QUOTE(echocanyons @ Oct 14 2010, 12:05 AM)
you just have to read
this page it is very comprehensive.
That page is a great resource. BUT... If you are having a hard time understanding the spreadsheet you might want to look at this as it might be a little more simpler and easier to understand as it doesn't try to cover as much material...
http://www.roadglue.com/wiki/index.php?tit...14_transmissionQUOTE(vintage914racer @ Oct 14 2010, 12:16 AM)
Which number corresponds to the teeth on gear among the pair of numbers separated by the colon (29:22 for example)?
As mentioned above, each gear, is a set. One is on the input shaft and one on the output (pinion) shaft. So for example a stock first gear on a 914 uses an "A" gear set which as a ratio of 11:34 (3.091). If you looked at the input shaft, you would see a small diameter gear with 11 teeth, while on the output shaft, you would see a large diameter gear with 34 teeth.
So if you look at the chart on the 914 Wiki, the number on the left of the colon would be the teeth count for the gear on the input shaft and the number on the right is the teeth count for the gear on the output shaft.
Assuming you kept everything organized and know what gears are which, you should be able to count the teeth and match them to the chart. When I rebuild a transmission, I document the what gear sets are used and in what locations they are installed in prior to pulling them off the shafts.