Speed sensors and solenoid kits are not considered as "wear items." The band and clutch friction plates could be considered "wear items," but they are not usually serviced unless a rebuild is taking place because the transmission has to be taken apart to get to them. Really, the only serviceable "wear item" is the fluid. The filter, which is actually just a screen, is not considered a "wear item," either. As I was once told at a Nissan Training Center, "If there is enough debris in the transmission fluid to clog or restrict the screen, the transmission needs an overhaul and not a service." If servicing the fluid, avoid using Dexron III/Mercon ATF; it can cause sticking to occur in the valve body. Nissan-matic Type "D" ATF, which is the same as the original Dexron formula, is a good choice, but pricey. Most synthetic transmission fluids, like Valvoline Maxlife ATF and Castrol Transmax Import Multi-vehicle ATF, are very good choices as they are recommended for Dexron/Dexron II applications.