Another question I am afraid... Looking at all the old bits and pieces I have in my garage and I have come across the 4 speed that used to be in my 56. Problem is I dont know what it is... So, could anyone help point me to a site that I can compaire the numbers against? (already tried Google and failed) Pretty sure it is a BW, possibly a Super T10, give away could be because it is cast into the casing... The numbers on the box are 13-04-097-904 on the case 12-04066.90 on the tail shaft It has what appears to be 26 splines on the input shaft and 6 grooves on the input shaft. The side plate is held on with 9 bolts and the reverse selector is on the tail shaft. So... Over to someone who knows a lot more about these things than I! Thanks in advance P.