4–12
Copyright © 1996 General Motors Corp.
AT 500, 1500 SERIES AUTOMATIC TRANSMISSIONS
i.
Inspecting Gears
(1) Inspect gears for scuffed, nicked, burred,
or broken teeth. If the defect cannot be removed with a
soft honing stone, replace the gear.
(2) Inspect gear teeth for wear that may have
destroyed the original tooth shape. If this condition is
found, replace the gear.
(3)
Inspect the thrust face of gears for
scores, scratches, and burrs. Remove such defects with
a soft honing stone. If scratches and scores cannot be
removed with a soft stone, replace the gear.
j.
Inspecting Splined Parts. Inspect splined
parts for stripped, twisted, chipped, or burred splines.
Remove burrs with a soft stone. Replace the part if
other defects are found. Spline wear is not considered
detrimental except where it affects tightness of fit of
the splined parts.
k.
Inspecting Threaded Parts. Inspect parts for
burred or damaged threads. Remove burrs with a soft
honing stone or fine file. Clean up damage on small
threads by chasing threads with a used die. Clean up
damage on large threads with a fine file. Replace part
if damage cannot be cleaned up.
l.
Inspecting Snaprings. Inspect all snaprings
for nicks, distortion, and excessive wear. Replace the
snapring if any of these defects are found. The
snapring must snap tight in its groove for proper func-
tioning.
m. Inspecting Springs. Inspect springs for signs
of overheating, permanent set, or wear due to rubbing
adjacent parts. Replace the spring if any one of these
defects are found. Refer to the spring chart at the end
of Section 8.
n.
Inspecting Clutch Plates
(1) Inspect friction-faced steel plates (inter-
nal-splined plates) for burrs, imbedded metal particles,
severely pitted faces, excessive wear, cone, cracks, dis-
tortion, and damaged spline teeth. Remove burrs, us-
ing a soft honing stone. Replace plates which have
other defects.
(2)
Inspect steel plates (external tanged
plates) for burrs, scoring, excessive wear, cone, distor-
tion, imbedded metal, galling, cracks, breaks, and dam-
aged tangs. Remove burrs and minor surface
irregularities, using a soft honing stone. Replace plates
which have other defects.
(3) The amount of cone in clutch plates is
determined by measuring the distance between the
inside diameter of the plate and a flat surface (Figure
4–6). Discard plates having excessive cone (refer to
Wear Limits, Section 8).
o.
Inspecting Swaged, Interference-Fit Parts.
If there is evidence of looseness, replace the assembly.
p.
Inspecting Balls in Clutch Housings. Inspect
all balls in rotating clutch housings for free movement.
The minimum movement is 0.040 inch (1.02 mm). Any
restriction could prevent the ball from seating during
clutch application. Inspect staking that retains the balls.
q.
Inspecting Seal Contact Surfaces
(1) Inspect the surfaces that contact the seal-
ing area or lip of any seal. Correct any roughness,
scoring, pitting, or wear that permits transmission fluid
leakage or causes damage to the seal. Replace the af-
fected part if defects cannot be corrected.
(2) Inspect sealring groove thrust faces for
wear and surface finish condition. There must be no
step, edge lip, or rough finish on the face. The thrust
face of the sealring groove is always the face that is far-
thest from the fluid feed area between a pair of seals.
Figure 4–6. Method of Measuring Clutch Plate Cone
CAUTION:
Do not attempt to correct the governor driven
gear with the use of a soft stone. If the governor
driven gear is scuffed, nicked, burred or has bro-
ken teeth, replace the governor assembly.
Measure here for cone
CLUTCH PLATE
LEVEL SURFACE
V00778