Alternate Subaru engines and transmissions?

[nikbrewer]

I know alot of parts are interchangable between alot of subarus over the years.

Has anyone looked into the newer 6 sp out of an outback or legacy? the final drive may be too low,. but thought this might be a viable alternative to a sti transmission, since it has a normal center diff.

also, could later engines be used if using a stand alon engine management system? I know alot of later cars have canbus, and immobilizers, and other items that may make it difficult to install due to all the wiring, ect.

[Mechie3]

The Legacy 6spds on the newer cars is a 6speed crammed into the existing 5 spd housing. There won't be much benefit if any.

[nikbrewer]

no benifit as far as what? I was thinking for just having mre gears, not strength. I may do a NA build, so i thought more gears would be help.

Are people wanting the STI trans for strength or for 6 gears?

[Mechie3]

Strength. 5 Spds tend to break with higher power. 6 speeds are good up to 600whp+.

[Ironhydroxide]

not all 6 spds are up to 600 hp.


the 10+ legacy chassis and now 2014 forester has a 6spd in the 5spd case.


i believe these are CLOSE to the same design, but i doubt someone has made a 2wd coupler for them.

also, the transfer case housing is slightly different due to the change in shift linkage to cable.

[Mechie3]

not all 6 spds are up to 600 hp.


the 10+ legacy chassis and now 2014 forester has a 6spd in the 5spd case.

.

Correct. I mentioned that previously but was clarifying why people like the STI 6 speed asked in post 3.

[nikbrewer]

OK, I was just wondering just in case I came across one at a good price

[Mechie3]

Some transmissions don't have the speedo gear and use the hub sensor for speed.

[nikbrewer]

I figured if the speedo ever became an issue, I would just use one of the GPS based speedo's from speed hut or something

[Ironhydroxide]

Some transmissions don't have the speedo gear and use the hub sensor for speed.

Speedo gear can be added fairly simply though