Small block gearbox ratios

[milwain]

Iv got a small block gearbox but need to no if its CR or WR i no its from a 1.0 12v but i carnt make out what it says on the end casing its worn away is there any other way of telling on the box thanks

[Stuart]

http://slindborg.hostei.com/gears/index.php

like
y to be an f13 cr with a 3.94 fd (you can either count the teeth on the fd or look at the marks on the teeth tops as they mean something too

[milwain]

Thanks mate i think im just going to put it in and see what its like

[pottersrebel]

count the second gear teeth on the big cog and the cog that meshes with it on the gear cluster divide the bigger number by the smaller number and u have ur ratio 2.14/2.13 is a cr and 1.96 is a wr the markings on the diff also tell u what diff you have, no notch is a 4.1 I think 2 notchs is a 4.3, 3 notchs is a 4.5, 4 notchs is a 3.7 and 4 notchs is a 3.9 altho I'm not 100% on that been a while since ive looked at anything other than a 4.1