Can't shift into gear while engine running
I just replaced the blown slave cylinder, bled the system, and now I can shift thru the gears while the motor is off, but not while on. When attempting 1st, the car will move forward just a tiny bit, and does the same backwards when trying to get it into reverse, but no grinding noises.
Did I most likely not bleed the system correctly, or has something else in the system failed? I used a vacuum bleeding kit on the slave cylinder bleed valve, and topped off the brake reservoir as needed, but the shop manual says they use an Audi tool that also applies pressure to the fluid at the top of the system in the reservoir.
I've checked both ends of the master cylinder and there's no signs of fluid leaking from it, but I'm not sure how they tend to mechanically fail.
'99.5 A4 1.8t QM