Transmission Maintenance Instructions (Cont)
There are two kinds of fourth clutch piston/fourth clutch housing assemblies.
Model A has a large seal ring on the piston and a medium seal ring in the
housing. Model B has a large seal ring and a small seal ring, both rings located on
the piston. The Model B housing does not have a seal ring. If a Model A housing
must be replaced by a Model B housing, both the piston and seal rings must be
Check bottom of fourth clutch piston (1)
and note whether labeled T, S, or M.
Stack 10 clutch plates (2 and 3) on flat
surface of press starting with steel
plate (2) and alternating with friction
Place backplate (4) on clutch plates (2
Press evenly on backplate (4) with 980
to 1020 lb load (4359 to 4536.9 N).
Measure distance from base of clutch
pack (5) to machined surface (6) of
backplate (4). This is clutch pack
If fourth clutch piston (1) is a T-piston,
clutch pack thickness must be 1.361 to
1.387 in. (34.59 to 35.23 mm). If fourth
clutch piston is an S-piston, clutch pack
thickness must be 1.388 to 1.414 in.
(35.26 to 35.92 mm). If fourth clutch
piston is an M-piston, clutch pack
thickness must be 1.415 to 1.441 in.
(35.94 to 36.60 mm). If measurement of
clutch pack thickness is other than
stated above, replace clutch plates (2
and 3) as needed.
Remove clutch pack (5) and
backplate (4) from press.