Hi fellows e21ers,
Here in Indonesia, all E21 320 M10 were equipped with 4 speed manual transmission Getrag 242.
In order to convert to 5 speed manual transmission, the only possible option is using Getrag 240 5 speed from E30 318i M10 which used digital speedometer instead of cable driven speedo.
I found on ETK BMW (or www.realoem.com or www.bmwfans.info), there was E21 315 M10 using Getrag 240 5 speed manual transmission as well as E28 518i M10 with taxi package option.
On its rear transmission cover (BMW p/n 23111224208 or latest p/n 2311224419), which has ended unfortunately, it had provision for speedometer drive gear.
Is it possible to drill a hole on this transmission cover for the speedometer drive gear? What is the proper hole diameter for the speedometer drive gear?
Thanks in advance
Kusumo Bintoro
BMW Car Club Indonesia - Classic Register