Saturn Transmission. Manual - part 26

SATURN

 

TAAT

GRIND OR BIND IN REVERSE

COMPLAINT:

CAUSE:

CORRECTION:

After  overhaul,  Saturn  vehicles  equipped  with TAAT  transaxles,  may  exhibit  a  grinding 
condition on Reverse application or a binding condition in Reverse.

The cause may be, during the rebuilding the Dog Clutch Sleeve or the Dog Clutch Hub, as 
shown in Figure 1, were installed incorrectly.

Figure 1

DOG CLUTCH HUB

DOG CLUTCH SLEEVE

Copyright © 2006 ATSG

The Dog Clutch Hub must be installed with the "Wide" end of the "Slots" towards the 2nd 
Driven Gear, as shown in Figure 2.
The Dog Clutch Sleeve must be installed with the I.D. groove towards the Reverse Driven 
Gear, as shown in Figure 2.

107

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information

Figure 2

I.D. GROOVE TORWARD

REVERSE DRIVEN GEAR

WIDE END OF SLOTS

GO TOWARDS THE

2ND DRIVEN GEAR

OUTPUT

SHAFT

4TH SPEED

DRIVEN GEAR

3RD SPEED

DRIVEN GEAR

2ND SPEED

DRIVEN GEAR

1ST SPEED

DRIVEN GEAR

REVERSE

DRIVEN GEAR

DOG CLUTCH SLEEVE

DOG CLUTCH HUB

Copyright © 2006 ATSG

108

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information

SATURN

NEW ACTUATORS FOR 2000

CHANGE:

REASON:

PARTS AFFECTED:

INTERCHANGEABILITY:

SERVICE INFORMATION:

Beginning in the 2000 model year a 4th design Actuator was introduced to supercede all previous 
design Actuators. This change involves a complete redesign of the Actuator at the screened end.

Reduces the possibility for debris to stick a control actuator valve.

(1) ACTUATORS - 4th Design now has redesigned screens added to the control pressure side of the 

actuators as illustrated in Figure 1, and has the same resistance values as the 2nd and 3rd Design 
actuators,  and  is  identified  without  the  previous  design  plastic  top  or  is  called  the  Black Top 
Actuator. The 1st and 2nd Design actuator are shown in Figure 2.  The 3rd and 4th  Design actuator 
are  shown in Figure 3. Actuator locations on the valve body are shown in Figure 4.

The 4th Design Actuator is the only

 Actuator that is available and will retrofit to previous models.

4TH DESIGN ACTUATOR............................................................................................21003344

Copyright © 2005 ATSG

4th DESIGN  ACTUATOR

New design plastic

cap and screens

Figure 1

109

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information

2

1

0

0

2

2

4

8

2

1

0

0

2

5

0

9

2ND DESIGN CONTROL

ACTUATOR SOLENOIDS

 1993-1996

No longer available

1ST DESIGN CONTROL

ACTUATOR SOLENOIDS

 1991-1992

No longer available

Red Plastic Tops

For Identification

Black or Blue Plastic Tops

For Identification

"No Screens"

Part Number

21002248

"No Screens"

Part Number

21002509

Figure 2

Measures 2.5 to 4.5

Ohms Resistance

Measures 4.0 to 6.0

Ohms Resistance

Copyright © 2005 ATSG

110

AUTOMATIC TRANSMISSION SERVICE GROUP

Technical Service Information