Chevrolet 1980 Light Duty Truck Repair Manual page 211

1 M a n u a l V al v e
2. Re ta in i n g Pin
3. I n t e r m e d i a t e B oost Spring
4. I n te r m e d i a te B oos t Val ve
5. 2 3 S h i ft Valve
6. 2 3 T h r o t t l e V al v e
7. 2 -3 T h r o t t l e V al v e S pring
8. 2 -3 T h r o t t l e V a lv e Bushing
9 R e ta in in g Pin
10. R e ta i n in g Pin
11 L o w Ove rr un C l ut c h S pring
12 . L o w Ove rr un C l utch V al ve
S H IFT
T V PLUG
Figure 7A 1 -166 Removing Shift T.V. Plug
coiled pin. Then, using plastic hammer, install new shift
T.V. plug flush with rough casting surface.
8. In next bore up, install reverse boost valve, stem end
out, reverse boost spring. Install bore plug, hole side out and
coiled pin.
9. In next bore up, install 1-2 shift valve, longer stem
end out, making sure valve is seated at the bottom o f the
bore. Install 1-2 throttle valve spring into the 1-2 throttle
valve bushing and 1-2 throttle valve, stem end first, into the
bushing. Install these 3 parts, valve end first, into the bore,
aligning bushing so the pin can be installed in the pin slot.
43 44 4 5 46
1 3 . 1 - 2 S h i f t V a l v e
1 4 . 1 2 T h r o t t l e Va lve
1 5 . 1 2 T h r o t t l e Val v e S pr ing
1 6 . 1 2 T h r o t t l e V al v e Bushing
1 7 . R e t a in in g Pin
1 8 . R e t a in in g Pin
1 9 . D i re c t C l ut c h E xh a u s t S pr in g
2 0 . D i r e c t C lu t c h E xh a u s t V a l ve
2 1 . R e ve rse B oo s t V al ve
2 2 . Re ve rse B oo s t S pr in g
2 3 . R e verse B oo s t Bor e Plug
2 4 . R e t a i n i n g Pin
Figure 7 A 1 -165 Control Valve Assembly - Exploded View
S H IFT TV
V A L V E
607C152
AUTOMATIC TRANSMISSION (200) 7A1-43
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N O T E : 1980 M O D E L S C X O N L Y USE A D E T E N T PIN
(IT E M ^ 3 5 ). O T H E R M O D E L S D O N O T USE A D E T E N T P IN .
25 . Re t a i n i n g Pin
26 . 1 2 A c c u m u l a t o r Bor e Plug
27 . 1 2 A c c u m u l a t o r V a l v e
28 . 1 - 2 A c c u m u l a t o r V al v e Sp r i ng
29 . S h if t T V . Va lv e
30. S h i f t T V . Va l v e S p r i n g
3 1 . Re t a i n in g Pin
3 2 . S h i f t T V . Bo re Plug
3 3. T h r o t t l e Va lv e
34. Re t a i n in g Pin
3 5. D e t e n t Pin
3 6 . T h r o t t l e V al v e S p r in g
SHIFT TV
PLUG
Figure 7A 1-167 Removing Shift T.V. Plug
(See Figure 7A 1-169 for pin slot and identification o f 1-2
throttle valve bushing).
10. In next bore up, install 2-3 shift valve, longer stem
end out, m aking sure valve is seated at the bottom o f the
bore. Install 2-3 throttle valve spring into the 2-3 throttle
valve bushing and 2-3 throttle valve, stem end first, into the
bushing. Install these 3 parts, valve end first, into the bore,
aligning bushing so pin can be installed in the pin slot.
(Figure 7A 1-170).
11. Install m anual valve with the inside detent lever pin
groove to the right.
15
17
31
€ 32
30
36 37
38
3 9
3 7 . T h r o t t l e V a l v e Pl u n g er
3 8 . T h r o t t l e V al v e P l un g e r Bus hing
3 9 . Re t a in i n g Pm
4 0 . 1 2 A c c u m u l a t o r Sp r i n g
4 1 . 1 2 A c c u m u l a t o r Pi st o n Seal
4 2 . 1 2 A c c u m u l a t o r Pis t on
4 3 . Ch e ck Bal l 4
4 4 Ch eck Bal l 3
4 5 . Ch ec k Bal l 2
4 6 . Ch ec k Ball 1
( M O T E : 5 t h C h e ck Ball I n Cas.'l
6.3 MM (1/4") DIA. ROD
9.5 MM (3/8") LONG
607C153