hi guys , it must be a 3.62:1, i have a couple of decent cases, and i have a steel plate for them also, i will enclose a pic of my pinion so that we can see what IT SHOULDNT be like

if you look at the pinion, you will see the teeth taper off towards the centre of the diff, these look to be very worn, from the diff wall, the teeth profile are approx 1-2mm thick , in the centre ( away from the wall) they are almost pointed with no 'square' profile