SERVICE MAN. UPDATE-SEC.7A/7B SPEEDOMETER DRIVEN GEAR

VEHICLES AFFECTED: 1989-90 "M" SPRINT/FIREFLY

This bulletin is an addition to Section 7A of the 1989 and 1990 Sprint/Firefly Service Manuals. (ST370-89 and ST370-90). This bulletin also cancels and supersedes the speedometer driven gear procedure found in Section 7B, page 7B-8, and Figure 18 found on page 7B-11.

SPEEDOMETER DRIVEN GEAR - Remove or Disconnect

Tools Required:

J-34839 - Seal Remover J-37764 - Adapter J-23907 - Slide Hammer

1. Battery negative (-) cable.

* Pull speedometer cable boot up from the driven gear housing.

2. Speedometer cable case clip.

3. Speedometer cable from the driven gear housing.

4. Speedometer driven gear housing retaining bolt.

5. Speedometer driven gear housing from transaxle case.

6. Roll pin from housing using a 2.8 to 3.0mm (0.11 to 0.12 inch) diameter punch and a hammer.

7. Speedometer driven gear from housing.

8. O-ring seal from outside of housing.

9. Lip seal from inside of housing using a J-34839 seal remover with a J-37764 adapter and a J-23907 slide hammer as shown in Figure 1.

Inspect

*Speedometer driven gear and housing for excessive wear or distortion. Replace as necessary.

Install or Connect

Tool Required: J-34857 Seal Installer

1. Speedometer driven gear into housing.

2. Roll pin through housing.

* Apply GM #5264009 lubricant to new lip seal.

3. New lip seal into housing using a J-34857 seal installer and a hammer as shown in Figure 2.

4. New O-ring seal onto housing.

*Apply GM #5264009 lubricant to O-ring seal.

5. Speedometer driven gear housing into transaxle case. Rotate driven gear with a small screwdriver to ensure proper gear mesh.

6. Speedometer driven gear housing retaining bolt.

Tighten

* Speedometer driven gear housing retaining bolt to 6 Nm (53 in.lbs.).

7. Speedometer cable to the driven gear housing.

8. Speedometer cable case clip.

*Lower speedometer cable boot over the driven gear housing.

9. Battery negative (-) cable.

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.