GMC 1990 Light Truck Repair Manual page 12

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OA-6 GENERAL INFORMATION
1. Transmission I.D. Location
1 HM-1 t7 |
2. Transmission Identification Tag
OXXY
Figure 12— Hydra-matic HM-117 Transmission I.D.
threads of a tapped hole. This is accomplished by dis­
torting some of the threads or by using a nylon patch
or adhesive (figure 23).
RECOMMENDATIONS FOR REUSE:
1. Clean, unrusted prevailing torque nuts and bolts
may be reused as follows:
a. Clean dirt and other foreign material off the nut
or bolt.
b. Inspect the nut or bolt to insure there are no
cracks, elongation, or other signs of abuse of
overtightening. (If there is any doubt, replace
with a new prevailing torque fastener or equal
or greater strength.)
c. Assemble the parts and hand start the nut or
bolt.
d. Observe that, before fastener seats, it devel­
ops toque per the chart in figure 23 (if there is
any doubt, replace with a new prevailing
torque fastener of equal or greater strength).
e. Tighten the fastener to the torque specified in
the appropriate section of this manual.
BUILD DAY OF M O N TH
MODEL YEAR
01 - 1ST DAY
(0 - 19901
15 - 15TM DAY
J j / o '
BUILD MONTH
A * JANUARY
B • FEBRUARY
C - MARCH
D - APRIL
E ■ MAY
H - JUNE
K - JULY
M . AUGUST
P - SEPTEMBER
R » OCTOBER
S ■ NOVEMBER
T . DECEMBER
—j SERIAL NUMBER |
)
p l a n t
^MUNCIE
61OXXYMXXXXXX
Location
F7574
Figure 13— Hydra-matic HM-290 (5LM60)
2. Bolts and nuts which are rusty or damaged should
be replaced with new parts of equal or greater
strength.
Transmission I.D. Location