I'm working on installing a steering rack (91 240 sedan), with lower coupler and steering shaft attached. How do I get the steering shaft into the upper coupler, as it has only gone in a few millimeters? I've tried wiggling it, but that doesn't seem to do much, and I've tried to remove the lower coupler/u joint, I'm not sure how to do that either. Please help and thank you.

 

scroll down a couple pictures on the left:
oilpan

 

Make sure the pinch bolt is completely removed from the coupler. It prevents the shaft from sliding in and out of the coupler.