AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
Figure 197 illustrates the internal components of the forward clutch housing for the 5R55N. Figure 198
illustrates the internal components of the forward clutch housing for the 5R55W/S. The only difference in
the empty forward clutch housings is the champfer in the 5R55W/S is wider.
Figure 199 is illustrations of the two different, completed forward clutch housing assemblies. Notice that the
only visible difference is the piston and the return spring retainer.
Figure 200 and 201 are illustrations of the two different forward planetary carriers and the two different
forward planetary internal ring gears. Notice the different tooth count on the planetary carrier pinions and
the different tooth counts on the forward internal ring gear.
Figure 202 and 203 are illustrations of the two different sun gear and shell assemblies. Notice that the
5R55N uses an intermediate sprag and the 5R55W/S does not. This required a taller spacer as shown in
Figure 203. Notice also the difference in tooth count of the forward sun gear, but the rear sun gear remains
Figure 204 shows 3 dimensional illustrations of the two different valve body assemblies. The most
noticeable difference is the 5R55W/S does not use a cover plate. The bolt pattern however, is exactly the same
as the 5R55N transmission.
Figure 205 shows illustrations of the two different valve body assemblies in the worm track area, different
amount of checkballs and the locations, and the retainer locations for both valve bodies.
Figure 206 is illustrations of the two different valve body spacer plates. One hole location for the spacer
plate retaining bolts has changed to help prevent you from a mis-match.
Figure 209 is illustrations of the two different reverse servo return springs. Notice the difference in the
Figure 210 is illustrations of the two different of the two different reverse servo pistons. Notice the
difference in the outside diameter of the body, to accommodate the larger diameter in the housing.
Figure 207 and 208 are illustrations of the two different reverse servo housings. Notice that the 5R55W/S
transmission has two feed holes in the housing, has a larger diameter for the inner piston seal, and has a
different reverse servo check valve.
Figures 211 and 212 are illustrations of the two different intermediate servo covers and the intermediate
NONE OF THE COMPONENTS LISTED ABOVE WILL
INTERCHANGE BETWEEN THESE TWO SIMILAR TRANSMISSIONS