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Old 06-25-2013, 11:34 AM   #1
skep18
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Member#: 214971
Join Date: Jun 2009
Chapter/Region: South East
Location: TN
Vehicle:
2014 WRX
DGM

Default Driveshaft Proper Seat into 6MT

Odd question here, but I'm messing with my head thinking about it. I am installing an STI 6 speed into an older GC chassis. Then installing the forward portion of the driveshaft into the transmission, it can go all the way forward until it feels like it hits something, preventing any further forward movement. However, when I go to install the carrier bearing on the driveshaft along with the 4 bolts connecting it to the rear half, it recesses aft just a little bit, like 1mm...

This has me primarily concerned about potentially leaking transmission fluid as I believe there may be a seal there that it needs to contact? Possibly less so, if there is some need for full contact on those splines that I'm not getting, thats also in my mind.

Anyone have experience with this? Is there supposed to be some wiggle room there? I have worked on my non-swapped WRX before in reinstalling the driveshaft, but I don't remember if I had the same situation as I just trusted everything fit together since it was all stock.
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Old 06-25-2013, 11:44 AM   #2
skep18
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Join Date: Jun 2009
Chapter/Region: South East
Location: TN
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2014 WRX
DGM

Default

Did some searching and found a few photos that may explain my situation and put me at some ease. Seems like others are having varying depths of driveshaft forward whatever as well...







Granted, this could be due to aftermarket driveshafts, but given the U-joints in the system, I would suspect the configuration should allow some variances of depth during operation. Perhapt the seal is a radial one rather than an axial interface?

EDIT: After looking some more, seems the only/main seal is the radial seal that mates to the smooth portion of the OD on the front of the shaft. Also, 98% of the splines should still be in the same contact, so I don't suppose I should have an issue. I will update when I start up and run it, just for posterity's sake.

Last edited by skep18; 06-25-2013 at 12:21 PM.
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Old 07-14-2013, 01:29 PM   #3
fr0st_wrx
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Chapter/Region: BAIC
Location: 209//Norcal
Vehicle:
2006 WRX
OBP

Default

Thats normal, you dont want it to sit all the way against the tail end of the trans because it spins. As long as it reaches the splines and isnt leaking fluid you're gtg.
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