No special tool was needed. Just common tools and lots of common sense like don't tighten bolt/nut at once when there are more than one for one component. Just like torquing the head bolts, apply about 50% on all first and do a second pass to finish up. Service manual is HIGHLY recommended for lube points and torque values.
__________________ Most quad problems are caused by the loose NUT connecting the handle bar and the seat.
Frame swap.
