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changing diff ratios 

 

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 Post subject: changing diff ratios
Posted: Sun Apr 30, 2006 1:19 pm 
Parts Gopher
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hey guys

i got a ef gli falcon i6 auto and I was wondering what would be needed to go to lsd and a higher ratio eg. 3.45 instead of the factory 3.08.

thnax guys your help is a appreciated

 

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Posted: Sun Apr 30, 2006 2:44 pm 
Getting Side Ways
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easiest option (and probably cheapest) would be to pick up a 2nd hand EF XR6 diff.

You will also need the speedo sendo too.

 

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Posted: Sun Apr 30, 2006 2:52 pm 
Getting Side Ways
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speedo sender***

$16 from ford i think

If the diff doesnt have to be LSD then it will be cheaper to pick up a set of 3.45 diff gears, (either XR gears or VL commodore gears) and put them in your diff
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Posted: Sun Apr 30, 2006 11:45 pm 
Fordmods Newbie
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3.45 don't fit into 3.08 housings nicely, you really need to re shim the whole setup .. unless you know what your doing, not worth it, as above, buy a 3.45 LSD.

(altedxr6 under g/f account)

 

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Posted: Mon May 01, 2006 12:13 pm 
Getting Side Ways
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dont be a p***y, 3.45s are nearly enough...get some 3.70 or 3.89 or 4.11 from the R31 skylines/pinnys and whack them in an EA housing and chuck that under your car... i've done it! nice short gears...

 

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Posted: Mon May 01, 2006 6:49 pm 
Oompa Loompa
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i've got 3.91 and i'm really happy with them.
Boss diffs at lonsdale did them. top bloke.

JIM
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Posted: Wed May 03, 2006 2:43 pm 
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hey so which gives better acceleration vs topspeed? a 3.08 or say a 4.11?

the diff on my ute say 4.##... (bad memory :roll: ) but i neeeed better acceleration. :lol:
also how can you find out if the gearing inside the housing has been changed?

what are you hoping to get from the diff change 96_EFCaridinalRed?

 

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Posted: Wed May 03, 2006 6:39 pm 
Oompa Loompa
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jack up the rear of the car. turn the wheel once and see how many times the tail shaft turns. that the ratio. 3 turns of the tail shaft and one of the wheels. = 3:1 ratio.

4:11 would give better acc. but would hinder top end.

JIM
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