Saturn Transmission. Manual - part 27

 

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Saturn Transmission. Manual - part 27

 

 

2

1

0

0

3

2

8

9

3RD DESIGN CONTROL

ACTUATOR SOLENOIDS

1997-1999

No longer available

White Plastic Tops

For Identification

"Screens Added"

Part Number

21003289

Measures 4.0 to 6.0

Ohms Resistance

4th DESIGN CONTROL

ACTUATOR SOLENOIDS

ALL MODELS

Measures 4.0 to 6.0

Ohms Resistance

No Color

or Black Top

Plastic cap

Part Number

21003344

Figure 3

Copyright © 2005 ATSG

111

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information

21

00

25

09

21

00

32

89

21

00

25

09

21

00

32

89

21

00

32

89

 SATURN VALVE BODY

ACTUATOR LOCATIONS

Figure 4

Copyright © 2005 ATSG

LINE PRESSURE

ACTUATOR

2nd GEAR

ACTUATOR

TORQUE CONVERTER

CLUTCH ACTUATOR

3rd GEAR

ACTUATOR

4th GEAR

ACTUATOR

112

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information

Copyright © 1999 ATSG

SATURN

ERRATIC SHIFT PATTERN, AFTER REBUILD

OR AFTER REPROGRAMING PCM

COMPLAINT:

CAUSE:

CORRECTION:

After rebuild,

 the vehicle exhibits one of the following "Erratic Upshift" patterns:

      A.  Shifts 1st to 3rd, with no 2nd or 4th.
      B.  Starts in 2nd, with no 1st, and upshifts to 3rd and 4th.
      C.  Shifts from 1st to 4th, with no 2nd or 3rd.
This condition usually occurs after one complete upshift pattern from 1st to 2nd to 3rd to 4th, 
and will normally store one or more of the following Diagnostic Trouble Codes (DTC), 
depending on the particular "Gear Ratio Error":

1991-1995 Model Years
DTC 16 = No 1st Gear
DTC 18 = No Gears Available
DTC 22 = No 2nd Gear
DTC 23 = No 3rd Gear
DTC 24 = No 4th Gear

1996-2000 Model Years
DTC P0730 = No Gears Available
DTC P0731 = No 1st Gear
DTC P0732 = No 2nd Gear
DTC P0733 = No 3rd Gear
DTC P0734 = No 4th Gear

These Diagnostic Trouble Codes may be set after replacing the complete transaxle assembly, 
after replacing individual gear components, or after reprograming the PCM.

The cause may be, a mis-match of gear train parts (Drive and Driven Gears), between the 1st 
design "MP6" Base Transaxle, and the 2nd design "MP6" Base Transaxle, or the "MP7" 
Performance Transaxle.
Another cause may be, incorrect calibration installed due to a wrong VIN in the PCM.  If the 
wrong calibration has been installed, a gear ratio table may be used by the PCM which will 
not match the actual gear ratios and result in DTCs setting.

When rebuilding a Saturn transaxle, and gear train replacement is necessary, ensure that the 
replacement gears have the exact same tooth counts as the originals.  Refer to the charts in 
Figures 1 and 2 for the proper gear tooth counts for the model that you are rebuilding.
Important  Note:

   Refer  to  Figure  3  to  identify  the  transaxle  design  level  and  type  of 

transaxle.  They are as follows: "MP6" Base = 1st Design
                                                   "MP6" Base (With "SV") = 2nd Design
                                                   "MP7" = Performance Version

If the incorrect calibration or VIN information has been written to the PCM, reprogram the 
PCM with the proper VIN and calibration information.  Compare the VIN plate on the dash 
to VIN identified in the PCM.  Obviously they must match.

113

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information

Copyright © 1999 ATSG

GEAR TOOTH COUNTS AND GEAR RATIOS

All SOHC Engines Use MP6 Transaxle

  *  Vehicles built prior to, and including VIN PZ156139
**  Vehicles built after, and including VIN PZ156140

1991-1993

1st Design*

MP6 Base

1st Drive

2nd Drive

3rd Drive

4th Drive

Reverse Drive

Output Shaft

21

19

19

19

19

47

48

48

48

48

30

30

30

27

27

38

38

38

42

42

37

37

37

33

33

30

30

30

34

34

42

42

42

40

40

25

25

25

28

28

21

21

21

21

21

40

40

40

40

40

15

15

15

16

16

62

2.24

1.27

0.81

0.60

2.35

4.13

4.13

4.13

4.06

4.06

2.35

2.35

2.35

2.35

0.60

0.60

0.70

0.70

0.81

0.81

1.27

1.27

1.56

1.03

1.03

1.56

2.53

2.53

2.53

2.53

62

62

65

65

1st Driven

2nd Driven

3rd Driven

4th Driven

Reverse Driven

Ring Gear

1st Gear

2nd Gear

3rd Gear

4th Gear

Reverse Gear

Final Drive

GEAR

1993-1994

2nd Design**

MP6 Base

1995-1999

2nd Design

MP6 Base

1991-1994

Performance

MP7 Base

1995-1999

Performance

MP7 Base

All SOHC Engines Use MP6 Transaxle

Figure 1

114

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information

 

 

 

 

 

 

 

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