1966 A904 loses all gears overnight
Thanks for all the advice fluid level is correct. I'm going to unplug the transmission line at the radiator and see if there is pressure or anything and go from there. I do have a extra front pump that was working but it's from a 67 a904 273 would this work with a slant six 904
The cooler line is a low-pressure lube line,only. It won't tell you much other than the line is clear. If it was plugged it wouldn't make any difference to the trans operation, only to it's life.
The pumps,I imagine, are the same, but it's not likely that your trans has a pump problem. In fact, I would say it's highly unlikely.
The most likely problem is the manual valve.and
the second most likely is the L/R band. I have seen the anchors break off and the strut falls out. And then nothing works....just like in your case.
As to the manual valve, it may just be that the roostercomb inside is not synced up with the shifter. I've been fooled by this before when the manual valve was not correctly detented and then it either dumps all pressure into the pan, or it blocks pressure to the rear clutch.In either case the result is the same, no drive in any position
Oh that brings up another point, If the manual valve is not synced up, then it is also possible that in neutral, fluid will not be directed to the TC. So, I suppose it's possible in this case, for the fluid level to be correct in the pan, but the TC could still be half empty....... and same no-drive symptom. So I think it would be prudent to start at the shifter sync