GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

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