azpete wrote:
the bolts on the bottom retainer bracket on the jack housing may have been replaced with longer bolts. the springs sometimes hang up on the end of the bolt while extending. you can grind down the end of the bolt. sometimes that helps. other than that, its the nature of the beast.
This is what made noise on my Winnebago (new from Forest City). I was able to flip the bolts around, they were carriage bolts - the head cleared the spring where the nut didn't.
Before I flipped the bolts, I got a "bong" as each coil of the spring passed by the bolts.