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Old 08-19-2015, 06:23 PM   #1
MaltachAE86
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Exclamation 06 wrx gear set with 03 diff

Ok so I have been looking for an answer to this question with no avail. I have a 2003 wrx and I finally blew my trans up. I have a 2006 wrx 5 speed with only 37k miles on it. Would I be able to use the gears out of the 06 5 speed in the 2003 casing and 2003 center differential? Only reason why I want to do this is so I can avoid buying a new slave, axles, diff etc.
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Old 08-20-2015, 12:08 PM   #2
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Yep as long as by "I" you mean a professional shop and not literally you.
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Old 08-20-2015, 03:31 PM   #3
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yes it will work because your centre differential you say seems fine which controls the rear differential. so you are good to use 06 speed gears in the gearbox. but use new seals all over.
the situation would be different if you used 06 wrx centre differential which means 06 rear differential it needs. i hope you understand that.
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Old 08-20-2015, 04:00 PM   #4
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A shop is doing it for me and yes, I just picked up all oem new seals and gaskets.
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Old 08-24-2015, 08:27 PM   #5
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Quote:
Originally Posted by coalslaw View Post
yes it will work because your centre differential you say seems fine which controls the rear differential. so you are good to use 06 speed gears in the gearbox. but use new seals all over.
the situation would be different if you used 06 wrx centre differential which means 06 rear differential it needs. i hope you understand that.
FORGET THIS POST AS IT IS TOTAL DRIVEL


this is one of the DUMBEST things ive seen posted in years

the differential cares not in the slightest what gear ratio is present or what the transfer gear ratios are

which are the IMPORTANT THINGS TO CONSIDER
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Old 08-25-2015, 12:20 AM   #6
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I figured none of that really made a difference. So this will work though correct Uncle Scotty?
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Old 08-25-2015, 12:22 PM   #7
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coalslaw had it close to correct (...it wasn't "total drivel"), but the transfer gearing is the critical part. This is located near the center differential. You need to re-use your original transfer gearing and it needs to match the rear differential you are using. As long as you use your original R160 and transfer gearset, you're golden.

If you don't have transfer gearing that matches the rear diff. you end up with a front to rear mismatch in wheel speed and a center differential constantly trying to 'fix' this. In other words, it will destroy the center diff. in no time.
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Old 08-25-2015, 10:30 PM   #8
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Quote:
Originally Posted by mrsaturn7085 View Post
coalslaw had it close to correct (...it wasn't "total drivel"), but the transfer gearing is the critical part. This is located near the center differential. You need to re-use your original transfer gearing and it needs to match the rear differential you are using. As long as you use your original R160 and transfer gearset, you're golden.

If you don't have transfer gearing that matches the rear diff. you end up with a front to rear mismatch in wheel speed and a center differential constantly trying to 'fix' this. In other words, it will destroy the center diff. in no time.


not even CLOSE

the CRITICAL part is knowing what the **** you are talking about

he did NOT
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Old 08-25-2015, 11:52 PM   #9
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I am using the 03 casing, center diff, rear diff and everything else. The only thing am using from the 2006 is the gears.
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Old 08-26-2015, 10:51 AM   #10
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You must have missed my post... I'll summarize:

You need to use the transfer gears from the '03.
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Old 08-26-2015, 01:20 PM   #11
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Just to make sure I understand this, the transfer gears are the gears and shaft next to the input shaft and next to the center diff correct?
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Old 08-26-2015, 01:27 PM   #12
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Yes.

I don't mean to sound condescending, but are you sure you're up to rebuilding the transmission? There's nothing wrong with being green and diving in, but I'd make sure you have all the tools, wear items, a FSM, and preferably, someone to check your work. It's not as complicated as a 6MT tranny, but you're gonna have a LOT of parts to keep track of.
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Old 08-26-2015, 01:50 PM   #13
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You don't sound conceded at all, no worries. I am not rebuilding the trans myself, a good buddy of mine that does nothing but subaru's is. I was just wanting to confirm everything would work before he got it all torn down. Thanks guys.
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Old 08-30-2015, 01:41 AM   #14
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Quote:
Originally Posted by Uncle Scotty View Post


not even CLOSE

the CRITICAL part is knowing what the **** you are talking about

he did NOT
Actually, Uncle scotty maybe making a point here. I'm not sure exactly what the centre diff ratio from 03 and 06 are. 1:1 or 0:1 or something like that. i guess at this point this is where the front and rear speeds are being distributed. if its wrong then yes it will eat the one another in no time. symptoms is loud r.diff whine, feeling of being locked out etc

I thought you could use 06 gearset by mix matching with 03 transfer gears and all the assembly that is with the 03 r. diff and it's FD. okay maybe i post out of my ass. but worth the idea to consider doublechecking.
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Old 08-30-2015, 06:28 AM   #15
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Quote:
Originally Posted by coalslaw View Post
Actually, Uncle scotty maybe making a point here. I'm not sure exactly what the centre diff ratio from 03 and 06 are. 1:1 or 0:1 or something like that. i guess at this point this is where the front and rear speeds are being distributed. if its wrong then yes it will eat the one another in no time. symptoms is loud r.diff whine, feeling of being locked out etc

I thought you could use 06 gearset by mix matching with 03 transfer gears and all the assembly that is with the 03 r. diff and it's FD. okay maybe i post out of my ass. but worth the idea to consider doublechecking.
THE POINT IS THAT the center diff has NO RATIO AT ALL


AND the rest of this is drivel


just don't post about any of this and we will all be better off
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Old 09-01-2015, 04:26 PM   #16
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It'll be fine as long as the shop transfers your front differential pinion off your old pinion shafts and puts it on your new pinions shaft. Use your old front differential ring and use your old transfers gears in the tail housing.
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Old 09-01-2015, 04:27 PM   #17
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Also center diff is the same
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