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Old 03-17-2018, 11:07 AM   #1
BrandonBailey
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Default 2005 WRX 4.11 trans/diff swap HELP!

Alright, I just finished my swap of a 01-03 jdm legacy trans(ends in bbba) into my 05 WRX. It is a 4.11 trans and 4.11 diff, I used my stock 5-speed manual driveshaft. when inserting the driveshaft into the transmission it went all the way in, but when bolting the two middle bolts to the body it pulls in back out of the trans about half an inch or more. Everything I read stated that the oem ds would work. Bolts up to the diff just fine. I drove it briefly and as I thought it was too far out, and leaks fluid, but theres no way to get it in further. Can anyone point me to the right driveshaft? Thank you
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Old 03-17-2018, 07:33 PM   #2
BrandonBailey
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Bump, anyone know what diff from which car will work? I have been searching for a few hours on here and google and can't find anything specific to my year(05 usdm wrx limited). I saw a 02 that did the swap using the stock driveshaft, but that didn't work for me. I was thinking maybe the legacy ds would work? I also read that the auto wrx was used in either a 4.11 or 4.44 jdm swap on an 04(I've read through so many I don't remember for sure what ratio it was). Anyway I'm just rambling at this point. Frustrated and can't find anything definitive as to what part I need for the car, any help is greatly appreciated.
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Old 03-17-2018, 08:58 PM   #3
Charlie-III
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Did you go from a MT to a MT?
I believe the DS's are different lengths for AT's vs. MT's.
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Old 03-17-2018, 09:15 PM   #4
BrandonBailey
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Yes my car was originally a 5-speed manual, and the trans I swapped in is also a 5-speed manual. And yeah thats what I have read is that their different lengths, but I can't find out what driveshaft I need to get. It seems that mine is too short, so maybe i need an auto wrx? I'm just lost on this
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Old 03-18-2018, 09:35 AM   #5
Charlie-III
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How about looking up DS's at RockAuto or similar? A lot of times they give dimensions and specs like spline count. That may tell you what to look for used.
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Old 03-18-2018, 09:36 AM   #6
BrandonBailey
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Bump for help. This is my daily I really need it up asap. Anyone who knows anything about which driveshaft will work with the 4.11 trans - 4.11 diff in a 05 wrx please chime in.
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Old 03-18-2018, 09:40 AM   #7
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Yeah I may just pull my driveshaft later today and measure it, then order one thats an inch longer, but I really wanted someone with personal experience on a swap similar to confirm which one will work.
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Old 03-18-2018, 11:35 AM   #8
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PM'd you with a response to your question
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Old 03-18-2018, 11:37 AM   #9
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Quote:
Originally Posted by Charlie-III View Post
Did you go from a MT to a MT?
I believe the DS's are different lengths for AT's vs. MT's.
True - AT driveshafts are different lengths than the MT driveshafts, when you are talking 5MTs. This is why people can use an AT driveshaft when swapping to a 6MT. The 6MT driveshafts and the AT driveshafts are the same, or near the same length.

I think what he is ultimately getting at is his seal is leaking, and it needs to be replaced.
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Old 03-18-2018, 05:11 PM   #10
Charlie-III
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Quote:
Originally Posted by Samurai Jack View Post
True - AT driveshafts are different lengths than the MT driveshafts, when you are talking 5MTs. This is why people can use an AT driveshaft when swapping to a 6MT. The 6MT driveshafts and the AT driveshafts are the same, or near the same length.

I think what he is ultimately getting at is his seal is leaking, and it needs to be replaced.
Yes, we all agree the rear trans seal is leaking.
Question is.......in this application, is the DS he is using too short leading to a rear trans seal leak?

Neither of us are there, we are relying on the OP.
I am just giving a direction to him to help him resolve his own issue.
Hopefully he closes out this thread with a resolution.....
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Old 03-18-2018, 05:28 PM   #11
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Quote:
Originally Posted by Charlie-III View Post
Yes, we all agree the rear trans seal is leaking.
Question is.......in this application, is the DS he is using too short leading to a rear trans seal leak?

Neither of us are there, we are relying on the OP.
I am just giving a direction to him to help him resolve his own issue.
Hopefully he closes out this thread with a resolution.....
I appreciate the input guys, after reading Samurai Jack's pm I think it may be just that seal. I always thought that the DS needed to be all the way in to seal. It's not hanging out or anything its still in there. But it does have to be pulled back out a little for the middle bolts to line up with the holes on the car. I just originally assumed that it was a little short. The seal looked very good though when installing the DS. I had actually made a comment about how it looked damn good to a friend standing around the car while I was working on installing the trans. But I will be going into my local Subaru tomorrow to get the seal and replace it. I will update tomorrow night if this fixed my problem or not(as long as the seal is in stock that is). Thanks again to you and Samurai Jack
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Old 03-18-2018, 09:28 PM   #12
Charlie-III
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Don't forget to lube the new seal when installing.
A thin smear on the OD as well as on the ID where it contacts the DS. Wheel bearing grease is fine.
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Old 03-18-2018, 11:17 PM   #13
rusche
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Is there any play in the shifter? Or does it feel totally stuck?
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Old 03-18-2018, 11:35 PM   #14
BrandonBailey
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Originally Posted by rusche View Post
Is there any play in the shifter? Or does it feel totally stuck?
No my shifter is perfectly fine, it was just a leak from where the DS enters the rear of the trans. While I drove it(very briefly because I had my suspicions) it shifted like butter and felt great.
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Old 03-19-2018, 08:31 PM   #15
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Default Found the fix

Alright so I just finished the install of the new seal for the output shaft of the trans. It seems that all is well! Let it warm up about 10 minutes before driving, drove for 15 min, came back, jacked it up and no fluid from where the ds goes in. Checked fluid level and there's no change.

Just for reference Ill state what was done to the car swap wise.

2005 WRX 5-Speed
Swapped in a 03 MY JDM Legacy turbo 5-Speed trans(4.11), with a 4.11 rear diff.
Used the OEM 05 WRX Driveshaft, bolts up just fine.
My car had the male to male axles so I did switch to the male to female axles from a 03 legacy because this trans has stubs for the front.
Put in a new OEM Subaru WRX flywheel(with pilot bearing), and a Competition stage 2 clutch kit.
Other than that everything else stayed the same, rear axles were good so they were reused.

Thanks again to all who contributed

Last edited by BrandonBailey; 03-19-2018 at 11:38 PM.
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Old 03-20-2018, 12:42 AM   #16
Charlie-III
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Hey, congrats.
Also, thanks for closing this out, I hate dead end threads.
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Old 03-25-2018, 06:45 PM   #17
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Default 2004 legacy 5spd

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Originally Posted by Charlie-III View Post
Hey, congrats.
Also, thanks for closing this out, I hate dead end threads.
Never posted anything here begore.
Not sure this is correct place for this but kind of simmilar. And couldn't find anything that sounded closer. My profile says Scooba newbie. Or something like that. Not sure that's accurate. I've owned a few. Worked on many. Had 93 legacy wagon that took me to work every day and to many places and back that it should have never been able to. And that was before I lifted it 4 1/2 inches and added some mud treads off my old truck. Didn't use one of those kits. They cost money and wouldn't have worked anyway. Fabed a rear crossmember to replace the rusted one. After rebuilding the rear strut towers. I swapped the struts and mount with some that I think came from an intrepid. Bolted right in (with some modifications). Also had to modify the trailing arm mounts to keep suspension geometry somewhere near correct. Turned out better than I expected. Drove about same as original. And much better than with rear diff strapped up over spare tire with a ratchet strap. (Had to make it home somehow. ) Front had modified struts and mounts off something. Tires hit the spring mount on originals. Was geared too high for the bigger tires. And couldn't find source for anytime lower. So when the water pump failed and timing belt went, that was it. And It sounded pretty wild with no converter and straight pipes. Anyway, that's not what I'm here for. So let me try to stay on topic.,😞
I'm considering a 2004 legacy 35th Anniversary Edition sedan. With a 2.5 5spd. Not seen it yet. But thinking it has bad Center diff. Anyone know if the center diff from a 96 2.2 outback wagon 5spd will work in the 04 trans. Trying to look it up was not working very well. I've got the old trans from my 96 outback which had a broken shift fork that had a good diff. I need to find out before I buy it. Because if it won't work I'll pass. Thinking head gasket probably bad. Says it overheats sometimes. But like said haven't seen it yet. Nor could the owner give me any use able info. Hopefully it won't be. Seen quite a few that was just deteriorated radiator fill neck letting coolant out. A little rtv when putting cap on usually takes care of that. But if I'm going to have to buy a center diff and do head gaskets. It's in good shape and priced right but not that right. Any info would be greatly appreciated.
Also he said it is leaking gear lube. Somewhere in the front. Wasn't doing it until it started jerking and poping when turning right from a stop. Is there a common issue that could cause this leak? Maybe from continued driving with a bad diff? Damaged Trans case or something?

Last edited by blklstd; 03-25-2018 at 11:21 PM. Reason: Forgot something
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Old 03-27-2018, 02:50 PM   #18
BrandonBailey
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Quote:
Originally Posted by blklstd View Post
Never posted anything here begore.
Not sure this is correct place for this but kind of simmilar. And couldn't find anything that sounded closer. My profile says Scooba newbie. Or something like that. Not sure that's accurate. I've owned a few. Worked on many. Had 93 legacy wagon that took me to work every day and to many places and back that it should have never been able to. And that was before I lifted it 4 1/2 inches and added some mud treads off my old truck. Didn't use one of those kits. They cost money and wouldn't have worked anyway. Fabed a rear crossmember to replace the rusted one. After rebuilding the rear strut towers. I swapped the struts and mount with some that I think came from an intrepid. Bolted right in (with some modifications). Also had to modify the trailing arm mounts to keep suspension geometry somewhere near correct. Turned out better than I expected. Drove about same as original. And much better than with rear diff strapped up over spare tire with a ratchet strap. (Had to make it home somehow. ) Front had modified struts and mounts off something. Tires hit the spring mount on originals. Was geared too high for the bigger tires. And couldn't find source for anytime lower. So when the water pump failed and timing belt went, that was it. And It sounded pretty wild with no converter and straight pipes. Anyway, that's not what I'm here for. So let me try to stay on topic.,��
I'm considering a 2004 legacy 35th Anniversary Edition sedan. With a 2.5 5spd. Not seen it yet. But thinking it has bad Center diff. Anyone know if the center diff from a 96 2.2 outback wagon 5spd will work in the 04 trans. Trying to look it up was not working very well. I've got the old trans from my 96 outback which had a broken shift fork that had a good diff. I need to find out before I buy it. Because if it won't work I'll pass. Thinking head gasket probably bad. Says it overheats sometimes. But like said haven't seen it yet. Nor could the owner give me any use able info. Hopefully it won't be. Seen quite a few that was just deteriorated radiator fill neck letting coolant out. A little rtv when putting cap on usually takes care of that. But if I'm going to have to buy a center diff and do head gaskets. It's in good shape and priced right but not that right. Any info would be greatly appreciated.
Also he said it is leaking gear lube. Somewhere in the front. Wasn't doing it until it started jerking and poping when turning right from a stop. Is there a common issue that could cause this leak? Maybe from continued driving with a bad diff? Damaged Trans case or something?
Hey man the first section of your post sounds like it was a fun project! On the jerking when turning right I'm no expert but from reading around a lot recently, it kind of sounds like torque bind. Maybe running mismatched tires, tire pressure, tire tread life or all of the above? That would be the easiest solution to that, I know there's a handful of other things that can cause jerking. I don't personally have any experience with center diff compatibility outside of the 02-05 wrx center diffs. Hopefully someone with more experience on trans internal swaps can chime in and help you out
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Old 03-28-2018, 01:55 PM   #19
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Quote:
Originally Posted by blklstd View Post
Also he said it is leaking gear lube. Somewhere in the front. Wasn't doing it until it started jerking and poping when turning right from a stop. Is there a common issue that could cause this leak? Maybe from continued driving with a bad diff? Damaged Trans case or something?
Sounds like a bad center diff to me. I've had a few go out on me. The leaking gear oil could be from the input shaft seal. I've also seen gear oil leak from the axle seals, and also where the case bolts go through the housing.

The center diff can just go bad, or the snap ring that is on the center diff can come loose and munch the transfer gears.

Quote:
Originally Posted by BrandonBailey View Post
On the jerking when turning right I'm no expert but from reading around a lot recently, it kind of sounds like torque bind. I don't personally have any experience with center diff compatibility outside of the 02-05 wrx center diffs.
Torque bind only occurs on 4EAT or other automatic transmissions.

From what I have gathered all the 5MT center diffs are the same and interchangeable. The last one I installed was about $500 from Amazon. You can get aftermarket center diffs if one is doing rally racing or something similar but they are about $1200+.

Edit: When I say all I mean most if not all non DCCD 5MT center diffs.

Last edited by monkeyposeur; 03-29-2018 at 12:31 AM.
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Old 03-29-2018, 01:08 PM   #20
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Originally Posted by monkeyposeur View Post
Sounds like a bad center diff to me. I've had a few go out on me. The leaking gear oil could be from the input shaft seal. I've also seen gear oil leak from the axle seals, and also where the case bolts go through the housing.

The center diff can just go bad, or the snap ring that is on the center diff can come loose and munch the transfer gears.



Torque bind only occurs on 4EAT or other automatic transmissions.

From what I have gathered all the 5MT center diffs are the same and interchangeable. The last one I installed was about $500 from Amazon. You can get aftermarket center diffs if one is doing rally racing or something similar but they are about $1200+.

Edit: When I say all I mean most if not all non DCCD 5MT center diffs.
Thank you for chiming in on that and correcting me. I had been reading so much I'm not surprised I mixed up some information. I have had 2 center diffs go out, 1 was my stock 05 wrx trans, but it never jerked like that. My second in my 4.11 trans didn't jerk either. Do you think maybe that's just because of the way they broke as you were describing above?
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Old 03-30-2018, 12:03 AM   #21
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Not sure. Both center diffs I have had go out popped and jerked when turning. The first one that went out started made a horrible scraping noise that progressively got worse and started to pop and jerk rather violently. The second center diff I had go out only popped and jerked once the gear oil got hot, and the snap ring stayed in place.

What were the symptoms you experienced when your's went out?
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