I ordered fan clutch, fan, and water pump as a unit from rockauto, since im there and I read the very good write up for changing t-stat and t-stat housing on this forum. Unrelated to all this, but its all related right. Ive been trying to get the right speed sensor for my speedo, since 2 of the local auto shops, and thats all we have here get me the wrong part. I was wondering if anybody knew of a supplier/ part number for that sensor. I think its the one on the drivers side, on the side of the transmission, right behind thing auto shift linkage. Just maybe with the fan replacement and this sensor replaced the little truck wont sound like it taching out. and really long upshifting. I go up the slightest grade in the road and it downshifts quickly and slows way down. I've done a transmission oil and filter change. the level is good, water is good. Could this all be related to a fan clutch.