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Discussion Starter #1
Hey everyone im planning to change the gear ratios on my diff im currently got 3.45. at the moment but since my diff is screwed im planning to mess around and put something else,im thinking of going with 3.7 what do you guiys think i should go for ive got EA falcon i want faster take off speed.
 

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if you have an auto, i'd go 4.11 since everyone that has them is very happy.
otherwise if your manual go for something like 3.7 for orsm launches.
 

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Discussion Starter #3
Ive rang a few places about 4*11 and they say it kills your top end speed.I also heard it drinks fuel like nothing
 

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Discussion Starter #5
Yeah i do?? what you reckon should i just stick to the 3.7
 

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I agree with raven
 

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Change your transmission before your diff!

3.45s with a 3 speed auto would be bad enough regarding revs as is!
 

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I have 3.7s in my EB, behind a 4 speed, very nice.
going to swap the diff in2 my XF soon, which is running an EB 4.0 and T5, will let you know how that goes.
But yeah Id be tossing that 3spd if I where you.
 

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Your XF sounds awesome!

Got any more info on it?
 

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i wouldnt put 3.7's behind a 3 speed auto.

first up, 5 speed conversion, that will liven things up. then look at 3.9's.

also, you might want to look into fitting an EB centre and axles, as they are 28 spline and 4 pinion centres, as opposed to 25 spline and 2 pinion
 

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Ghia5L said:
Your XF sounds awesome!

Got any more info on it?
havnt you seen it before? Im not exactly new to the forums.
Send me a PM on what you would like to know, so this post doesnt get hijacked.

.....uummmm yeah gear ratios hey...
 
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