THM 200-4R TRANSMISSION NEW PRODUCT INFORMATION. Buick Electra Estate Wagon 1989

For 1990-2009 cars

# THM 200-4R TRANSMISSION NEW PRODUCT INFORMATION

TRANSMISSION APPLICATIONS: SUBJECT: ------------------------- ------- 1989 THM 200-4R (MW9) 1989 THM 200-4R TRANSMISSION NEW PRODUCT INFORMATION

TRANSMISSION MODELS: VEHICLE APPLICATIONS: ------------------- -------------------- ALL B AND D CARS

#### Bulletin Covers:

New Product Information for all 1989 THM 200-4R transmissions. The information contained in this bulletin describes changes that have occurred in the 1989 THM 200-4R transmission. Refer to each section of this bulletin for specific product change information.

DATE OF PRODUCTION CHANGE: (Figure 1) -------------------------- Beginning with 1989 Start of Production, all 1989 THM 200-4R transmissions were built with the product changes explained in this bulletin.

#### SERVICE MANUAL REFERENCE:

Changes listed in this bulletin as "Service Manual Update" will note changes made since publication of the 1989 Service Manual and should be noted in your 1989 Service Manual accordingly.

Other changes described in this bulletin are included in your 1989 THM 200-4R Service Manual Sections. Be certain to familiarize yourself with these changes to properly service the 1989 THM 200-4R transmission.

#### SUBJECT: -------- Service Manual Update - 1989 THM 200-4R Shift Speed And Transmission Pressure Charts

#### SERVICE MANUAL REFERENCE:

This information (Figures 2 and 3) has been updated since publication of the 1989 Service Manual. Use this information to update the 1989 THM 200-4R Automatic Transmission Diagnosis Section.

#### SUBJECT: -------- New THM 200-4R Solenoid Assembly

TRANSMISSION MODELS: CTF, CUF

#### CHANGE TO ASSEMBLY COMPONENTS:

Beginning with the 1989 model year the CTF and CUF 200-4R models were built with a new solenoid assembly (refer to Figure 4). The new solenoid assembly no longer uses the 4-3 pulse switch. The new solenoid assembly, listed under "Service Parts Information", should be used when servicing any 1989 CTF or CUF models.

#### SERVICE PARTS INFORMATION:

Part No. Description -------- ----------- 8639961 Solenoid Assembly - CTF and CUF Models

Parts are currently available from CANSPO.

#### SERVICE MANUAL REFERENCE:

This information is included in the 1989 THm 200-4R Automatic Transmission Diagnosis Section.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.