RE: Fault code P1757
If you do a search for "service manual" on this forum, you will be able to find a service manual that you can download. From what I see, you will have to drain the tranny fluid and drop the pan, but from there, it doesn't look too difficult at all. I have never replaced one before, but I remember seeing it when I changed my fluid and filter this past summer.
2005 4wd 1500 HEMI, 4.56's, TruTrac, Mag-HyTec, 315/70-17 Hankook ATM's, Pacer rims, CAI, SC #3865, E-fan, 180* T-stat, PaceSetter Long Tubes with MagFlo cats & Spintech muffler - single exit hidden under bumper