EXPERTEC TSB (87-T-19)

Publication date: 1987-03-26
Reference number: 87-T-19

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): 87-T-19, Date of Issue: 03/26/87

SLIP OR NO DRIVE RESULTING - FROM LOW LINE PRESSURE

Model(s): 1987 Oldsmobile Cutlass Ciera, Delta 88, Ninety-eight & Toronado

Bulletin No.: Oldsmobile 87-T-19

Date: 03/26/1987

BULLETIN ILLUSTRATION LIST

Fig 1: Graphic

Fig 2: Graphic

MODELS/YEARS

1987 CUTLASS CIERA, DELTA 88, NINETY-EIGHT AND TORONADO MODELS

BULLETIN COVERS

A slip or no drive condition on a THM 440-T4 transaxle may be caused by low line pressure due to the pump slide binding on excessive casting flash when the slide is in the low pressure position. Modulator vacuum will not affect line pressures if this condition is present. This condition can be repaired by replacing the oil pump assembly.

DATE OF PRODUCTION

(Fig 1 )

A THM 440-T4 transaxle built between November 26, 1986 (Julian Date 330) and January 12, 1987 (Julian Date 012) may exhibit this condition.

SERVICE ACTION

(Fig 2 )

Remove oil pump cover and pump priming springs and move the slide by hand. If excessive flash is present, the slide will bind in the area indicated in Fig 2 .

SERVICE PARTS INFORMATION

Refer to GMSPO catalog for part number information.

SERVICE MANUAL REFERENCE

Refer to THM 440-T4 (ME9) Automatic Tranxle Unit Repair for oil pump service information in the 1987 Chassis Service Manual.