Regal V6-231 3.8L Turbo VIN 9 FI (1984)
Throttle Valve: All Technical Service Bulletins
A/T - Harsh 1st-2nd and/or 3rd-4th Gear Shifts
Bulletin 84-7200-10
Date
Nov. '84
Ref. No. 85-047-7200
SUBJECT:
HARSH 1-2 AND/OR 3-4 SHIFTS
MODELS AFFECTED: ALL 1984 MODEL THM 200-4R TRANSMISSION
Some 1984 THM 200-4R transmissions may exhibit a harsh 1-2 and/or 3-4 shift. This harsh 1-2 and/or 3-4 shift may be caused by a damaged or
mispositioned T.V. Boost valve spring.
Starting April, 1984, a new control valve assembly which has a new T.V. Boost valve spring went into production on all 1984 model THM 200-4R
transmissions to correct this harsh 1-2 and/or 3-4 shift. (Refer to Chart 1 for part numbers and model applications and Chart 2 for Julian date break
points showing when the new control valve assembly went into production.)
On transmissions built before the Julian dates in Chart 2, if a condition of harsh 1-2 and/or 3-4 shift is experienced and the cause is the damaged or
mispositioned T.V. Boost valve spring, use the new control valve assembly.
FIGURE 1
The Julian date is shown on the nameplate (fig. 1). The nameplate is attached to the right rear side of the transmission case.
CHART 1
NEW CONTROL VALVE ASSEMBLY MODEL AND PART NUMBER APPLICATIONS
MODELS
CONTROL VALVE ASSEMBLY
PART NUMBERS
BQ
8639914
BT, BY
8639912
OF
8639326
OG
8639452
OJ
8639462
OM
8639915
CHART 2
JULIAN DATE BREAKPOINTS WHEN NEW CONTROL VALVE ASSEMBLY WENT INTO PRODUCTION
MODEL
JULIAN DATE
BQ
109
BT
115
BY
121
OG
110
OJ
114
OM
129
NOTE:
Models not listed will have the new control valve spring assembly when they are produced.