8–4 Copyright © 1996 General Motors Corp.
AT 500, AT 1500 SERIES AUTOMATIC TRANSMISSIONS
Table 8–2. Spring Data
Spring Free
Color No. Wire dia OD Length Length Under Load
Foldout Ref Spring Part No. Code Coils in. (mm) in. (mm) in. (mm) in. (mm) lb (N)
7,A 27 Stator 6774966 No color code Convoluted Spring 0.64 0.30 0.15–0.33
(16.3) (7.6) (0.7–1.5)
7,B 26 Main pressure 6833294 Solid orange 14 0.125 1.06 4.19 2.01 74.16–78.76
regulator valve (3.18) (26.9) (106.4) (51.1) (329.9–350.3)
7,B 31 Lockup valve 29501072 Solid purple 14 0.125 1.06 4.27 2.01 77.2–81.8
(3.18) (26.9) (108.5) (51.1) (343–363)
29505835 No color 18.7 .098 0.648 3.11 2.51 25.83–31.57
(2.49) (16.46) (79.0) (63.8) (114.9–140.4)
8 20 Forward clutch 8624073 Solid red 10.5 0.055 0.45 1.31 0.88 8.50–12.22
piston release (1.40) (11.4) (33.3) (22.4) (37.8–54.4)
23045233 Solid red 10.5 0.056 0.45 1.28 0.88 10.00–12.00
(1.42) (11.4) (32.5) (22.4) (44.5–53.4)
29505884 Dark blue 9.5 .055 .0455 1.30 0.88 10.0–12.0
(1.40) (11.56) (33.0) (22.3) (44.5–53.4)
9,A 7 Fourth clutch piston release 8624073 Solid red 10.5 0.055 0.45 1.31 0.88 8.50–12.22
(1.40) (11.4) (33.3) (22.4) (37.8–54.4)
23045233 Solid red 10.5 0.056 0.45 1.28 0.88 10.00–12.00
(1.42) (11.4) (32.5) (22.4) (44.5–53.4)
29505884 Dark blue 9.5 .055 0.455 1.30 0.88 10.0–12.0
(1.40) (11.56) (33.0) (22.3) (44.5–53.4)
9,B 8 Third clutch piston release 6831656 Solid green 11.5 0.041 0.38 1.29 0.82 4.30–5.95
(1.04) (9.7) (32.8) (20.8) (19.1–26.5)
9,B 19 Second clutch piston release 6831656 Solid green 11.5 0.041 0.38 1.29 0.82 4.30–5.95
(1.04) (9.7) (32.8) (20.8) (19.1–26.5)
10,B 8 First clutch piston release 6831702 Solid yellow 11.5 0.044 0.45 1.53 1.01 3.59–4.81
(1.12) (11.4) (38.9) (25.7) (16.0–21.4)
6880251 Solid orange, 10 0.063 0.45 1.28 0.95 13.60–16.40
yellow stripe (1.60) (11.4) (32.5) (24.1) (60.5–73.0)
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