logic23 Posted October 5, 2009 Share Posted October 5, 2009 Hey guys I have a 99 Legacy GT with a blown rear diff. in the shop. Any ideas what other diffs will work? Does the GT have the same transmission as a regular Legacy? Thanks. Link to comment Share on other sites More sharing options...
edrach Posted October 5, 2009 Share Posted October 5, 2009 If you have a manual transmission almost any R160 diff will work for you; check the transmission chart in the USRM to see whether you have a 4.111 or 3.900 version and what models/years have the same as you need. I can't help you for the automatic transmissions. Transmission type can be found on the VIN plate in the engine compartment or the label on the transmission located on the bell housing near the starter motor. Link to comment Share on other sites More sharing options...
johnceggleston Posted October 5, 2009 Share Posted October 5, 2009 Hey guys I have a 99 Legacy GT with a blown rear diff. in the shop. Any ideas what other diffs will work? Does the GT have the same transmission as a regular Legacy? Thanks. 99 GT auto trans has a 4.44 rear diff final drive ratio, any outback auto trans 96 - 04 will work. 99 GT manual trans has a 4.11 final drive, any manual outback 96 - 04, or auto 2.2 legacy from 95 on will work. (4.11s were also used before 95 but the make and model was less consistent.) if you search for one '01 and later you can pay a little more and get one that is a limited slip differential. Link to comment Share on other sites More sharing options...
logic23 Posted October 7, 2009 Author Share Posted October 7, 2009 Hey thanks for the info. So two more questions: 1. so even though the transmissions changed (4 to 9 bolts etc.) the rear differentials are the same? 2. O.K. Forgive my naivety: how does the limited slip rear dif work and what are the advantages and does the 01 legacy manual transmission have the limited slip too? Link to comment Share on other sites More sharing options...
johnceggleston Posted October 7, 2009 Share Posted October 7, 2009 (edited) Hey thanks for the info. So two more questions: 1. so even though the transmissions changed (4 to 9 bolts etc.) the rear differentials are the same? yes they are the same, no changes. 2. O.K. Forgive my naivety: how does the limited slip rear dif work and what are the advantages and does the 01 legacy manual transmission have the limited slip too? in a nut shell, when one rear wheel is spinning, it sends power to the other wheel. in an open differential, when one wheel spins, the other just sits there. the viscous LSD was offered in outbacks starting in 01(i think) and standard in outback and GTs in 03 (i'm sure). for regullar hiway and city driving you don't gain a lot. snow and ice it will come in handy, off road it's a "must"?. but the viscous type is less desirable than the mechanical type. although a subaru is AWD there are times it can be only 2 wheel drive. if you have open differentials front and rear, and both right side wheels are on ice you can get stuck. the right side wheels both can spin and both left side will do nothing and you are stuck. (appling a little bit of brake while giving it gas will stop the spin may cause the other wheel to grab.) most cars on the road to day are 2 wheel drive and if one gets on ice, it's zero wheel drive. if you add an LSD it is always a 2 wheel drive. Edited October 7, 2009 by johnceggleston Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now