I have a 92 Navajo and it has 140K+ and I'm running BFG 31/10.5's and the pump was very noisey, I changed it out myself for about $50. I rented a puller for $5 and the installation was very easy, (I had already removed the R12 A/C so the compressor was already gone, (which made the pump sound even worse). After changing the pump the noise went away and the loose steering was cut in half.
I did have to get a new pressure line because the nut that connects it to the pump wouldn't come loose, it did come off the gear just fine so I just replaced it, ($30).
I hope this helps!
FM
by the way hows the weather in Norfolk, I moved to CA when I got out of the Navy and I don't miss the east at ALL!!