'07 Tranny Swap Into An '05

upncummr · 03-01-2007, 07:59 AM

I have a friend that asked me whether the '07 transmission with its longer 2nd, 3rd and 4th gears could be swapped into an '05 STi. I didn't have an answer for him, but I thought maybe this group might?

Is this a direct plug and play swap?

Thanks!

Gary

crand002 · 03-01-2007, 09:11 AM

07 STi Tranny Ratios Vs 04-06

upncummr · 03-01-2007, 09:24 AM

I had researched that previous thread this morning. It is in fact one to which I had contributed.

But nowhere in that thread did I find any discussion of whether or not the actual transmissions could be swapped. There a very short discussion of swapping gear sets. But no discussion of switching the whole unit.

Gary

crand002 · 03-01-2007, 09:45 AM

I am sure the transmissions can be swapped but as far purchasing one from the factory I have heard they are anywhere from 8-11K

. The swap should be plug-in-play to answer your question.

***lackskill*** · 03-01-2007, 10:26 AM

Quote:

Originally Posted by crand002

I am sure the transmissions can be swapped but as far purchasing one from the factory I have heard they are anywhere from 8-11K

. The swap should be plug-in-play to answer your question.

IDK about that, the DCCD is different from 06 on and they also got the yaw sensor and maybe more but I cant remember for sure. Mechanically it should be a near direct swap, but electronically I bet you will also need the DCCD controller, yaw sensor and any accompanying harnesses.

EDIT: They are VERY expensive from the factory though, either buy a gearset or buy a wrecked car trans. Also, seeing as the 05 is a 35/65 center diff gearing and the 06+ is 41/59 you may need 07 gears for your rear diff as it would change your final drive ratio.

USAF_STi · 03-01-2007, 10:56 AM

Red Rocket · 03-01-2007, 11:45 AM

And since the 07 yaw sensors were brought up, would the 07 ECU need to be part of that equation for a tranny swap?

***lackskill*** · 03-01-2007, 11:48 AM

Quote:

Originally Posted by Red Rocket

And since the 07 yaw sensors were brought up, would the 07 ECU need to be part of that equation for a tranny swap?

I think thats controlled by the dccd which is a seperate computer...

***T3h_Clap*** · 03-01-2007, 11:58 AM

if you were to do it, you'd want to do the full driveline (tranny and rear diff).

unless you're willing to open up the 6 speed :eek: which requires alot of work to get back together btw.

Pitcherman · 03-01-2007, 12:06 PM

Quote:

Originally Posted by T3h_Clap

unless you're willing to open up the 6 speed :eek: which requires alot of work to get back together btw.

yeah that's an understatement

***T3h_Clap*** · 03-01-2007, 12:15 PM

Quote:

Originally Posted by Pitcherman

yeah that's an understatement

our resident (even though he just moved to mobile, AL) just went through the school on the 6-speed, and some of those bolts for reassembly require a 3 foot steel pole to get the right torque spec

i don't plan on tearing apart a 6-speed any time soon

o2sys · 03-04-2007, 10:51 AM

plus you would require a new rear diff with 3.54 ratio

Sideoiler · 03-06-2007, 10:39 AM

I'd go with the gearset(economical) or the full drivetrain(not economical).

Supraru · 03-07-2007, 04:15 PM

Id agree that the DCCD would need to be swapped as mentioned, i believe that with the yaw sensors, there is also a steering angle input as well. i could see this being a limiting factor for a daily driver.

upncummr · 03-07-2007, 04:17 PM

Thanks for the input. I'll pass this along to my buddy.

Gary

03-01-2007, 07:59 AM	#1
upncummr Spec C Club Car: '05 CGM Fav Mod: HPDEs Location: Omaha, Nebraska Posts: 1,263 IWSTI Addict since: May 2006 Trader Rating: (3)	'07 Tranny Swap Into An '05 I have a friend that asked me whether the '07 transmission with its longer 2nd, 3rd and 4th gears could be swapped into an '05 STi. I didn't have an answer for him, but I thought maybe this group might? Is this a direct plug and play swap? Thanks! Gary This ad is not endorsed by this member. Please register or login to hide this ad.

03-07-2007, 04:17 PM	#15
upncummr Spec C Club Car: '05 CGM Fav Mod: HPDEs Location: Omaha, Nebraska Posts: 1,263 IWSTI Addict since: May 2006 Trader Rating: (3)	Thanks for the input. I'll pass this along to my buddy. Gary This ad is not endorsed by this member. Please register or login to hide this ad.

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03-01-2007, 09:11 AM	#2
crand002 The Next Petter Solberg Car: 06 WRX STI Fav Mod: Front license plate delete Location: San Diego Posts: 955 IWSTI Addict since: Aug 2006 Trader Rating: (2)	07 STi Tranny Ratios Vs 04-06

03-01-2007, 09:24 AM	#3
upncummr Spec C Club Car: '05 CGM Fav Mod: HPDEs Location: Omaha, Nebraska Posts: 1,263 IWSTI Addict since: May 2006 Trader Rating: (3)	I had researched that previous thread this morning. It is in fact one to which I had contributed. But nowhere in that thread did I find any discussion of whether or not the actual transmissions could be swapped. There a very short discussion of swapping gear sets. But no discussion of switching the whole unit. Gary

03-01-2007, 09:45 AM	#4
crand002 The Next Petter Solberg Car: 06 WRX STI Fav Mod: Front license plate delete Location: San Diego Posts: 955 IWSTI Addict since: Aug 2006 Trader Rating: (2)	I am sure the transmissions can be swapped but as far purchasing one from the factory I have heard they are anywhere from 8-11K . The swap should be plug-in-play to answer your question.

03-01-2007, 10:56 AM	#6
USAF_STi Spec C Club Car: 05' CGM on silver Fav Mod: Ed's tune! Location: Bay Area NorCal Posts: 1,926 IWSTI Addict since: Sep 2004 Trader Rating: (2)

03-01-2007, 11:45 AM	#7
Red Rocket STI Driver Car: 07 UGM STI 121 Fav Mod: Trooper convention, somewhere else Location: North Coast Posts: 215 IWSTI Addict since: Sep 2006 Trader Rating: (0)	And since the 07 yaw sensors were brought up, would the 07 ECU need to be part of that equation for a tranny swap?

03-01-2007, 11:58 AM	#9
*T3h_Clap* Wheel33tist Whore Car: Aspen White GDF-D Fav Mod: Pastelito Racing / SFSOC Location: 0R!4ND0 Posts: 21,781 IWSTI Addict since: Dec 2004 Trader Rating: (7)	if you were to do it, you'd want to do the full driveline (tranny and rear diff). unless you're willing to open up the 6 speed :eek: which requires alot of work to get back together btw.

03-04-2007, 10:51 AM	#12
o2sys The Next Petter Solberg Car: 200? WRX STI Fav Mod: Super EX/RM-01A Location: NYC Posts: 939 IWSTI Addict since: Nov 2005 Trader Rating: (2)	plus you would require a new rear diff with 3.54 ratio

03-06-2007, 10:39 AM	#13
Sideoiler Spec C Club Location: Edmonton, Alberta Posts: 1,488 IWSTI Addict since: Jan 2004 Trader Rating: (0)	I'd go with the gearset(economical) or the full drivetrain(not economical).

03-07-2007, 04:15 PM	#14
Supraru Junior STI Driver Car: 00 RSTI Fav Mod: STI swap Location: Michigan Posts: 125 IWSTI Addict since: Jun 2006 Trader Rating: (0)	Id agree that the DCCD would need to be swapped as mentioned, i believe that with the yaw sensors, there is also a steering angle input as well. i could see this being a limiting factor for a daily driver.