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05-11-2005, 09:31 AM
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#1 | ||
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Regular Member
Join Date: Aug 2005
Posts: 150
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I've started noticing a whine coming from the rear end of my AU1 Forte
(95 000k) and I'm presuming its the diff. Much worse when the rear seats are folded flat as the noise travels through. Recently reading through a copy of the Haynes Manual and they recommend changing the diff oil every 90 000k. Any one agree with this? I have'nt checked the owners manual to see if this is done. Is it tru that the diffs are typically noisy in the Falcon? |
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05-11-2005, 10:27 AM
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#2 | ||
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Back on the road
Join Date: Dec 2004
Location: Wollongong, NSW
Posts: 3,205
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Is the whine always there, changing pitch/volume as the road speed increases? (bearings)
or is it only at certain speeds? (gearset) Changing the oil is easy. The bolt in the middle at the bottom of the diff cover is for draining the oil. 1. Remove the bolt, draining the oil into a container 2. tighten the bolt back up 3. Remove the filler plug from the diff cover 4. Add oil until it is level with the bottom of the filler plug 5. tighten filler plug back up I put Castrol SAF-XA in my ute at 100,000km, and i had my diff rebuilt at 180,000km. I'll be changing every 50,000 from now on ;)
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------------------------------------------------------------------------- AU XR8 Ute 13.90 @ 100mph - http://www.aufalcon.com/xr8ute 5L Windsor, GT40X heads, Crane 2030, Pacey 4-1s, Lukey 3", 3.91:1, auto. Tuned by me w/Quarterhorse and BinaryEditor. Coming Soon: Ported lower intake, Tickford "Premium" Brakes, and a good wash. |
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05-11-2005, 10:28 AM
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#3 | ||
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Join Date: Mar 2005
Posts: 5,954
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i got the same problem as you mate, starting to sound like a bloody taxi! its worse when you drive it "manually".
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05-11-2005, 10:51 AM
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#4 | ||
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Miami Pilot
 
Join Date: Jan 2005
Location: ACT
Posts: 21,704
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Rob - that will be your auto trans. Get an auto trans service done, and I reckon they will find metal shavings in the pan/filter. This noise is why I got my auto rebuilt under warranty.
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The Hammer: FG GTE | 376rwkw | 1/4 mile 11.793 @ 119.75mph 1.733 60' (4408lb) 1 of 60 FG MK1 335 GTEs (1 of 118 FG Mk 1 & 2 335 GTEs). Mods: Tune, HSD/ShockWorks, black GT335 19” staggered replicas with 245 & 275/35/19 Michelin Pilot sport 5s Daily: BF2 Fairmont Ghia I6 ZF, machine face GT335 19” staggered Replicas with 245s and 275s, Bilsteins & Kings FPV 335 build stats: <click here> Ford Performance Club ACT |
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05-11-2005, 11:53 AM
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#5 | ||
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Join Date: Mar 2005
Posts: 5,954
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the car has already been in once for this, they found shavings in there last time!
i think i will wait till she gets rooted then stick in an LSD and some new gears, after a bit of research! cheers rob |
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06-11-2005, 07:15 AM
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#6 | ||
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Regular Member
Join Date: Aug 2005
Posts: 150
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The noise is constant and does not vary much except when you back off and coast which could suggest its the diff or tranny, but definitely coming from the rear end.
XR8ute, when you changed the diff oil, did you notice any difference? If it is bearings, what do they generally cost to replace? |
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06-11-2005, 08:14 AM
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#7 | ||
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FF.Com.Au Hardcore
Join Date: Dec 2004
Location: ACT
Posts: 4,028
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Last weekend I changed the diff oil in the wife's wagon. A check whilst changing rear springs recently showed the diff oil was very black, and frothy. The new oil did appear to quieten things down slightly.
Have you checked the level in the diff recently?
__________________
Current Rides: 2000 AU 5L XLS ute; 1970 Mustang project |
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06-11-2005, 08:15 AM
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#8 | ||
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Regular Member
Join Date: Aug 2005
Posts: 150
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No I hav'nt. I might actually change the oil today as nothing else is happening.
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06-11-2005, 10:09 AM
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#9 | ||
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Back on the road
Join Date: Dec 2004
Location: Wollongong, NSW
Posts: 3,205
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No, my diff wasn't making any noise when I first changed the oil. It was making heaps of noise by the time i got it rebuilt though....the bearings were rooted.
__________________
------------------------------------------------------------------------- AU XR8 Ute 13.90 @ 100mph - http://www.aufalcon.com/xr8ute 5L Windsor, GT40X heads, Crane 2030, Pacey 4-1s, Lukey 3", 3.91:1, auto. Tuned by me w/Quarterhorse and BinaryEditor. Coming Soon: Ported lower intake, Tickford "Premium" Brakes, and a good wash. |
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06-11-2005, 01:37 PM
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#10 | ||
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Regular Member
Join Date: Aug 2005
Posts: 150
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Checked the diff oil and it looks and smells good and is right on the edge of the bolt hole as it should be. The noise could be the bearings.
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06-11-2005, 02:47 PM
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#11 | ||
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Join Date: Mar 2005
Posts: 5,954
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how would you go about checking your bearings?
is it an wasy job? might be a good idea to change mine as the car used to be used as a tow car for a 19 foot boat interstate by my old man, and always copped salt water up to its balls while launching the thing! |
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06-11-2005, 04:03 PM
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#12 | ||
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FF.Com.Au Hardcore
Join Date: Jan 2005
Posts: 1,861
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on the topic of diff's can anyone suggest a good oil for an AU XR with an IRS / LSD Diff?
Mine makes the occasional moan when cornering at low speeds and i doubt its been changes in 80k's |
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06-11-2005, 04:54 PM
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#13 | ||
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Back on the road
Join Date: Dec 2004
Location: Wollongong, NSW
Posts: 3,205
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I like Castrol SAF-XA, it was also used and recommended by the guy that rebuilt my diff. I am pretty sure the solid axle LSD in my ute would use the same oil as the IRS LSD?
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------------------------------------------------------------------------- AU XR8 Ute 13.90 @ 100mph - http://www.aufalcon.com/xr8ute 5L Windsor, GT40X heads, Crane 2030, Pacey 4-1s, Lukey 3", 3.91:1, auto. Tuned by me w/Quarterhorse and BinaryEditor. Coming Soon: Ported lower intake, Tickford "Premium" Brakes, and a good wash. |
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06-11-2005, 05:23 PM
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#14 | ||
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Brembo Lover
Join Date: Jan 2005
Location: Perth
Posts: 325
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Im going to change the diff oil in the fairlane (IRS, Open Wheeler) next weekend. How much of the oil does it take and what is recomended?
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Mine: 2007 BFII XR6 Turbo in Conquer with Sunroof, BFII Typhoon rims, CarPC, FPV Leather Wheel Hers: 2006 BF Super Pursuit in Vixen |
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Diff Oil Change
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