Harvey according to TDR the old canniter was a different design as shown in issue #64 pg. 50 compared to the revised design for the filter within a filter 10micron to 5 micron. "the difference in the shell prevents the old shell's use with the new dual-element filter. " my truck was built before (sep 07) the date stated as the change-over date 12/15/08. my truck should have had the old filter casing according to the article, so without checking what i had in the truck i ordered the new cannister and filter.
the purpose of the post was just to have folks check out what they actually have, so they don't make the same mistake that i made. When you order something you've bought it, i paid $83 for the unit and the rest in labor. the mechanic was very confused and appologetic said he would make it up to me, it wasn't his fault.
i don't know if mine was a fluke or if the C & C's had a different start date. i tend to think this might be the case, that's why i put this under the C&C's. I know that TDR researches out their tech info before they print.