C 1500 1/2 Ton Pickup 2WD V8-305 5.0L VIN F 4-bbl (1983)
Valve Body: All Technical Service Bulletins
A/T - Harsh Manual 2-1 Downshift/Delayed Downshifts
Number:
83-126
Section:
7A (VIIc)
Date:
Feb., 1984
Subject:
HARSH MANUAL 2-1 DOWNSHIFT FEEL
AND/OR DELAYED DOWNSHIFTS
Model and Year:
1982-83 ALL MODELS WITH THM 700-R4
TO:
ALL CHEVROLET DEALERS
This cancels and replaces Chevrolet Dealer Service Bulletin 84-43 dated December, 1983 which should be destroyed. This bulletin adds model codes
and separate part numbers for 1982 and 1983.
Starting March 25, 1983 (Julian Date 084), all THM 700-R4 transmissions were built using a new control valve assembly and spacer plate to correct a
harsh manual 2-1 downshift feel and/or delayed downshift condition.
Figure 1 - T.V. LIMIT PLUG
When servicing any 1982 or 1983 THM 700-R4 transmission for a harsh manual 2-1 downshift feel and/or a delayed downshift, the T.V. limit plug,
gasket-(spacer plate to case), gasket-(spacer plate to valve body), and spacer plate, must be replaced to correct this condition. (See Figure 1 for
installation of the T.V. limit plug.)
P/N
PART NAME
1982
1983
I.D.
1.
T.V. Limit Plug 8647453 8647453 ----
2.
Gasket-Spacer Plate To
Case
8642993
8642974
----
Gasket-Spacer Plate To
Valve Body
8642993
8642974
----
3.
Spacer Plate (9M2, 9M4, 9M5, 9M7, 9MB, 9MC, 9MD, 9ME, 3Y2, 3VA, 3YK) 8647455 8647455 D
4.
Spacer Plate (9YA, 9Y6, 3YH, 3Y9) 8654083 8654083 E
5.
Spacer Plate (All Others) 8647454 8647454 C
6.
Spacer Plate (9TN, 9TP, 9M6, 9MH, 3TS, 3TZ, 3T8,
3TP, 3MV, 3VJ, 3TL)
8654084
8654084
H