Supermissle Weld rod does not go by a number like normal rods- and is byno means a "normal" rod. Check out Super Missle and Ultra Super Missle Weld at
www.jwharris.com/welref/techguide/steel_cover/#1
Also available as wire- see
www.jwharris.com/images/pdf/3-smw.pdf
Properly done, the welds with SMW or 7018 will self de-slag, requiring minimal cleaning by bead blast or ultrasonic if the carrier is removed and stripped. I do not weld gears in the housing except in the field for emergency use, although I have wilded more than I care to remember laying on a sheet of plastic in the mud beside a pond. Under these conditions, cleanliness is not usually the customers priority, it is getting back into the frey after breaking the spyder gears, if the axle gears are intact. Choices of rod are usually slim to none, sometimes bare wire. Yee-haa.
"Take It Out And Stick It" :twisted: