Boxerworks.com

Do they sell an improved version or larger spring? I read where they improved the design but I can't find anywhere if the new design was for the 1974 or where to get it

I removed the transmission from my 1974 R90S to find out that the pawl spring is broke and this is why I had to drive home in 2nd gear. Where can I purchase a new spring and do they make an upgrade to this transmission. This spring that broke is way to small for what it does. I hate to put it back t...