StevenAU2

Just wondering if anyones done the swap from the stock 3.08:1 diff to the XR spec 3.45:1 with lsd??? If so where abouts in Sydney area??? Also what was involved to make the speedo read correctly.

dcflick

Have you read *************/body.php?p=Speedocalc ? This has a great caculator to work out speedo diferences relating to that work.
If I did that (put in a 3.45:1) and then went and got some fatter and wider tyres for the back (eg. 275/16/R16 up from stock 225/55/R16) would that be kosher? I have an AU S and I love my stock 16 rims. I don't even know if you can put bigger tyres on stock rims.

dcflick

the website I am trying to say is www . ford mods . com without spaces? I dunno why it is being blocked

JC-XR8

That would be because you are advertising a non-affiliated site, i guess. I doubt you wil fit 275s on a stock rim!

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AU1 XR8 Auto 147.9 rwkw (approx 215 fwkw)

AU2 Wagon HAD Auto
17s, Pacemakers, 3" Intake & Pod filter (The Family Hack)

Member of:
FPV-XR Club ACT
AUFalcon.com
ATPS (honorary)

ir33t

I was about to ask the exact same question.

I have been quoted $750 to put 3.45 gears in but i'm sure thats only for a single spinner, but. i've also heard that you can put a LSD hat into my normal housing is this true???

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AU Series 1 I6 Futura, 17" XR Series III Rims, Kings superlow springs and Bilstien shocks, K-MAC adjustable caber kit, xr8 snorkle, BMC Filter, EF a/box lid, custom storm water pipeing, pacemakers, h/flow cat, 2 1/2" zorst mandrel bent, dyno'd @ 117.2kwrw b4 bmc

FalKeen

how much would it affect your "off the line" speed?

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EFXR62

The XR spec diffs are quite good for take off, but some people say they can actually be too shorter ratio, as top speed is not as big.. But, saying that, going from a stock 3.08 (dad's car) to a 3.45 you do feel the difference..

WILD6

ive put the 3:45 gear and lsd in my AU and it improves take off slightly but not enough for my liking so ill be changing to 3:9's in the near future. also to get the speedo corrected i had to go to a local auto elec (melbourne) and get it corrected

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series3 xr8 5 speed manual, pacemaker extractors, hi flow cats, 3 inch exhaust, lowered cold air intake, k&n air filter, 3.9 diff gears
13.9584 @ 98.51 mph 1.9447 60 ft
188.9 rwkw 525 nm of torque

WBT56

You can get a speedo gear for anything up to 3.7 ratio. After that it has to be done electronically. Most cars won't go any better with lower than 3.45 without mods. Lsd can be stuck in while you are at it, housings are the same.

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If you're not driving a manual you're really just steering.

dcflick

I hear that you cant fix the speedo in an auto EF/ EL/AU unless you change the eec-v as they use vehicle speed instead of rpm as shift points