ATF in gearbox

[Chris KC]

Hahaha Nick, there seems to be a fair bit of WTF in the Austin 7 world, including some threads on this forum!
Thanks for the responses so far, my reason for asking is that I have been doing some work on a Chummy which has been running with ATF in the 3 speed gearbox, I have no idea how many miles it has covered like this but all I can say is that there are no obvious ill effects. I am aware that a number of manual gearboxes do use automatic fluid but I had not heard of anyone using it in a seven until now and wondered if I am missing something.

A testament to the robustness of A7 gearboxes I feel...