GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Inspect the fluid level indicator in the fill port.

Is the indicator seated in the fill port and thus causing fluid leakage at the vent plug?

Go to Step 2

Go to Step 3

2

Seat the fluid level indicator in the fill port.

Is the transmission still leaking lubricant?

Go to Step 3

System OK

3

Inspect the axle shaft seals.

Are the seals worn?

Go to Step 4

Go to Step 5

4

Repair or replace the seals as needed.

Does the transmission still leak lubricant?

Go to Step 5

System OK

5

Inspect the level of lubricant in the transaxle.

Is there excessive lubricant due to improper checking of fluid?

Go to Step 6

Go to Step 7

6

Adjust the lubricant level in the transaxle.

Does the transmission still leak lubricant?

Go to Step 7

System OK

7

Inspect the input gear shaft bearing retainer.

Is the retainer loose or broken?

Go to Step 8

Go to Step 9

8

Repair or replace the input gear shaft bearing retainer as needed.

Does the transmission still leak lubricant?

Go to Step 9

System OK

9

Inspect the input gear bearing or lip seal.

Are they worn or damaged?

Go to Step 10

Go to Step 11

10

Repair or replace the input gear bearing or lip seal as needed.

Does the transmission still leak lubricant?

Go to Step 11

System OK

11

Inspect the shift lever seal.

Is the seal worn?

Go to Step 12

Go to Step 13

12

Repair or replace the seal as needed.

Does the transaxle still leak lubricant?

Go to Step 13

System OK

13

Inspect between the case and the clutch cover or loose .

Is there a lack of sealant between the case and cover or is the clutch cover loose?

Go to Step 14

Go to Step 15

14

Replace the sealant between the case and cover or tighten the clutch cover as needed.

Does the transaxle still leak lubricant?

Go to Step 15

System OK

15

Inspect the end plate.

Is the plate loose or does it lack sealant?

Go to Step 16

Go to Step 17

16

Tighten the loose plate or replace the sealant as needed.

Does the transaxle still leak lubricant?

Go to Step 17

System OK

17

Inspect the back up lamp switch.

Is the switch loose or does it lack sealant?

Go to Step 18

Go to Step 19

18

Tighten the switch or replace the sealant as needed.

Does the transaxle still leak lubricant?

Go to Step 19

System OK

19

Inspect the vehicle speed sensor.

Does the assembly contain an internal leak?

Go to Step 20

Go to the M86/M94 Section of the Transmission Unit Repair Manual

20

Repair or replace the vehicle speed sensor as needed.

Does the transaxle still leak lubricant?

Go to the M86/M94 Section of the Transmission Unit Repair Manual

System OK