Mike104 Posted January 23, 2013 Share Posted January 23, 2013 OK I have a '99 OB with the 2.5L and 4EAT and have a strange noise that I thought I would ask the board members for an opinion on. Like the title says its only when I accelerate at wide throttle and only in one specific gear (I'm not sure if it's second or third?). It sounds like a bearing noise or a whistling noise. Is it likely a transmission noise or could it also be a front diff bearing? Trying to guage whether the likely fix will be a 4EAT swap? Thanks for reading. Quote Link to comment Share on other sites More sharing options...
CNY_Dave Posted January 23, 2013 Share Posted January 23, 2013 (edited) Front or rear diff would make noise in all gears. I'm an expert on front pinion noise at this point check out the pinion noise vids I have on youtube at CNY1RC. Edited January 23, 2013 by CNY_Dave Quote Link to comment Share on other sites More sharing options...
Mike104 Posted January 23, 2013 Author Share Posted January 23, 2013 Thanks Dave, I'm just kinda wondering why its only in the one gear. I can also hear it when the transmission downshifts during an acceleration too like on the freeway. Quote Link to comment Share on other sites More sharing options...
Suba9792 Posted January 23, 2013 Share Posted January 23, 2013 I would say its time for a new 4eat. The gears are probably fragged. Drain your great oil and trans fluid to see if you get a present:) Quote Link to comment Share on other sites More sharing options...
CNY_Dave Posted January 23, 2013 Share Posted January 23, 2013 It could be something silly, also. It might only move just the right way for something to make contact in 2nd, or vibrate just the right way only in 2nd. The fact it only makes noise WFO is a hopeful sign. Quote Link to comment Share on other sites More sharing options...
mattslote Posted January 24, 2013 Share Posted January 24, 2013 My 2000 Legacy does the same thing when I open her up. I asked my friend about it and he said it might have something to do with the valve timing change when accelerating quickly. His volvo did it too, and that's what caused it for him. Quote Link to comment Share on other sites More sharing options...
nipper Posted January 24, 2013 Share Posted January 24, 2013 Blu used to do this, i think maybe you may want to look someplace else. With Him the Tabs for the air box were broken. At wide open throttle this would cause an air leak, hence a whistle. So check to make sure your airbox (air filter) is seated if you have touched it lately. Quote Link to comment Share on other sites More sharing options...
Mike104 Posted January 29, 2013 Author Share Posted January 29, 2013 Nipper, Thanks for the advice, I did have it opened a while ago so I will check that first. Its also due for an ATF change as well so I'll do that too and see how it goes. I guess when it is in that gear and WOT it can make a noise and when it shifts, the RPM drops so that may be the reason it only does it at that time. Thanks for all of the help! Quote Link to comment Share on other sites More sharing options...
Mike104 Posted February 5, 2013 Author Share Posted February 5, 2013 I reseated the airbox cover and noise is much reduced. Thanks Nipper. I think I need to get a Subaru OEM filter (it is a solid metal frame) to reduce the likely hood of the floppy one moving around in the air box. It's due for replacement so I think I'll just put an OEM one in this time. Quote Link to comment Share on other sites More sharing options...
nipper Posted February 5, 2013 Share Posted February 5, 2013 Quote Link to comment Share on other sites More sharing options...
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