Also, cheaper filters have smaller inlet holes that will restrict the amount of oil going into the filter, causing the oil PSI to be slightly higher. This is a common problem on Rams when sombody uses the cheap ass POS Fram filters. After they change the filter to a better one, the tick goes away.
Good filters are WIX, Purolator, K&N/Mobil 1, Napa Gold, Mopar, Toyota, and Motorcraft.
http://minimopar.knizefamily.net/oilfilters/index.html
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1999 Dodge Ram 318 4x4 K&N,Dynomax muffler,Hemi Orange Grille,Bilistein Shocks