All I have installed a power steering conversion kit on my 1953 GMC 1/2 ton pick up and after getting it all installed and plumbed and filled I started the truck and let it bleed the air out then topped it off. I started the truck back up and tried to turn the wheel I had some resistance at first then it let go and all seemed to work well, Then I looked under the truck and saw a puddle the steering box is leaking at the input shaft. I removed the jam nut and the nut to repair the seal put it back together but it still leaks.

Any suggestions? CPP told me they would sell me a new steering box, but I don't want to yet.

Evan