There are 7 on each front axle. There are two on the differential and possibly one on the driveshaft.
The ones on the front are as follows: top, middle, and bottom of kingpin (wheel side of control arms). The middle does the kingpin bushings the top and bottom grease the trunnion pivots where the upper and lower control arms attach.
The upper and lower control arms then also have fiitings that grease each trunnion type pivot (at where the arms pivot on the frame).
The concept of trunnion pivots versus control arm bushings is one for you to investigate. The difference is in how movement is accomplished. Anyone care to explain a trunnion??
Bosch Master, ASE Master, L1
33 years MB technician