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The Pub For General Automotive Related Talk |
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#1 | ||
FF.Com.Au Hardcore
Join Date: Jan 2005
Posts: 2,728
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Hey guys
i currently have a 3:27LSD (or do i?) becuase so far all the people i talk to that have 3:27 sit inbetween 1900 and 2000 rpm in 5th at 100km/h, however , ive talked to other people with 3:45's and they sit on 2100rpm in 5th at 100km/h, and so do i, and my speedos not out i can gurantee u that, so, is there any real way of confirming, or is there someone out there that sits on 2100rpm in 5th on a 3:27?
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2015 FGX XR8 - 557rwkw on E85 KPM Street Fighter PCMTec Michelin Pilot Sport Cup 2 - 255/35/19 - 275/35/19 Shockworks Coilovers PITLANE AUTOMOTIVE & PERFORMANCE
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#2 | ||
Banned
Join Date: Jan 2005
Location: KNOX
Posts: 1,269
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Doesnt it actually say on the diff if u pull the wheel off?
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#3 | ||
owning V8=having no $$$
Join Date: Mar 2005
Location: Brisbane...
Posts: 1,717
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I'd imagine tyre size would have a bit to do with it??
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Weekends - 1965 XP 302 sedan... ![]() Weekdays - 1980 323 Mazdabator complete with cheese cutters & FF sticker :dr_Evil: The Reality: 13.1 @ 106mph.... The Goal: somehow get into the 12s!!! :sm_headba www.qldsuperkart.org |
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#4 | ||
Regular Member
Join Date: Dec 2005
Location: Perth WA
Posts: 387
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First - have a look around the bolts on the backplate of the rear axle centre housing - look for a tag on one of the bolts - it may have the ratio stamped on it (or dont they have that any more?).
Or - jack up rear axle - use axle stands. Chalk mark on tyre at 6 o'clock with something (eg a brick) next to the tyre to line up with that chalk mark. Under the car - put a chalk mark on the tailshaft flange and a mark next to it on the diff housing to line up with that mark. Now get someone to turn the wheel exactly one turn (slowly) and count the turns of the tailshaft. If it goes about a quarter turn past the mark (3 1/4 turns) then its 3.27. If it goes nearly half a turn past the mark (3 1/2 turns) then its 3.45. Thats the only way to know for sure. (This only works with LSD as both rear wheels are turning together - otherwise you need to turn both wheels one full turn at the same time) No, its not an April Fools joke to get you under the car! BTW, the difference between the two ratios (mathematically) is about 110 rpm at 2000 rpm - so you are on the right track. Cheers.
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1967 XR 289 V8 Falcon (1st) - 1973 XLE 250 4spd Cortina (2nd) 1987 XF GL 4.1 Dual-Fuel Falcon (3rd) - 1996 EF 4.0 GLI Falcon (4th) 2003 BA 4.0 LPG Falcon Wagon (5th) 2016 SZ Territory TX 4.0 Petrol (6th & last?)(Sadly, written off) 2004 WRX (Retirement Toy) |
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