New to the MB, looking for info on auto trans replacement for 92 SVX

Most common at this point is to put a 4.44 final drive auto trans and rear differential from a 96-98 Legacy Outback into them. Decent performance and reliability increase and a pretty straightforward install. Hardest part is swapping your rear differential carrier into the replacement diff so that you can keep the rear vLSD and match your existing axles.

 

Beyond that you can do a 5 or 6 spd manual transmission swap. That requires some mild mod work to the firewall for the replacement pedal box so you can fit a clutch pedal. The 5spd's aren't that strong, so if you plan on beating on the car, a 6 spd is better but that's $$.