I have a 97 Legacy (EJ22 engine) with a 5 speed manual transmission model number TY752VABAA . The transmission is bad. I have a replacement transmission from a 2000 Outback (EJ25 engine) with a transmission model of TY754VCACA . I found a site (http://www.gear hack.com) that lists specs for these transmissions. One spec that is different is something called F.D. My original trans has an F.D. of 3.900 and the replacement has an F.D. of 4.111.

What is F.D. and will the replacement transmission from the Outback work in the Legacy?

 

Thanks

One spec that is different is something called F.D. My original trans has an F.D. of 3.900 and the replacement has an F.D. of 4.111.

What is F.D. and will the replacement transmission from the Outback work in the Legacy?

Thanks

 

not unless you swap the rear differential as well as the trans.

 

F.D. is the final drive ratio. 3.9::1 vs 4.11:1

yeah man johnc is right the final drive ratio's are different so it's gonna cause a bind if you use that trans with your stock rear diff. if you need to get the car back on the road quickly you can swap the new trans in, and then un install the back half of the drive shaft from the carrier bearing to the rear diff and run it like that, but it will only be front drive if that's the route you take (if the 97 legacy has a two piece drive shaft this will work)

 

if it's not a two piece you could always take the rear cv axles out and leave the drive shaft alone, this however might cause wheel bearing issues, i am not sure if the cv axle holds the bearing together, i don't believe it does, but i have been wrong before.

 

your best bet for long term would be to take the trans back and get one that has the same final drive as your rear diff, or go to a junkyard and get a rear diff that has the same final drive as your new trans.

You have to swap the diff. Maybe you're thinking about a GL, but with an AWD transmission you can't just pull out the drive shaft!! You'll destroy the transmission. You can't pull axles or anything either. You have two options... Get a transmission that matches the rear diff ,or get a rear diff that matches your new tranny.

yeah man johnc is right the final drive ratio's are different so it's gonna cause a bind if you use that trans with your stock rear diff. if you need to get the car back on the road quickly you can swap the new trans in, and then un install the back half of the drive shaft from the carrier bearing to the rear diff and run it like that, but it will only be front drive if that's the route you take (if the 97 legacy has a two piece drive shaft this will work)

 

if it's not a two piece you could always take the rear cv axles out and leave the drive shaft alone, this however might cause wheel bearing issues, i am not sure if the cv axle holds the bearing together, i don't believe it does, but i have been wrong before.

 

your best bet for long term would be to take the trans back and get one that has the same final drive as your rear diff, or go to a junkyard and get a rear diff that has the same final drive as your new trans.

good call 987687. LOL i was thinking the old school 4x4 models.