987687 Posted October 27, 2011 Share Posted October 27, 2011 1998 legacy GT, 2.2 swap, automatic. 242k miles. When I'm slowing from about 20mph to just under 10 it makes a noise like a turbo spooling down, it sounds like it's coming from the front of the car, but with that kind of noise sometimes it's hard to tell. It will do it in N-1-2-3-4, and even with the engine shut off. It also makes the sound going in reverse and slowing down from about 20 (that was fun to test..) Stuff I've done. Drain/fill of the transmission a few times - 3k miles ago. About 2k miles ago the front diff started complaining so I drained about a pint of really nasty liquid out. Filled it up with fresh gear oil, and it's been quiet. Hasn't discoloured (so no ATF mix), just dropped a little since the axle seals leak kinda bad. No big deal, I just top it up every few gas stops. But that's about it for maintenance, it runs and shifts really nice, just this weird noise started up. I know it's not the engine because it happens if I shut the engine down, it's gotta be drivetrain something.... just dunno what. Just make me nervous since I'm moving 1200 miles south on Monday.... I know I've seen a thread similar to this in the past, but no luck finding it. Link to comment Share on other sites More sharing options...
Turbone Posted October 27, 2011 Share Posted October 27, 2011 Check the wheel bearings. Link to comment Share on other sites More sharing options...
987687 Posted October 27, 2011 Author Share Posted October 27, 2011 Check the wheel bearings. Grumble. But good thought, I'll definitely check that! Link to comment Share on other sites More sharing options...
nipper Posted October 27, 2011 Share Posted October 27, 2011 Noises are a pitch over the net. Does the noise sound independent of vehical speed or synched with road speed. Link to comment Share on other sites More sharing options...
987687 Posted October 27, 2011 Author Share Posted October 27, 2011 Noises are a pitch over the net. Does the noise sound independent of vehical speed or synched with road speed. It ONLY does it decelerating from 20mph down to just under 10mph. In forward or reverse, although SLIGHTLY different in reverse. So I'd say, yes, linked to vehicle speed. But not linked to any gear or engine rpm. Link to comment Share on other sites More sharing options...
987687 Posted October 28, 2011 Author Share Posted October 28, 2011 so all the wheel bearings are tight and don't present any grittyness when turning the wheels. Unless this is a very very early wheel bearing failure sign, they're fine. And if it's a very early sign... they have probably 10,000 miles left... Also, it's not linked at all to the brakes. I let the car come to a stop while going up hill, and it still makes the noise. Link to comment Share on other sites More sharing options...
nipper Posted October 28, 2011 Share Posted October 28, 2011 Ok i'm stumped from the description. Link to comment Share on other sites More sharing options...
Fairtax4me Posted October 29, 2011 Share Posted October 29, 2011 Could be the carrier bearing. Take the driveshaft off and spin the bearing around, see if it's dry/rumbly. I would say drive the car in FWD, but you would have to put a plug in the tail housing to keep it from puking all the ATF out. Link to comment Share on other sites More sharing options...
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