The mechanism runs smoothly....BUT the gearbox is VERY noisy!!
There is too much slop (shouldn't be any) in both the worm shaft bearing-to-gearcase-casting, as well as the gearcase-casting-to-drive-axle. The result is that the gearbox can flex/rock from side to side on the axle and the worm shaft (and bronze bearings) can dance around in the gearcase!!
I'd like to be able to just drop a "good" gearbox over the existing axle cog, but I realise that that simply isn't going to happen. So, I'm going to have to dismantle the main (3rd) axle assembly, press-off the gear and then re-mount a new gear and assemble a new gearbox.
I think a ball-bearing NWSL gearbox (part number 1150-6) is going to be the best option; but I will have to just measure some key dimensions first of all.
My usual "supplier" (ie: ebay), doesn't have this particular gearbox listed (not even on the US ebay site).
Does anybody know of an Australian hobby shop that would be able to supply this gearbox for me?
Any help will be appreciated.