The troopy is making a banging noise reversing uphill.

Submitted: Monday, Sep 26, 2011 at 15:44
ThreadID: 89252 Views:3969 Replies:16 FollowUps:19
This Thread has been Archived
When in reverse and it requires a little bit of accelerator there is a fairly loud banging noise coming from underneath.

Reversing on flat ground is no problem.

The first time it happened about two weeks ago I was slowly reversing over one of those rounded curbs to get into the driveway.

The latest was here in Bundaberg reversing out of a steep driveway at the place we are staying.

I had a look underneath but couldn't see anything out of place.

It has not happened before, and I can't really remember the last time I was in a situation where I had to reverse in similar manner.

It's a 1995 75 series, 1hz.

Back Expand Un-Read 0 Moderator

Reply By: Member - John and Val - Monday, Sep 26, 2011 at 15:52

Monday, Sep 26, 2011 at 15:52
Boo Boo,

Suggest check your engine mounts, especially the LHS front one. Sounds like the engine is lifting up on that side when called on to deliver high torque. When this happens the fan hits its surround and creates quite a clatter. (Our Troopy will vouch for this!)

Cheers

John
J and V
"Not everything that can be counted counts, and not everything that counts can be counted."
- Albert Einstein

Lifetime Member
My Profile  My Blog  Send Message

AnswerID: 466079

Follow Up By: Member - Boo Boo (NSW) - Monday, Sep 26, 2011 at 16:35

Monday, Sep 26, 2011 at 16:35
Thanks John

I have had a better look now that the motor has cooled and the engine mounts look fine and no sign of scrapping on the shroud, or damage to the radiator.

Actually had an engine mount let go on a HR holden many, many moons ago. It made quite a of a mess of the radiator. lol

0
FollowupID: 740152

Reply By: kidsandall - Monday, Sep 26, 2011 at 16:06

Monday, Sep 26, 2011 at 16:06
Give the exhaust a good shake and check the hangers. Had this on my 60 series. It would only rattle in certain situations.

Josh
AnswerID: 466080

Follow Up By: Member - Boo Boo (NSW) - Monday, Sep 26, 2011 at 16:36

Monday, Sep 26, 2011 at 16:36
Josh

Not that either.

I gave every thing a shake but nothing moved right along the pipe.

0
FollowupID: 740153

Reply By: Member - Oldbaz. NSW. - Monday, Sep 26, 2011 at 16:32

Monday, Sep 26, 2011 at 16:32
And while you're under there, Boo Boo, check for play in the tailshaft centre
bearing.....oldbaz.
AnswerID: 466081

Follow Up By: Member - Boo Boo (NSW) - Monday, Sep 26, 2011 at 16:39

Monday, Sep 26, 2011 at 16:39
Good on ya Oldbaz,,,, you waited until I went down stairs to check the other things before you posted.LOL

However,, I did give the tail shaft a bit of a wiggle but don't really know what I would look for.

Which end of the shaft should I look at and what am I looking for?

0
FollowupID: 740154

Follow Up By: Member - Oldbaz. NSW. - Monday, Sep 26, 2011 at 16:54

Monday, Sep 26, 2011 at 16:54
Boo Boo, old son, where the tailshaft passes through the carrier bearing, about midway along..the mounting between the transfer case & diff. I'm assuming troopy
has one.....oldbaz.
0
FollowupID: 740156

Follow Up By: Macca44 - Monday, Sep 26, 2011 at 17:06

Monday, Sep 26, 2011 at 17:06
G day boo boo, are you in 2 or 4 wheel drive .regards macca.
0
FollowupID: 740157

Follow Up By: Rockape - Monday, Sep 26, 2011 at 17:20

Monday, Sep 26, 2011 at 17:20
Hate to put a damper on things but troopy's don't have centre bearings.

Wish I could help but all the things that I would have suggested have been covered.

Just check the gearbox carrier mount, they can break sometimes and allow the box to move.

Hope you find it

RA.
0
FollowupID: 740158

Follow Up By: Member - Boo Boo (NSW) - Monday, Sep 26, 2011 at 17:20

Monday, Sep 26, 2011 at 17:20
In 2wd

0
FollowupID: 740159

Follow Up By: Member - Boo Boo (NSW) - Monday, Sep 26, 2011 at 17:31

Monday, Sep 26, 2011 at 17:31
Ok Oldbaz

There may not be a centre bearing, but what I did was grab the 'knuckle' attached to the transfer case in one hand and the tailshaft in the other and there is a very very small bit of play which I am assuming is normal.
Whe I grab the tail shaft and rotate it both ends move at the same time.

0
FollowupID: 740161

Reply By: Crackles - Monday, Sep 26, 2011 at 17:06

Monday, Sep 26, 2011 at 17:06
My guess is you may have lost a bolt from a brake rotor & the caliper could be dragging on the wheel when reversing????
Cheers Craig...............
AnswerID: 466084

Reply By: ob - Monday, Sep 26, 2011 at 17:06

Monday, Sep 26, 2011 at 17:06
BooBoo, I would go along with John's suggestion of an engine mount. Even if the fan is not getting up close and personal with the shroud the engine can lift up off a failed mount and land back down with a thump. If you haven't already try a pry bar or very large screwdriver and see if you can lift the gearbox or engine off the mounts, one or more may have separated.

ob
AnswerID: 466085

Follow Up By: Member - Boo Boo (NSW) - Monday, Sep 26, 2011 at 17:26

Monday, Sep 26, 2011 at 17:26
ob

Would it go bang,bang,bang,bang as I am reversing up the hill or would it only give the one bang as it goes back into position when I lay off the accelerator.

At the moment it's the bang, bang all the way up.

0
FollowupID: 740160

Follow Up By: Member - John and Val - Tuesday, Sep 27, 2011 at 08:15

Tuesday, Sep 27, 2011 at 08:15
Boo Boo,

Suggest apply full braking to lock the wheels and gingerly let the clutch out in low (or reverse) gear,so the engine is delivering torque to the transmission but nothing is moving. If you get your noise under these conditions it has to be at the engine and would point to the LHS engine mount. If not it could point to something in the transmission - universals? If you can positively decide it won't occur going forward, I'd be looking inside the brake drums as suggested below.

Cheers

John

J and V
"Not everything that can be counted counts, and not everything that counts can be counted."
- Albert Einstein

Lifetime Member
My Profile  My Blog  Send Message

0
FollowupID: 740208

Follow Up By: Member - John and Val - Tuesday, Sep 27, 2011 at 08:18

Tuesday, Sep 27, 2011 at 08:18
OOps - "I'd be looking inside the brake drums as suggested below." was intended to refer to Crackles suggestion above.

J and V
"Not everything that can be counted counts, and not everything that counts can be counted."
- Albert Einstein

Lifetime Member
My Profile  My Blog  Send Message

0
FollowupID: 740209

Follow Up By: Member - Boo Boo (NSW) - Tuesday, Sep 27, 2011 at 11:48

Tuesday, Sep 27, 2011 at 11:48
John

I put the handbrake on, the troopy in reverse and slowly let out the clutch. Nothing happened, I gave it a few revs, and still nothing happened.

So based on what you are suggesting and and a few others it could be a dry universal.

Am I getting close? lol
0
FollowupID: 740222

Follow Up By: Member - John and Val - Tuesday, Sep 27, 2011 at 13:40

Tuesday, Sep 27, 2011 at 13:40
Certainly looks that way Boo Boo. You've eliminated engine mounts as a cause, so that leaves something in the transmission or possibly as Crackles suggested, something stuck inside a brake drum. A universal sounds a good place to start. I'd look for play in the universals by putting the gearbox in neutral and manually twisting the rear tailshaft back and forth. There'll be a bit of slop in the diff, but there should be no play in the universals. To nail it down to a universal, suggest pump some grease into one and check for any improvement. Then do the other. (This won't fix the underlying problem, but should help isolate it.) If no change, you can probably rule out universals. That leaves gearbox/transfer case and rear axle. You should be able to decide if the noise is coming from under you (gearbox etc) or behind you.

Good luck!

John
J and V
"Not everything that can be counted counts, and not everything that counts can be counted."
- Albert Einstein

Lifetime Member
My Profile  My Blog  Send Message

0
FollowupID: 740232

Follow Up By: Member - Boo Boo (NSW) - Tuesday, Sep 27, 2011 at 15:07

Tuesday, Sep 27, 2011 at 15:07
Thanks John

I was going along with your line of thought until you started talking about transfer cases and gearboxes.LOL

I can only hope it is just a dry universal or something as simple.

As for telling where a noise comes from, well I am deaf in one ear which means I can here noise but can't tell what dierction it comes from, a bit of a pain in neck in situations like this.

0
FollowupID: 740241

Reply By: BarryR1 - Monday, Sep 26, 2011 at 17:14

Monday, Sep 26, 2011 at 17:14
Mate, have you seen the missus since? (Sorry just couldn't help myself there).

I was going to suggest checking the tail shaft as well.

Cheers Baz
AnswerID: 466087

Follow Up By: Member - Boo Boo (NSW) - Monday, Sep 26, 2011 at 17:33

Monday, Sep 26, 2011 at 17:33
Barry

Took a couple of minutes but finally got the joke.

I liked it.LOL

0
FollowupID: 740162

Reply By: Member - Blaze - Monday, Sep 26, 2011 at 17:51

Monday, Sep 26, 2011 at 17:51
Can't diagnose your problem mate, but its easily fixed, only drive up hills dont back up, sorry couldn't help myself LOL
AnswerID: 466088

Reply By: Roughasguts - Monday, Sep 26, 2011 at 17:59

Monday, Sep 26, 2011 at 17:59
Trailing arm bushes shagged makes a banging noise as the tail shaft binds up and releases under load.

So kinda axle tramping!

Chears.
AnswerID: 466090

Follow Up By: Member - Boo Boo (NSW) - Monday, Sep 26, 2011 at 18:11

Monday, Sep 26, 2011 at 18:11
Hmmmm,,,

Does anyone know a good mechanic in Bundaberg?

I'll go to them with a few suggestions of what it might be and hope they don't get too technical. lol

Although your thoughts of what it might be don't sound too expensive!!!!

Thanks for your help people,,it's always appreciated.

0
FollowupID: 740167

Reply By: Andrew & Jen - Monday, Sep 26, 2011 at 18:09

Monday, Sep 26, 2011 at 18:09
Hullo Boo Boo
Had a similar problem not long ago with our 80 series
Is it a banging noise, a rattling, or scraping?
We had had a new 3" exhaust put in and the tolerances are tight
OK at first but soon, when reversing, there was this rattle/banging in reverse up hill when requiring some torque.
It was traced to the exhaust touching the transfer case when the engine/box slightly rotated on the mounts in the opposite direction to normal forward travel
So just getting underneath and trying to move the exhaust around when still won't necessarily produce the sound as the engine is not twisted on it's mounts at the same time.
Cheers
Andrew
AnswerID: 466091

Reply By: 76 series cruiser - Monday, Sep 26, 2011 at 18:09

Monday, Sep 26, 2011 at 18:09
check the gearbox mounts and maybe check u bolts
AnswerID: 466092

Reply By: Member - Duke (TAS) - Monday, Sep 26, 2011 at 19:09

Monday, Sep 26, 2011 at 19:09
Does your Troopy have a Limited Slip Diff. If so check the oil level and if it hasn,t been changed for a while change with the correct oil.
Duke
AnswerID: 466098

Reply By: Fred G NSW - Monday, Sep 26, 2011 at 20:09

Monday, Sep 26, 2011 at 20:09
Boo Boo, if ya wasn't dizzy and tired before, ya oughta be by now I guess LOL

I hope them there steps aren't too many or steep :-)

BTW, something just came to mind.

Years ago I had an MQ Patrooool, and the near side manual hub lock failed and would'nt engage..In reverse it sounded like a boat winch winding over and over the ratchet. Not exactly a loud bang, but constant metallic whack, whack, whack as the gear wound over the worn part with each hub rotation. Let's hope it's something simple and cheap to fix mate. Keep us posted, aye.

Good luck with it mate.

There should be something in Bundy'berg to keep you occupied while they sort it out.

Cheers,

Fred.
AnswerID: 466105

Reply By: Member - Doug T (NT) - Monday, Sep 26, 2011 at 22:48

Monday, Sep 26, 2011 at 22:48
Does your Troopy have an Auto Diff Un-Locker, if so make sure both drive tyres have equal pressure, and as someone else suggested check the rear diff oil, although if the oil was that low you would hear it whining in forward.
Also jack both rear wheels off the ground and see if there is any play in the bearings.

That's my 5$$$$$ worth.


.
gift by Daughter

Lifetime Member
My Profile  My Blog  Send Message

AnswerID: 466116

Reply By: Member - tojofixa - Monday, Sep 26, 2011 at 22:58

Monday, Sep 26, 2011 at 22:58
Hi, Boo Boo,
It sounds to me like you may have a dry universal joint in the rear tailshaft.
To check this properly you would need to disconnect & remove the tail shaft from the vehicle & manually check the universal joints for freedom of movement in all directions. Also check for any free play in the universal joints.
If you need to replace the uni. joints make sure that you position the grease nipple correctly so that it is possible to get a grease gun onto the nipple when the tail shaft is refitted.
Hope this is of some help.
Regards,
Tojofixa
AnswerID: 466118

Follow Up By: Member - Boo Boo (NSW) - Tuesday, Sep 27, 2011 at 06:35

Tuesday, Sep 27, 2011 at 06:35
Tojofixa


I'm going to see a mechanic this morning.

Don't know which one but I'd like get the problem fixed as soon as possible.

0
FollowupID: 740201

Follow Up By: mike39 - Tuesday, Sep 27, 2011 at 07:25

Tuesday, Sep 27, 2011 at 07:25
Mine does exactly the same.

It is the exhaust downpipe from the engine where it goes past the chassis rail.

Check the gap there, if only a few mils., then when you reverse the opposite torque reaction from the engine slightly rotates it on the mounts resulting in a loud rap rap rap as the pipe hits the chassis.
mike
0
FollowupID: 740204

Reply By: Member - Boo Boo (NSW) - Tuesday, Sep 27, 2011 at 11:54

Tuesday, Sep 27, 2011 at 11:54
OK it's booked in for Friday morning.

I'll let everyone know the diagnosis Friday afternoon.

I'm now taking bets on what is the problem.LOL

My gut feeling is it is a universal joint.
AnswerID: 466148

Reply By: Member - Boo Boo (NSW) - Friday, Sep 30, 2011 at 17:16

Friday, Sep 30, 2011 at 17:16
OK people

The troopy went to a mechanic this morning and the verdict is that the noise is coming from the gearbox, but they don't think it is serious and does not require attention at the moment.

They are probably right. I have now reversed up the same driveway three more times and it has not made a sound.

Thanks for all the advice we were close. lol


AnswerID: 466414

Follow Up By: mike39 - Saturday, Oct 01, 2011 at 08:02

Saturday, Oct 01, 2011 at 08:02
Thanks for that Boo.
So often the poster (and perhaps the problem) dissappear without trace.
mike
0
FollowupID: 740550

Sponsored Links