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#91 | |||
Starter Motor
Join Date: Sep 2015
Location: Canberra
Posts: 24
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#92 | ||
Regular Member
Join Date: Jun 2005
Location: Tweed Heads
Posts: 404
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Looking at putting 3.9s into my manual 01 xr8.
Obviously not something that I will do myself. Will go to a specialized shop on the GC looking at Nerang Diffs. But curious what causes some Diffs to become noisy after changing gearing. Unsure where I will get the gears from but am hoping Mal Wood still offers something that would suit. Besides finding the correct speedo gear what else will I need to have the job done or anything else that should be sorted while its opened up. Cheers.
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2001 AU2 220 XR8 - Build thread |
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#93 | |||
FF.Com.Au Hardcore
Join Date: Apr 2012
Location: Adelaide
Posts: 2,802
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Noisy diffs generally comes from re-using gear sets after a wear pattern is formed, it’s hard to replicate it. I had no noise in my 3.91 true trac and still don’t after some km. No speedo gear available for the 3.92 gear set; will need a 4 pin 12v speedo corrector that interrupts the VSS signal to cluster yet supplies the unmodified signal to the EECV.
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Current Car: 2002 AUII LTD 408ci Windsor, T6 S488, TH400, 2 Piece Shaft, Helicial LSD 3.23 IRS Daily: 1998 Mitsubishi Super VR-4 Legnum |
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#94 | ||
5.6L x 2 pilot
![]() ![]() Join Date: Dec 2009
Location: Canbra
Posts: 14,978
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Apologies. Thead mine of the decade.
Did any AU XR sedan come with a live axle? I thought the live V IRS was in this thread, but it is not. I am currently planning an upgrade for an AU2 Forte, so 3.08 be gone! Cheers Stu.
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2002 AU II LTD 5.6L 342ci T3 Short, AFR165 heads, Comp XE270HR-12 Cam, Brembo 4/4s(355/330), T3 5 spokes, LC-1 wideband, Whiteline HD swaybars, TCE 3K Hi Stall, PWR Auto Trans Cooler, Koni shocks, King Low Springs, Hurricane headers, 100 cpsi cats, Twin 2.5" exhaust. Quarter Mile: 13.73 @ 105.86mph Runner Up NA/DA to BF Fairlane/LTD Geelong AFD 2024 ![]() 2002 XR8 pursuit 250 Custom twin 2.5" exhaust w Herrod modifed extractors, Tuned with Moates QH
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#95 | ||
Sick Puppy
Join Date: Jul 2006
Posts: 1,963
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3.45 LSD centre from an IRS will go straight into a solid housing.
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#96 | ||
5.6L x 2 pilot
![]() ![]() Join Date: Dec 2009
Location: Canbra
Posts: 14,978
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Not into a 3.08 housing which my Forte currently has. They are quite visually different.
So I guess that leads to my next question. Where there any AU sedans with a live axle that was not a 3.08? Stu
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2002 AU II LTD 5.6L 342ci T3 Short, AFR165 heads, Comp XE270HR-12 Cam, Brembo 4/4s(355/330), T3 5 spokes, LC-1 wideband, Whiteline HD swaybars, TCE 3K Hi Stall, PWR Auto Trans Cooler, Koni shocks, King Low Springs, Hurricane headers, 100 cpsi cats, Twin 2.5" exhaust. Quarter Mile: 13.73 @ 105.86mph Runner Up NA/DA to BF Fairlane/LTD Geelong AFD 2024 ![]() 2002 XR8 pursuit 250 Custom twin 2.5" exhaust w Herrod modifed extractors, Tuned with Moates QH
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#98 | |||
FF.Com.Au Hardcore
Join Date: Jan 2005
Location: Wollongong
Posts: 3,111
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there are lots of factory ford ratios for live axles but all crap 3.08, 3.23, 3.28, 3.45... its not really worth the effort unless you can find a bolt in effort. go a 3.9 ratio, talk to a diff shop i went from 3.08 to 3.45 and i think it was 0.1s quicker to 100kmh
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CURRENT RIDES BA GT Mk1 #0009 - Narooma Blue SY Ghia AWD Black VZ LX8 Adventra Holden HX 50th Anniversary AU Saloon Car racecar 1980 GS1000ST - Wes Cooley Rep
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#99 | |||
Regular...with metamusal
![]() Join Date: Oct 2009
Location: Geeeloong
Posts: 6,389
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i have at least three 3.45 ratio AU diffs here that will fit any AU fitted with a solid diff. ![]() |
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