nah the flywheel on the a12 has like 1.2cm difference est. in diameter....btw the a15 is out of a c20 vannette....and yes there is a difference with a lighter flywheel on an a15, accelerates alot harder . . .well its not gonig to be gonig anywhere, i blew the diff this evening, couldnt handle the power

what? is it really that much more power just a stocky A15 with CAI and full exhaust? or what exactly were u doing when it happened?

Hard launches will kill H150s before to long.
If I know you, you've been caneing the living bejesus out of this car, ever since you got it. It's only a matter of time before it went bang.
Plus, now that you have more grunt, youve got more incentive to give it death. Hence, 90% worn diff+more grunt+abuse=catching the bus.

My h145 lasted 11months of hard thrashing behind a worked a14. Only replaced it 2 days ago and it still wasn't dead just noisy a hell. When I pulled it out I found that the grub screw had broken allowing the centre pin to float a smash into gears making the horrible noise. I musn't thrash it as hard as some of you guys who seem to kill them in a matter of months, weeks or even days. Hey and im only a youngin. I thought you older blokes didn't kill cars as bad as the young blokes.

me? thrashing the datto?.....nahhh *whistles* i drive it a bit more gently now, no more burnouts or idiotic driving. diff has been replaced with a b310 wagon diff, have no idea what ratio it is so hopefully it will last longer.

My understanding is that the square headlight A15 powered wagons came with a quite rare 3.7:1 diff ratio.
Otherwise 99% chance is it will be a 3.9:1 ratio.

i wouldnt have a clue what it is nor what to look for when indentifyingh it. got it for free from m ex g/fs father so cant complain!