Subaru Outback Forums banner
1 - 20 of 50 Posts

·
Registered
2007 Outback XT Limited - JDM Spec.b 6mt
Joined
·
19 Posts
Discussion Starter · #1 · (Edited)
Hey guys.
I’m not so new to Subaru but new to the forum. I’m at the point of my journey where I have realized how much of a lego box subarus are (Maybe why we like them so much, eh? 🤔😂) To reiterate from my introductory post; I’m getting ready to swap my xt with a 6mt/R180 3.9FD from a JDM MY07 Spec.B (trans code; TY856WBDAD). I’ve gathered a lot of my info about the trans from the rallispec 6mt pdf.

I have read the 6mt master swap thread at the sister forum of here too and I’m still as confused as ever. So, I’m here for assistance 😂
I have the transmission, shifter, diff, act sb10-xtss clutch/flywheel and axles. I know I can use a spec.b 6mt driveshaft (I think, I’m not sure about the wheelbase difference if any?) and I know 100% the 4eat driveshaft is a direct fit, length and spline wise. Am I correct in understanding that the 4eat outback driveshaft will need to have an r180 flange put on - or does the diff flange the one that needs swapped (but I already have the r180)? I’m confused with the conflicting info from usdm to jdm so I apologize if this is asked elsewhere as well.

the USDM part # for the prop shaft for the same year spec b is 27111AG05A - is that the same? It cross references to Dorman at 63.125” but driveshaftshop is telling me that there’s is 1/4” longer (so, 63.375”)? I read on page (...?) 95 of the 6mt swap that it’s only 58.5(?) roughly? I don’t know haha. I have read so much about this that I think everything is just twisted at this point

Also here’s some pics. If you see something that isn’t there that I will need, please let me know - by no means will I be offended. Any recommendations or information is greatly appreciated.

Thank you ahead of time! 🙂

503051
503052
503053
503054
503055
503056
503057
503058
 

·
Registered
05 GT wagon, 09 Spec B, 18 3.6R Outback
Joined
·
1,317 Posts
I know the carrier bearing for a outback is taller then a Legacy. So that may be an issue unless you have a 4eat shaft from an Outback...?

If you need to buy a propeller shaft, I have had great customer service from https://driveshaftstore.com/
there shafts have replaceable U joints.
 
  • Like
Reactions: LBHobxt

·
Registered
Outback 2.0XT, Audi TTq, Ducati M750
Joined
·
333 Posts
You'll also need to use half the auto mount and half the manual mount (crossmember), and weld in a plate between them to connect the two. I didn't end up doing this swap, but its not some awful task, there are some pictures of the DIY hybrid crossmember trans mounts online.
 

·
Registered
2008 OB 3.0R 6MT 2020 Kia Niro EV
Joined
·
150 Posts
Welcome to the forum! I saw that tranny package disappear and wondered where it went... Are you starting from 5MT or 5AT? If you're doing 5AT I might want to share helpful information. I'm swapping a 3.0R 5EAT to 6MT in a few weeks.

I believe the JDM LGT Spec B R180 rear diff is a standard R180 diff with an R160 yolk on it for the spec b drive shaft. You'd have to verify that...

Cheers,
Peter
 

·
Registered
2008 Subaru Outback XT
Joined
·
32 Posts
My '08 has this swap in it but I bought it that way so can't really offer up any technical knowledge. I can take pictures of anything you want if that will help though.
 

·
Registered
2007 Outback XT Limited - JDM Spec.b 6mt
Joined
·
19 Posts
Discussion Starter · #7 ·
I know the carrier bearing for a outback is taller then a Legacy. So that may be an issue unless you have a 4eat shaft from an Outback...?

If you need to buy a propeller shaft, I have had great customer service from https://driveshaftstore.com/
there shafts have replaceable U joints.
Yes. The 4eat outback/legacy prop shaft is the one I meant. I will probably give them a call in the morning. Thank you!

Just went to the site, they also make just the carrier bearing too, but I assume you need there shaft for that...

hrm.. okay. I’ll ask about that, thanks!

You'll also need to use half the auto mount and half the manual mount (crossmember), and weld in a plate between them to connect the two. I didn't end up doing this swap, but its not some awful task, there are some pictures of the DIY hybrid crossmember trans mounts online.
Ahhhh! I didn’t even consider that. Haha. I do have the Perrin trans Mount but I know that it’s sandwiched between the trans and crossmember. If I end up getting a used shaft, I’ll just pick up a trans Mount too. Thank you!

Welcome to the forum! I saw that tranny package disappear and wondered where it went... Are you starting from 5MT or 5AT? If you're doing 5AT I might want to share helpful information. I'm swapping a 3.0R 5EAT to 6MT in a few weeks.

I believe the JDM LGT Spec B R180 rear diff is a standard R180 diff with an R160 yolk on it for the spec b drive shaft. You'd have to verify that...

Cheers,
Peter
Hi Peter! GlobalJDMautoparts? Hahaha. I’m sorry if I snagged it from you! Fortunately, I’m starting with a 5mt as the car sits currently. I will see if I can’t cross reference the part numbers for the yoke to see about that. I appreciate you!

My '08 has this swap in it but I bought it that way so can't really offer up any technical knowledge. I can take pictures of anything you want if that will help though.
Ooooo! You rock, thank you! That will def help. The only pic I could think of that would help is a measurement of your driveshaft but that’s more work than I’m comfortable asking about haha. A reg pic of the driveshaft might work though. I don’t want ya to have to put it in the air or anything extravagant like that. I’m just thinking there might be a p# on it but the chances of that might be too slim.
 

·
Registered
2008 Subaru Outback XT
Joined
·
32 Posts
Ooooo! You rock, thank you! That will def help. The only pic I could think of that would help is a measurement of your driveshaft but that’s more work than I’m comfortable asking about haha. A reg pic of the driveshaft might work though. I don’t want ya to have to put it in the air or anything extravagant like that. I’m just thinking there might be a p# on it but the chances of that might be too slim.
Driving the car up on ramps and crawling under it isn't that hard and I may learn something here too. I'll see what kind of measurements and part numbers I can off of the driveshaft get without dropping the heat shield.
I'll also add that I don't remember any of my trans crossmember/mount looking like it had been welded on so I'll put up a pic of that as well.
 

·
Registered
2008 OB 3.0R 6MT 2020 Kia Niro EV
Joined
·
150 Posts

·
Registered
2007 Outback XT Limited - JDM Spec.b 6mt
Joined
·
19 Posts
Discussion Starter · #10 ·
Driving the car up on ramps and crawling under it isn't that hard and I may learn something here too. I'll see what kind of measurements and part numbers I can off of the driveshaft get without dropping the heat shield.
I'll also add that I don't remember any of my trans crossmember/mount looking like it had been welded on so I'll put up a pic of that as well.
Check out post #69 here. This is what others have used for an AT to MT fabrication. If your mounts are the same between 5MT and 6MT the mount should work, otherwise this is the common solution since the hull has different weldment locations.

Both of you are awesome! Thank you times a million. I’m gonna go check that thread out and giving the driveshaftstore a call here shortly.
 

·
Registered
2007 Outback XT Limited - JDM Spec.b 6mt
Joined
·
19 Posts
Discussion Starter · #11 ·
So, that was a really short phone call to the driveshaft store. The gentleman I spoke to pretty much refused to listen to how I came about my measurements regarding the length of the driveshaft as stated in my original post here. Which, I understand, the easiest thing for them is to have me install the transmission and diff and get them "A, B and C" measurements. However, he didn't want to hear that I can't do that because we're not doing my swap at my home for my car to wait for a driveshaft. He wouldn't even give me their measurements to compare them myself - nor listen to what I even had to say. I politely told him if he wasn't going to listen to my explanation and was going to keep interrupting me that I was going to end the phone call - which he agreed to 🙄😒 I wonder if it's because I'm a WoMaN or I couldn't have possibly done hours upon hours of research on this myself. 😒

If anyone can please take a look at their part number 26162 and let me know if that is the correct one? I'm fully prepared to just figure this out on my own at this point as that's how I've been treated at not one, but two driveshaft places.
 

·
Registered
2008 Subaru Outback XT
Joined
·
32 Posts
Here's the crossmember in my car. No welding anywhere. My car was originally a manual so, wondering if the hybrid crossmember is only needed if swapping from an automatic?
503177

Couldn't find any part numbers on the DS but took pics and measurements:
Trans end:
503178

Front of carrier bearing. From the red arrow to the center of the front U-joint is 20 1/4".
503179

Diff end:
503180

Rear of center bearing. Red arrow to center of rear U-joint is 30 3/8".
503181
 

·
Registered
2007 Outback XT Limited - JDM Spec.b 6mt
Joined
·
19 Posts
Discussion Starter · #13 · (Edited)
Thankyou Ahaze! Per your measurements, it's probably safe to assume that it's around 50-59" in total length? That could mean;
this one is a direct fit @ 58.5"?

Dorman states their OBXT manual DS (936-950) is 65.5" and the OBXT 4eat DS (936-947) is 62.875". SO strange because the driveshaftshop (not store) said their was 63.375" (SUSH17-C)

Interesting.. :unsure:
 

·
Registered
2007 Outback XT Limited - JDM Spec.b 6mt
Joined
·
19 Posts
Discussion Starter · #14 ·
As far as legacy measurements go, dorman doesn't have a measurement for the 6sp but the 4eat/5mt (936-954) is exactly 58.5" and another with fitment for the 4eat (936-956) only is 63.125.
 

·
Registered
2008 Subaru Outback XT
Joined
·
32 Posts
Thankyou Ahaze! Per your measurements, it's probably safe to assume that it's around 50-59" in total length? That could mean;
this one is a direct fit @ 58.5"?

Dorman states their OBXT manual DS (936-950) is 65.5" and the OBXT 4eat DS (936-947) is 62.875". SO strange because the driveshaftshop (not store) said their was 63.375" (SUSH17-C)

Interesting.. :unsure:
Tough to get an exact measurement but the U-joint centerlines are around 56" apart.
 

·
Registered
2007 Outback XT Limited - JDM Spec.b 6mt
Joined
·
19 Posts
Discussion Starter · #16 ·
Tough to get an exact measurement but the U-joint centerlines are around 56" apart.
Thank you!
I’ve also been thinking about it. I’m gonna experiment a little tomorrow too, “just to see”. I’m wondering if subtracting the length of the transmission from the axle input to the base of the output shaft and the axle input on the diff to the flange from the wheelbase would give the same number. Either way, I’ll post my findings for future readers if they happen to find this thread. I’m still most likely going to snag the 4eat prop shaft from a legacy sedan. I’ll update as needed. Thank you again to everyone for your help!
 

·
Registered
05 GT wagon, 09 Spec B, 18 3.6R Outback
Joined
·
1,317 Posts
I'm no expert on doing this swap but from what I recall reading on the legacygt.com thread about doing this 6mt into this body you use the 4eat propeller shaft. I thought I read that some place. Again, I have not done this swap.

May be go over the thread, https://legacygt.com/forums/showthread.php/6mt-master-swap-thread-107137.html and see what propeller shaft they use.

I would assume for the Outback you would use the Outback 4eat shaft (?)


I do know the Outback carrier bearing is taller then the carrier bearing for a Legacy.
 
  • Like
Reactions: LBHobxt

·
Registered
05 GT wagon, 09 Spec B, 18 3.6R Outback
Joined
·
1,317 Posts
  • Like
Reactions: LBHobxt

·
Registered
2007 Outback XT Limited - JDM Spec.b 6mt
Joined
·
19 Posts
Discussion Starter · #19 ·
Hi, Max! Yes, the first one in your link list for the 09 legacy, p# 26162, I'm thinking is the proper one. My conundrum falls in posts 11, 13 and 14 as far as the proper length goes. Tbh, I'm still learning the awd system to a fault.. is the carrier bearing at the midpoint of the DS? How would the two make a difference if it's a while new trans/diff set up? I'm not familiar with seeing anyone having to swap them but I could be wrong.
 

·
Registered
05 GT wagon, 09 Spec B, 18 3.6R Outback
Joined
·
1,317 Posts
Yes, the carrier bearing is that center connection. It's popular and a lot of vehicles. My 1986 Ford F150 has one.

I know the difference between the Outback and Legacy Carrier bearing. Years ago, the bearing in my 2005 Legacy GT wagon had lots of play. I went to NAPA and ordered the shaft for my car...telling them I've heard there is a difference between the Legacy and Outback. I was not very confident the item would fit.

When I installed it, I found I was right, the carrier bearing was to tall and hit the exhaust. I took it back, he made a note in there book the that part was for a Outback only.

So I'm assuming you need the Outback 4eat shaft because you have an Outback.

Go to the https://legacygt.com/forums/forumdisplay.php/fourth-generation-legacy-2005-2009-10.html that is the 4th Gen forum, it is the same chassis are you car. Ask the question there. This swap has been done there and number of times.
 
  • Like
Reactions: LBHobxt
1 - 20 of 50 Posts
Top