3niftyz Posted May 29, 2021 Share Posted May 29, 2021 Sorry of this isn't in the correct place (couldn't see a transmission/gearbox/drive line section) All of a sudden my 07 HR gearbox has started grinding in 6th gear. I've done allot of searching and can only find people with 5th and 6th grind not just 6th. My old DE did it but that was high mileage compared to my HR with 50k miles. The de actually eventually stoped grinding I think. But this is so strange. I flushed it and refilled it still still the same. Could anyone help. I believe it to be the synchro but shouldn't I also grind in 5th? Don't wanna have to get a new box 😅 Any help would be very grateful. Quote Link to comment Share on other sites More sharing options...
Andy_Muxlow Posted May 29, 2021 Share Posted May 29, 2021 It sounds like the synchros have gone. It might need to be rebuilt. Quote Link to comment Share on other sites More sharing options...
3niftyz Posted May 29, 2021 Author Share Posted May 29, 2021 1 minute ago, Andy_Muxlow said: It sounds like the synchros have gone. It might need to be rebuilt. Yeah what I though but wanted to be sure. Every other gear is perfect and never thrashed into 6th ever. Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted May 29, 2021 Share Posted May 29, 2021 As what Andy has said ^^^ However low mileage preowned guaranteed fully working 350Z HR gearboxes are in stock and good to go same/next day. Just drop me a PM if I can help you further. Quote Link to comment Share on other sites More sharing options...
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