The 85-91 transmission family could be called the first design and was built very straight forward.
Begining in '92, Aisin Seiko, [the manufacture], released a new, streamlined, second design.
Shift shaft bushings, Reverse syncrow brake, Oil baffle, Internal magnets, Bearing and Syncrow improvements, ect.
Do the R series have these upgrades, or did they get them at some point too? -- Matt
