don't know if kits are available. When I rebuilt my 5-speed at the end of last year, I just pulled all the bearings out and took them to a bearing shop and got matching ones. The only one I couldn't get was the needle bearing in the bellhousing. The syncro rings I ordered through Nissan but had to be shipped over, and so were quite expensive. Not sure if sunny 4-speed syncro's fit? Quote: