Just wanted some advice/help with all this stuff, plan to do the wires/plugs before 40,000 miles but not right now...I DO plan to do the differential again and the trans. fluid and filters for the first time. How hard is it to change the trans. filters and drain and add new fluid? Also, is it OK for me to buy a pump for the differential and pump and refill, or is it absolutely necessary to redo the seal I made last time @ 15,000 miles between the diff. and the cover? Any tips on any of this stuff? Also, when doing the plug/wire change, from what I understand all I need to do a tune-up is the plugs, wires and pcv valve right? am i missing anything? thanks for any help guys!