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Old 03-16-2013, 04:15 PM   #1
Ethanwrxwagon
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Join Date: Jan 2011
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Location: cheyenne, wy
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2005 wrx wagon

Default 4EAT 4.11 Front diff into 5MT

I drive an 05 4EAT WRX, i just purchased a 02 WRX 5MT with blown second and plan on buying a LGT gearset rebuild kit for 02 WRX to put in.

My question is with having 4.11 final drives in the 4EAT and a 3.90 front diff in the 5MT is it possible to pull the 4EAT 4.11 and put it in the 5MT? i dont know yet if ill need a new Cluster shaft for the LGT kit or not (i would assume i would)

IIRC LGT's final drive is 4.111 would that clustershaft mesh properly to a 4.11?


I looked at the stickies and couldnt find what i was looking for.
Excuse my ignorance.
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Old 03-16-2013, 04:33 PM   #2
ballitch
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Wrx Tranny,slowr than ish

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Only problem is you would have to also swap out the transfer gears on the tail end of the tranny. The 02-05 wrx 5 speed has a 1.1:1 transfer gear set just before the rear driveshaft. Which is why the rear diff is a 3.545 ratio and the front is a 3.90


~Josh~
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Old 03-16-2013, 05:45 PM   #3
Ethanwrxwagon
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but would i have to find a different driveshaft? i dont have any of the extension/tail housings or any of their guts so that would be fine.

youre saying i would have to get an LGT's transfer gears?
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Old 03-16-2013, 08:39 PM   #4
subi400
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Quote:
Originally Posted by Ethanwrxwagon View Post
but would i have to find a different driveshaft? i dont have any of the extension/tail housings or any of their guts so that would be fine.

youre saying i would have to get an LGT's transfer gears?
He is saying that you would have to get the transfer gears from a tranny tail section that has a 1:1 so you can have the 4.11 front and rear diff ratio.

The auto drive shaft is shorter than a manual one so you will have to find a manual drive shaft.
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Old 03-16-2013, 08:51 PM   #5
Ethanwrxwagon
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I know i need another drive shaft. What cars used the 1:1 transfer gears? Legacy? So just get an LGT cluster shaft and transfer gears and i should be good?
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