gvowzcar Posted October 21, 2023 Share Posted October 21, 2023 Hi all, new to this site, I am after a set of synchro rings for from research I think is a FS5W71B gearbox (maybe FS5C71B) (1973 240z) Happy with Bronze rings. ?? are they available in Aus and if yes where. Found a US site but unsure if they would be suitable for AUS box or are they all the same. Really only need to fix the standard 2nd gear issue but figure might as well replace the all while I am there. Thanks Graham Quote Link to comment Share on other sites More sharing options...
C.A.R. Posted October 22, 2023 Share Posted October 22, 2023 (edited) Welcome Graham. Firstly you actually need to determine what gearbox it actually is. Unless you know the full history of the Z, it could have any Datsun 5 speed fitted as they are now over 50 years old. Both brass synchro rings (about $100ea) and steel bulk rings (well over $200ea!) and are still available new from Nissan. If you are not inclined to do the rebuild yourself, I'd send the gearbox to either: Les Collins Racing in Vic: https://lescollinsracing.com/contact Or Stewart Wilkins Motorsport in NSW: https://www.swmotorsport.com.au/ HTH Edited October 22, 2023 by C.A.R. gav240z 1 Quote Link to comment Share on other sites More sharing options...
gvowzcar Posted October 24, 2023 Author Share Posted October 24, 2023 Thanks for response, will try nissan for synchros, I assume that they will fit regardless of which box I have (think its original although probably rebuilt at some stage), Have not tried to get any z parts from nissan, I thought they would laugh at me if I tried to order zparts from them. Will rebuild the box myself, Did my apprenticeship with a datsun dealer starting in 1973, was always surprised back then that most of the 260z coming into australia then were 2+2s. Quote Link to comment Share on other sites More sharing options...
C.A.R. Posted October 24, 2023 Share Posted October 24, 2023 (edited) 5 hours ago, gvowzcar said: I assume that they will fit regardless of which box I have No they will not. Either type of synchro has their own hub assembly, so they can't be interchanged. You need to remove the cases to determine what synchro / bulk ring box you have and order accordingly. Furthermore, if 2nd gear ring is 'crunching' the others won't be far behind it... Edited October 24, 2023 by C.A.R. Quote Link to comment Share on other sites More sharing options...
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