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rowlejohn
Member Since: 15 Sep 2017
Location: Montmorillon, Vienne (86)
Posts: 216
  
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Hi Guys...Took the car out today ( 2008, Disco 3,TDV6, Auto, HSE) with the single axle, unladen trailer. had driven about 20 miles without problems and suddenly experienced, out of the blue, fairly severe wheel wobble,as though a wheel was badly out of balance or maybe a flat tyre, the wobble was between 25 to 50 mph. Pulled up and checked the tyres on the car and trailer all were good, none overheated and secure. There were no "Mechanical" noises signifying say a bearing fallure or CV joint fault etc. I did however get a whiff of burning rubber at the front of the car. Checked the drive belt and it looked good. Drove slowly for a few miles then parked up for lunch and decided to return home. Car ran fine without issues for about 25 miles until just after I had driven over a speed ramp at about 15 mph when the wobble reappeared for about another 5 miles. After the initial stop when I smelt burning rubber, the smell did not reappear.
Can anyone give me any pointers or tips to where i can start looking for the cause.
Thanks in anticipation of replies Relocated to Mid France from N. Wales March 2021
Rovacomlite and IDD/ SSD diagnostics user
Previous Landies
3.9 SE Classic
3.5 V8 Disco
4.6 P38 HSE
L322 Vogue HSE
TD4 ES Freelander 1
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 7th Feb 2023 8:15 pm |
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Hardware
Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12721
  
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propshaft centre bearing ? seen on here the rubber fails horribly.
I'd have thought a gaiter at the front end would need the joint or bearing to be very knackered to burn the rubber so wouldn't fit with it seemingly recovering for a bit.
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| 7th Feb 2023 8:23 pm |
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rowlejohn
Member Since: 15 Sep 2017
Location: Montmorillon, Vienne (86)
Posts: 216
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Thanks for the prompt reply Hardware 
I racked my brains this morning thinking of what rubber components are on the drive train and could possibly burn apart from the tyres. When I pulled up and got out of the car there was no visible signs of smoke which would have given me a clue as to where it was coming from.
I thought about the possibilty of the centre propshaft bearing, I have had them fail in past on the Disco and also the old Freelander I had but never experienced one overheating, just made a clunking noise where the rubber had sheared from the metal clamp and left the bearing race to bounce off the metal housing, but there is always a first time. The propshaft bearing was replaced about 18 months ago (Genuine GKN) and the car has probably done around 8000 miles max since.
However, it's a starting point for investigations so it will be up on the ramps for inspection as soon as possible. If it does turn out to be the support bearing, I'll go for a new propshaft.
Will post my findings.
In the meantime Guys-keep the ideas coming
John Relocated to Mid France from N. Wales March 2021
Rovacomlite and IDD/ SSD diagnostics user
Previous Landies
3.9 SE Classic
3.5 V8 Disco
4.6 P38 HSE
L322 Vogue HSE
TD4 ES Freelander 1
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| 7th Feb 2023 9:31 pm |
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Martin
Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18457
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Sticky front brake caliper can cause really bad shake/wobble. Tell tale sign is a significantly hotter wheel/disc than the other side. 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
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| 7th Feb 2023 9:47 pm |
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Yankee_Rover
Member Since: 02 Jun 2021
Location: Seattle
Posts: 183
  
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To Martin’s point a sticky caliper can cause enough heat that it “burn” the grease lubricating slide pins, this could be the smell you notice. 2008 LR3 HSE, 4.4L V8
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| 7th Feb 2023 11:23 pm |
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rowlejohn
Member Since: 15 Sep 2017
Location: Montmorillon, Vienne (86)
Posts: 216
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Thanks Guys....appreciated
When I first stopped, I felt the tyres and wheels and they were no warmer than usual.
I will certainly remove the wheels and calipers to check for stickiness of the pistons and guide pins which is not too much of a job. Whilst the car is raised I will also check the rear propshaft centre support bearing for damage and have a general look around underneath at CV joint gaiters and any other rubber bits. Relocated to Mid France from N. Wales March 2021
Rovacomlite and IDD/ SSD diagnostics user
Previous Landies
3.9 SE Classic
3.5 V8 Disco
4.6 P38 HSE
L322 Vogue HSE
TD4 ES Freelander 1
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| 8th Feb 2023 5:39 pm |
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loanrangie
Member Since: 18 Jun 2017
Location: Melbourne
Posts: 605
 
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Prop bearing wear wont cause wheel wobble, i'd be checking over the bushes and steering rack ends.
Do any of the tyres look to be scrubbing out in the front ?, bearings dont always screech until the grease has gone so dont discount them yet.
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| 9th Feb 2023 4:18 am |
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zig
Member Since: 09 Sep 2005
Location: Scotland
Posts: 619
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Sounds as if it a sticking brake caliper. If you touch the alloy wheels and compare the temperature side to side do they feel to be the same temperature (I have used a non contact infrared body thermometer set in surface mode to check this in the past)?
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| 9th Feb 2023 6:30 pm |
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rowlejohn
Member Since: 15 Sep 2017
Location: Montmorillon, Vienne (86)
Posts: 216
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Thanks Guys for all of your input
Going to remove the front wheels tomorrow and check the calipers, wheel bearings, CV joints, ball joints and wishbone bushes etc.
Tyre wear appears to be normal and even across the tread width with no apprent signs of scrubbing, will be able to see more when the wheels are off.
I've just remembered.....Years ago, had a Company Ford Sierra and had something similar, the car had done around 10000 miles from new when I experience a "Thumping" noise and shcocks coming through the steering wheel. Took it to a tyre specialist who removed a tyre from the front to find that part of the inner casing had delaminated and scrubbed the inside of the tyre causing about a pound of rubber dust to accumulate plus the delaminated bit. They phoned Good Year who immediately told them to remove all five tyres, the spare was unused, and replace them F.O.C.
(I have Pirelli Scorpions all round that have done about 12000 problem free miles) Relocated to Mid France from N. Wales March 2021
Rovacomlite and IDD/ SSD diagnostics user
Previous Landies
3.9 SE Classic
3.5 V8 Disco
4.6 P38 HSE
L322 Vogue HSE
TD4 ES Freelander 1
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| 9th Feb 2023 6:52 pm |
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rowlejohn
Member Since: 15 Sep 2017
Location: Montmorillon, Vienne (86)
Posts: 216
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Right...Had a go today to check things over here is a summary:
Checked front wheels & tyres for wear/damage-OK (Wheel nuts were tight) Tyre wear even across tread. No damage or excessive brake dust on wheels, discs, calipers etc.
Checked for wear/noise in Wheel bearings-OK
Checked CV drive shafts and Gaiters-OK
Checked Steering box & ball joint gaiters-OK
Checked all front Ball joints for wear, including Track rods-OK
Checked suspension arm bushes for wear-OK
Checked front calipers, guide pins-OK. Removed calipers to check piston movement, both retracted without too much resistance, Offside (Drivers) was a tiny bit tighter to retract than the nearside. Checked brake pads, wear was equal on all 4 pads.
Removed heatshield and checked rear propshaft, no signs of wear in U.J's. Centre support bearing is intact with no damage to rubber bushing.
Removed Fan cowl and checked drive belt (Belt and both tensioner bearings replaced in December together with new Alternator)-no damage or signs of wear.
Had a good look underneath for possible source of the burning rubber smell-nothing evident.
Will give the car a run tomorrow-without the trailer and let you know how it goes. If the wobble returns, I'll then get the wheel balance checked, but I didn't see any signs of weights missing from the wheels, they were still attached and the fact that the wobble was intermittent and at all speeds threw me.
Thanks for all of your input and suggestions Guys Relocated to Mid France from N. Wales March 2021
Rovacomlite and IDD/ SSD diagnostics user
Previous Landies
3.9 SE Classic
3.5 V8 Disco
4.6 P38 HSE
L322 Vogue HSE
TD4 ES Freelander 1
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| 11th Feb 2023 6:04 pm |
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rowlejohn
Member Since: 15 Sep 2017
Location: Montmorillon, Vienne (86)
Posts: 216
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Hi Guys...Took the car out this morning (Without trailer) on a 30 mile round trip.
No wheel wobble When I got back home, checked the brake discs for heat and found that the R.H. front and L.H. rear discs were hotter than the other two. Yesterday I did not remove the rear calipers or wheels.
Following Martins earlier reply, I bit the bullet and bought front & rear caliper repair kits so in the near future all calipers will be refurbished.
Thanks for your comments Guys...appreciated  Relocated to Mid France from N. Wales March 2021
Rovacomlite and IDD/ SSD diagnostics user
Previous Landies
3.9 SE Classic
3.5 V8 Disco
4.6 P38 HSE
L322 Vogue HSE
TD4 ES Freelander 1
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| 12th Feb 2023 11:56 am |
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rowlejohn
Member Since: 15 Sep 2017
Location: Montmorillon, Vienne (86)
Posts: 216
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Final update....Hi Guys.
Stripped all calipers down over the past couple of days. Luckily the pistons were clear of pitting or corrosion. Gave the caliper bores a light honing and those were also in good condition. Checked that pistons could move freely (Under gravity) in the bores before fitting the seals and dust covers. The slide pins were not seized but cleaned them up and fitted new boots, re greased with sachets of grease supplied in the seal kits.
Refitted calipers and bled system.
End result is that the problem has been fully resolved so thanks everyone. Relocated to Mid France from N. Wales March 2021
Rovacomlite and IDD/ SSD diagnostics user
Previous Landies
3.9 SE Classic
3.5 V8 Disco
4.6 P38 HSE
L322 Vogue HSE
TD4 ES Freelander 1
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| 15th Feb 2023 8:33 pm |
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