I asked a very similar question a while back Jon!
You need the right pinion, the tooth shape is different.
(That is to say, you could only use a pinion from another 8/45 pair.
Ideally you don't mix and match parts from different pairs, but they will work - the main probable downside being noise).
You need the right pinion, the tooth shape is different.
(That is to say, you could only use a pinion from another 8/45 pair.
Ideally you don't mix and match parts from different pairs, but they will work - the main probable downside being noise).