Welcome to the Australian Ford Forums forum.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and inserts advertising. By joining our free community you will have access to post topics, communicate privately with other members, respond to polls, upload content and access many other special features without post based advertising banners. Registration is simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact us.

Please Note: All new registrations go through a manual approval queue to keep spammers out. This is checked twice each day so there will be a delay before your registration is activated.

Go Back   Australian Ford Forums > Club and Speciality Forums > Forum Community Car Clubs > AU Falcon.com.au

Reply
 
Thread Tools Display Modes
Old 27-10-2015, 07:04 PM   #1
Lukeyson
Right out sideways
 
Lukeyson's Avatar
 
Join Date: Dec 2004
Location: Coffs Harbour NSW
Posts: 5,306
Default Grinding noise AU XR8 rear

Hi all,
I am presuming this may be the dreaded hub issue, car is AU2 XR8 sedan, auto. I have done some digging on some old threads but I am wondering if it sounds like hub. Left rear knocking sound, not from upper shock I have had that before, but in reverse it makes a very unpleasant grinding and light vibration at slow speeds. I am going to put it on stands over the weekend but just getting prepared.
Any thoughts?
__________________
2010 FG XR50 Turbo | 2007 FPV BFII GT, BOSS 302
Lukeyson is offline   Reply With Quote Multi-Quote with this Post
Old 27-10-2015, 08:01 PM   #2
Maka
Au Falcon = Mr Reliable
 
Maka's Avatar
 
Join Date: Sep 2009
Location: North West Slopes & Plains NSW
Posts: 4,076
Valued Contributor: For members whose non technical contributions are worthy of recognition. - Issue reason: Embodiment of the AFF spirit in his efforts with ACP. 
Default Re: Grinding noise AU XR8 rear

Does it get louder when turning, a sort of ch ch ch sound getting faster with speed? Cv's ok?

cheer's, Maka
__________________
Ford AU Series Magazine Scans Here - www.fordforums.com.au/photos/index.php?cat=2792

Proud owner of a optioned keeper S1 Tickford Falcon AU XR6 VCT - "it's actually a better-balanced car than the XR8, goes almost as hard and uses about two-thirds of the fuel" (Drive.com 2007)
Maka is offline   Reply With Quote Multi-Quote with this Post
This user likes this post:
Old 27-10-2015, 09:12 PM   #3
Lukeyson
Right out sideways
 
Lukeyson's Avatar
 
Join Date: Dec 2004
Location: Coffs Harbour NSW
Posts: 5,306
Default Re: Grinding noise AU XR8 rear

Its only noticable under 10-20kph. At hwy speed nothing and the car feels stable
__________________
2010 FG XR50 Turbo | 2007 FPV BFII GT, BOSS 302
Lukeyson is offline   Reply With Quote Multi-Quote with this Post
Old 27-10-2015, 11:06 PM   #4
Fyrestorm
Spanner Thrower
 
Join Date: Oct 2013
Location: Parramatta
Posts: 296
Default Re: Grinding noise AU XR8 rear

Sounds like handbrake to me. Mine did it for a while before I "fixed" it. (Reefed it up going out of the driveway. Soon stopped.)
__________________
1999 AU Futura Wagon (Nickname Betsie the Barge-***)
Current Mods: Fairmont Cluster, LED's Changed to Purple, Lukey Competition Extractors, 2.5" Hi flow Cat, Hi-Stall Converter, ED Box with FG internals, AUIII VCT Fuel Rail + Injectors, F6 Fuel Regulator, Stereo upgrade, Aftermarket LPG.

Awaiting Wife Approval Mods:

TE50 Front Bar, AU Tickford/SR Interior, Roof Racks, Slimline Weathershields, 2.5" Cat Back Exhaust, 27mm Front Sway Bar, Other Shiny things!
Fyrestorm is offline   Reply With Quote Multi-Quote with this Post
Old 28-10-2015, 07:15 AM   #5
Maka
Au Falcon = Mr Reliable
 
Maka's Avatar
 
Join Date: Sep 2009
Location: North West Slopes & Plains NSW
Posts: 4,076
Valued Contributor: For members whose non technical contributions are worthy of recognition. - Issue reason: Embodiment of the AFF spirit in his efforts with ACP. 
Default Re: Grinding noise AU XR8 rear

One other thing to be mindful of is when you jack the back end up & spin the wheels looking for wheel or hub runout, is there might not be any wheel wobble but the hub & bearing assembly can be still the issue. That was my issue. I replaced hub bearings, put a full handbrake kit through it & replaced rear disc's on my vct xr6, its quiet now!

It also may be a warped rear disc, knocking could be the handbrake shoe has popped out of the retaining clip, not sure so though. Good luck, maybe some one else will chime in with a more definitive suggestion or answer.

cheer's, Maka
__________________
Ford AU Series Magazine Scans Here - www.fordforums.com.au/photos/index.php?cat=2792

Proud owner of a optioned keeper S1 Tickford Falcon AU XR6 VCT - "it's actually a better-balanced car than the XR8, goes almost as hard and uses about two-thirds of the fuel" (Drive.com 2007)
Maka is offline   Reply With Quote Multi-Quote with this Post
Old 30-10-2015, 10:54 AM   #6
Lukeyson
Right out sideways
 
Lukeyson's Avatar
 
Join Date: Dec 2004
Location: Coffs Harbour NSW
Posts: 5,306
Default Re: Grinding noise AU XR8 rear

Quote:
Originally Posted by Fyrestorm View Post
Sounds like handbrake to me. Mine did it for a while before I "fixed" it. (Reefed it up going out of the driveway. Soon stopped.)
Thanks for the comments guys, Fyrestorm I think you are on to it. Did your 'fix' too, and that noise is gone now for 2 days.
__________________
2010 FG XR50 Turbo | 2007 FPV BFII GT, BOSS 302
Lukeyson is offline   Reply With Quote Multi-Quote with this Post
Old 23-11-2015, 08:55 AM   #7
Lukeyson
Right out sideways
 
Lukeyson's Avatar
 
Join Date: Dec 2004
Location: Coffs Harbour NSW
Posts: 5,306
Default Re: Grinding noise AU XR8 rear

I might have to move this car on soon, otherwise I will make hundred of threads in here.

New vibration/shudder. And now that its more evident I realise a less worrying version of it has been there for a while. used to shudder at 1500rpm on deceleration, that was it.

I am presuming its the auto, now I get a bad driveline shudder under deceleration under 2500rpm, whole car body resonates. I know its bad to do whilst moving, but I popped it into neutral whilst rolling and the shudder is gone. Will take it to auto trans people, but could this be torque converter or something?
__________________
2010 FG XR50 Turbo | 2007 FPV BFII GT, BOSS 302
Lukeyson is offline   Reply With Quote Multi-Quote with this Post
Old 25-11-2015, 12:41 PM   #8
Lukeyson
Right out sideways
 
Lukeyson's Avatar
 
Join Date: Dec 2004
Location: Coffs Harbour NSW
Posts: 5,306
Default Re: Grinding noise AU XR8 rear

Diagnosis is harmonic balancer rubber has cracked in half
__________________
2010 FG XR50 Turbo | 2007 FPV BFII GT, BOSS 302
Lukeyson is offline   Reply With Quote Multi-Quote with this Post
This user likes this post:
Reply


Forum Jump


All times are GMT +11. The time now is 08:35 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Other than what is legally copyrighted by the respective owners, this site is copyright www.fordforums.com.au
Positive SSL