so ive got an nz new 1998 wrx that ive been told has the RA gearbox but not too sure. during this week ive had the center diff out, welded, and front cv\'s removed so obviously now its rear wheel drive.
for about 2 hours it was great, drove awesome but then started developing a whurry/ whining noise from the gearbox. its not a crunching noise or anything its a smooth CONSTANT whining noise thats quickly getting worse.
it never stops and it goes with road speed, not engine speed. so in any gear it stays the same, just gets higher pitch and louder the faster i go.
could it be a bad center differential bearing from welding it? or something just coincidentally wore out? thanks for any help in advance