lost

Does anyone have an aftermarket diff, front or rear that makes noise or is difficult to turn at slow speeds? My diff seems to make noise when turning into parking spaces or other sharp low spped turns. Subaru is telling me it is the wrong diff and wants to charge me a ton of money to swap it out. They say the front and rear are not correct. I think they are aftermarket but I only recently got the car and have no way of contacting the past owner. Car shifts and drives flawlessly otherwise and is FAST. Trany whines a bit but it is a '95 so I expect some of that. The clutch grabs hard and the car has incredible acceleration. There are Cusco stickers on the back and it came with a Cusco front diff in a box. SUbaru has had it for almost three weeks checking it. If it is just that it is aftermarket and that is normal then I don't care. If my wheels are going to fly off as I drive down the road then that could become a problem. The car is JDM '95 WRX RA STi. Thanks.

lost

Thanks for the info. You guys saved me some cash. I took the car back from the Subaru place and told them I didn't want to change it out. They say the transmission is not a subaru part and should be changed back to factory parts also. How common are aftermarket transmissions? I think this car was used for rally before I got it. Several body parts are fiberglass and it only goes about 120 km at 3500-4000 rpm in 5th gear but will get there really fast. Has Prova parts and grafics all over the car. Front spoiler, side skirts, wing, hood, grill, wheels and the entire exhaust are Prova. The intercooler is huge, suspension is not factory and has a carbon fiber shock tower bar and boost meter. Everytime I get under the hood I am finding new stuff. Someone put a ton of money into it and I wish I knew what all has been done. I am going to try to find some people around here that know more about the STi and can help me uncover all that has been done to this car. When I find out I will post it. Also I am looking for a dyno here on Okinawa just for curiosity sake. Anyone know about what a stock '95 STi RA should be putting out? I am guessing between 270-280? If I get a dyno test it may tell me more about real mods besides the cosmetic stuff.