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3.7 or 3.45 diff ratios 

 

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Posted: Wed Mar 21, 2007 9:09 am 
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You dont have to change it but yes your speedo will be out, when I went to 4.11's mine at 80 reads 110, at 100 reads 140, you get used to it but for the cost of the gear just find the right one and do a swap.


ebfairmont3.9 im thinking in the next car to get built going for more than 4.11 maybe something like 4.3

 

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Posted: Wed Mar 21, 2007 7:31 pm 
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With a T5 manual (not an EA box).
With 4.11's it should sit on 2,500rpm at 100km/h.
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Posted: Wed Mar 21, 2007 8:22 pm 
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EL XR8 wrote:
With a T5 manual (not an EA box).
With 4.11's it should sit on 2,500rpm at 100km/h.

4.11s for the win, anyone who has a 4.11 diff sitting around should just man up and put it in :P

 

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Posted: Wed Mar 21, 2007 8:53 pm 
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Hahaha.
Yeah i reckon they should, if their mates would get of their asses, and help...
Just talked yourself into more work on the XR, you silly silly boy!
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Posted: Wed Mar 21, 2007 10:32 pm 
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So anyone know where to source the 4.11s or 3.7s from

 

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Posted: Wed Mar 21, 2007 11:12 pm 
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ok who can tell me what ratios came out in the r31 skyline

 

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Posted: Thu Mar 22, 2007 7:20 am 
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I just went to preston auto and they hooked me up with 9" 4.11 and LSD for under a grand.

 

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Posted: Thu Mar 22, 2007 9:12 am 
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auto skylines 4.11
manual skylines 3.7

 

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Posted: Thu Mar 22, 2007 12:04 pm 
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just got told a guy has 1 from a manual ses its 3.11 ?

 

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Posted: Thu Mar 22, 2007 12:44 pm 
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just figerd out i got 3.08 in mine thats bad so dose anyone know if this manual r31 diff is going to be 3.11 or 3.7

 

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Posted: Thu Mar 22, 2007 1:12 pm 
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pintaras have 4.11's

manual skylines have 3.7

auto skylines have 3.89

r31's this is

 

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Posted: Thu Mar 22, 2007 1:20 pm 
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ok cool thanks

 

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Posted: Thu Mar 22, 2007 1:22 pm 
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so i just change the center and pinion over as the skyline diff looks slightly diff ?

 

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Posted: Thu Mar 22, 2007 6:06 pm 
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And Leyland P76 in I6 had 3.90 diff gears.

 

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Posted: Fri Mar 23, 2007 3:36 pm 
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Hi just wondering if anyone could give me the names of a few companies that would have gear sets for a lsd in a eb xr6 in ratios 3.7 or 3.9 that are in nsw thanks as every company i talk to say they only stock 9inch centres thanks.

 

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