Johny wrote: Hi weber. Do you know how Ross overcame the problem of lubricating the rear oil seal (around the tail-shaft slip-yoke) without swamping the front motor bearing with oil? This is my current concern with using my tail-shaft housing. Sorry - a bit off topic here.
Not too off topic since one aim of many AC conversions is to eliminate the gearbox. But you can email me direct on d dot keenan at bigpond dot net dot au.
I have emailed him the question and will let you know. But I suspect he didn't solve it. I note, for others who may not be familiar, that the tail end of the gearbox of a front-engine rear-wheel-drive usually has a plain bearing that supports the front end of the propshaft (also called confusingly tailshaft or driveshaft in various countries) which is driven internally by a spline that allows for some misalignment. This plain bearing, and the spline, need lubrication, but you don't want your electric motor filling up with gear oil. 90 grade oil between rotor and stator could be a serious drag.
My own thoughts are to put gear oil into the tail casing, while on level ground, with the propshaft out, until oil just starts to run out the back, and rely on it moving about, as the car accelerates and goes up hills, to get it to the spline and plain bearing. And rely on the motors own oil seal to keep it out on the downhills and decelleration. Sounds a bit risky I admit.
If it did get into the motor, could it be flushed out with a solvent without disassembly?