the gearbox oil?
Does it have auto locking hubs? Maybe the hubs (auto or not) are causing issues at lower speeds. Although mine sounded different to what you describe.
How are the front wheel bearings now, push them sideways firmly at the top, with the brake pedal depressed. They're should be no movement.
How's the diff back-lash? Sounds like a front end issue, but never hurts to check.
Make sure you post what it was

[dom14]

Sounds like a 1st gear issue.
How's the gearbox oil?
Does it have auto locking hubs? Maybe the hubs (auto or not) are causing issues at lower speeds. Although mine sounded different to what you describe.
How are the front wheel bearings now, push them sideways firmly at the top, with the brake pedal depressed. They're should be no movement.
How's the diff back-lash? Sounds like a front end issue, but never hurts to check.
Make sure you post what it was

Hi mate,
I was able to reproduce the noise yesterday. I can confirm now it does it in both 1st and 2nd gears. It's less on 2nd gear 'cos once I gained enough speed momentum, it goes away.
I got manual locking hubs. Noise is coming from the gearbox area, both the from the feeling of vibration and direction of the noise.
Wheel bearings are good in my assessment. No play, and no drag.
Can you describe the diff back-lash?
Thanks