After posting I crawled under the 49. No oil on the floor of the shop and the transmission seemed at the right level. Then I checked the differential and sure enough a few spoonful's trickled out. The truck had not been driven for about 18 hours so all oil should be level. But why did the diff overflow while the trans had an adequate level. I don't want to think the TT seal has gone again. Maybe its time to go open driveshaft. I have a centre section from a TF truck which will bolt in and a couple of TF 3 speed trans to work with.
