youztheclue Posted January 17, 2019 Share Posted January 17, 2019 (edited) The higher pitch is me blipping the throttle. When coasting it's quite and on acceleration where the engine is actually pushing i.e. going down hill faster than gravity, it has this whine. The last transmission flush had an inch of shavings on the magnetic drian plug. I have a 4 speed 260z and a unknown welded diff. Plans to swap out to spare open diff. and swap in a 5 speed 240sx transmission. Any info on that swap would be helpful to have!!! PS 75mph is actually 60mph Edited January 17, 2019 by youztheclue Quote Link to comment Share on other sites More sharing options...
HuD 91gt Posted January 17, 2019 Share Posted January 17, 2019 Is there a question with this post or your just looking for input? It seems you know the issue. Quote Link to comment Share on other sites More sharing options...
youztheclue Posted January 17, 2019 Author Share Posted January 17, 2019 (edited) I don't know if someone whos has done more than change the coolant out (me), knows the issue and can help. I am still green to owning the z and it's problems. And the noise only during acceleration is a condition I'm not 100 percent on pinpointing. Edited January 17, 2019 by youztheclue Wording Quote Link to comment Share on other sites More sharing options...
jessejames Posted January 17, 2019 Share Posted January 17, 2019 my car makes a similar noise. I believe its the diff. I've changed the fluid, it made no difference. Quote Link to comment Share on other sites More sharing options...
jhm Posted January 17, 2019 Share Posted January 17, 2019 I watched the video, and honestly couldn't hear anything untoward. However, a bunch of metal shavings in your tranny is not good. Other likely sources of whining noises in the drivetrain are the differential (welded or otherwise), and the u-joints in your driveshaft and half-shafts. If you're really worried about it, I would put it on a lift and run it....that will give you the opportunity to better track down where the noise is coming from. Quote Link to comment Share on other sites More sharing options...
NewZed Posted January 17, 2019 Share Posted January 17, 2019 Here's a good "71C" writeup from a Hybridz member. R200 swap info is all over the internet. https://www.motortopia.com/members/Nigel/mediapress/240sx-transmission-swap-14041/ Quote Link to comment Share on other sites More sharing options...
youztheclue Posted January 18, 2019 Author Share Posted January 18, 2019 Thanks guys I gonna be taking apart the car anyway so I'm gonna lift it up and see if I can get the sound on a lift. Quote Link to comment Share on other sites More sharing options...
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