I had the same problem with my 02 Outback MT only the shudder was not limited to turns but it only happens for the first few miles each morning. The problem was the clutch, there is a TSB on this. Since I have 40k miles my local Subaru dealership fixed the problem under the engine/drivetrain warrantee.
2002 Outback-Shuddering in Slow tight turns
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX
Posted
I had the same problem with my 02 Outback MT only the shudder was not limited to turns but it only happens for the first few miles each morning. The problem was the clutch, there is a TSB on this. Since I have 40k miles my local Subaru dealership fixed the problem under the engine/drivetrain warrantee.