A/T - Soft or Slipping 1st-2nd Gear Shift

Bulletin No. T 85-8
File In Group 7
Number 111
Date Sept. '84

SUBJECT: SOFT OR SLIPPING 1-2 SHIFT

MODELS AFFECTED: 1983 AND 1984 DEVILLES AND BROUGHAMS EQUIPPED WITH 5.7L DIESEL ENGINE AND THM 200-4R TRANSMISSION

FIGURE 1 - THM 200-4R TRANSMISSION I.D. NAMEPLATE LOCATION:

FIGURE 2 - THM 200-4R TRANSMISSION I.D. NAMEPLATE THREE RIVERS, MICHIGAN:

Some 1983 and certain 1984 DeVilles and Broughams equipped with a 5.7L diesel engine and OM model THM 200-4R transmission may experience a soft or slipping 1-2 shift.

Beginning May 7, 1984 (Julian Date 129), the parts in the service package listed below went into production to correct this condition.

Service Package 8639915 for the OM model transmission contains:

1 Control Valve Body Assembly 1 3-4 Accumulator Spring

To correct a soft or slipping 1-2 shift on all 1983 and those 1984 model year OM model transmissions built before Julian Date 129, (Refer to Figures 1 and 2 on reverse side of bulletin for transmission identification information) remove the control valve body assembly and the 3-4 accumulator spring from the transmission. Replace them with the control valve body assembly and the 3-4 accumulator spring provided in the service package.
For warranty purposes, use Labor Operation No. K6560 at 1.1 hours.