99 f-350 4by4, finally got around to replacing my gem module (used on eBay). My 4 wheel drive works now but only in 4 wheel high. I need the lower range for pasture work. The top connector on the transfer case needs some silicone or something to hold it into place better.... But when I move it it definitely switches and puts the transfer case in gear. Any ideas on what I Need to check on to get 4 wheel low range?