GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Inspect the first gear thrust bearing.

Is the bearing missing or showing too much end play?

--

Go to Step 2

Go to Step 3

2

Repair or replace the bearing as needed.

Does the transaxle still slip out of gear?

--

Go to Step 3

System OK

3

Inspect the first gear washer.

Is the washer missing or show too much end play?

--

Go to Step 4

Go to Step 5

4

Repair or replace the washer.

Does the transaxle still slip out of gear?

--

Go to Step 5

System OK

5

Inspect the first gear spline lock on the 1st/2nd synchronizer sleeve or the hub.

Is the spline lock worn or damaged?

--

Go to Step 6

Go to Step 7

6

Repair or replace the lock.

Does the transaxle still slip out of gear?

--

Go to Step 7

System OK

7

Inspect the 2nd gear spline lock on the 1st/2nd synchronizer sleeve or the hub.

Is the lock worn or damaged?

--

Go to Step 8

Go to Step 9

8

Repair or replace the lock.

Does the transaxle still slip out of gear?

--

Go to Step 9

System OK

9

Inspect the 3rd gear spline lock on the 3rd/4th synchronizer sleeve or hub.

Is the lock worn or damaged?

--

Go to Step 10

Go to Step 11

10

Repair or replace the lock.

Does the transaxle still slip out of gear?

--

Go to Step 11

System OK

11

Inspect the 4th gear spline lock on the 3rd/4th synchronizer sleeve or hub.

Is the lock worn or damaged?

--

Go to Step 12

Go to Step 13

12

Repair or replace the 4th gear spline lock.

Does the transaxle still slip out of gear?

--

Go to Step 13

System OK

13

Inspect the 5th gear spline lock on the 5th synchronizer sleeve.

Is the spline lock damaged or worn?

--

Go to Step 14

Go to Step 15

14

Repair or replace the 5th gear spline lock.

Does the transaxle still slip out of gear?

--

Go to Step 15

System OK

15

Inspect the reverse gear spline lock.

Is the lock damaged or worn?

--

Go to Step 16

Go to Step 17

16

Repair or replace the lock.

Does the transaxle still slip out of gear?

--

Go to Step 17

System OK

17

Disassemble the transaxle. Refer to the M86/M94 Section of the Transmission Unit Repair Manual.

Does the transaxle still slip out of gear?

--

--

System OK