I hope you did not grease/oil the shaft prior to installation.
Take the wieght off the LCA and with a dead blow seat the shaft in to the K member hard. Put the weight of the car on the LCA.
NO lock washer or lock nut tighten it with an impact, bounce the front of the car several times.
Remove the nut install your lock washer and torque
Hope that works for ya, that's how I did mine.
