1993 CHEVROLET DYNASTY sensor

TRANSMISSION RANGE SWITCH
The transmission range switch is the white switch
located on the front of the transaxle, just above the
transaxle oil pan. CAUTION: Switch seal washer must be seated prop-
erly before tightening switch. Failure to do so may
result in leakage of transmission fluid (Fig. 6).
PARK/NEUTRAL POSITION SWITCH
The Park/Neutral Position Switch is the black
switch located to the right of the transmission range
switch.
CAUTION: Switch seal washer must be seated prop-
erly before tightening switch. Failure to do so may
result in leakage of transmission fluid (Fig. 7).
SPEED SENSOR-INPUT
CAUTION: When disconnecting speed sensor con-
nector, be sure that the weather seal does not fall
off or remain in old sensor.
The input speed sensor is located to the right of the
manual shift lever.
Fig. 2 Input Speed Sensor Removed
Fig. 3 Sound Cover
Fig. 4 Attaching Screws
Fig. 5 Solenoid Assembly
Fig. 6 Transmission Range Switch
21 - 102 TRANSAXLE Ä

SPEED SENSOR-OUTPUT
CAUTION: When disconnecting speed sensor con-
nector, be sure that the weather seal does not fall
off or remain in old sensor. The output speed sensor is located to the left of the
manual shift lever (Fig. 8).
TRANSMISSION CONTROL MODULE
When replacing a transmission control module, do
not interchange transmission control modules with
previous year transmission control modules. If a
same year transmission control module is being used
from a different vehicle, the following procedures
must be performed before operating the transaxle:
² Quick Learn Procedure
² Torque Converter Clutch Break-in Procedure
² Electronic Pinion Procedure
The transmission control module is located on the
passenger side of the engine compartment. It is held
in place by four mounting screws. If the transmission control module has been
replaced, the following procedures must be per-
formed:
² ``Quick Learn Procedure''. This procedure will al-
low the transmission control module to learn the
characteristics of the vehicle.
² ``Electronic Pinion Procedure''. This procedure will
reprogram settings within the transmission control
module to compensate for different tire sizes and fi-
nal drive ratios.
² ``Converter Clutch Break-In Procedure'' This proce-
dure will reset the torque converter clutch status.
REMOVAL AND INSTALLATION
(1) Loosen 60 way retaining screw, located in the
center of the 60 way connector. Then disconnect the
60 way connector on transmission control module. (2) Remove transmission control module mounting
screws and lift module from vehicle. To install, reverse removal procedure.
TRANSAXLE QUICK LEARN PROCEDURE
The quick learn procedure requires the use of the
DRB II scan tool and the 1993 DRB II scan tool car-
tridge. This program allows the electronic transaxle sys-
tem to recelebrate itself to provide the best possible
transaxle operation. The quick learn procedure
should be performed if any of the following proce-
dures are performed:
² Transaxle Assembly Replacement
² Transmission Control Module Replacement
² Solenoid Pack Replacement
² Clutch Plate and/or Seal Replacement
² Valve Body Replacement or Recondition
(1) Plug the DRB II scan tool into the blue CCD
Buss connector. The connector is located under the
instrument panel on the drivers side of the vehicle. (2) Insert the 1993 DRB II scan tool cartridge into
the DRB II scan tool. (3) The red and green lights on the DRB II scan
tool will light up and then begin flashing. Wait until
the lights stop flashing before continuing with this
procedure. (4) Press the number 4 key on the DRB II scan
tool key pad. Item number 4 will not appear on the
DRB II scan tool screen unless you scroll down. It is
not necessary to scroll down to be able to choose item
4. (5) Press the number 2 on the DRB II scan tool
key pad (Transmission). (6) Press the number 1 on the DRB II scan tool
key pad. Wait for the DRB II scan tool to perform the
following three tests before continuing (These tests
are done automatically by the DRB II scan tool).
² Buss Test
² Initialize
² Controller Part Number
Fig. 7 Park/Neutral Position Switch
Fig. 8 Output Speed Sensor
Ä TRANSAXLE 21 - 103

(7) Press the number 5 on the DRB II scan tool
key pad (Adjustments). (8) Press the number 3 on the DRB II scan tool
key pad (Quick Learn). Then follow the instructions
on the DRB II scan tool screen.
PINION FACTOR PROCEDURE
The vehicle speed readings for the speedometer are
taken from the output speed sensor. Because of dif-
ferent tire sizes and final drive ratios, the transmis-
sion control module must be calibrated to reflect the
different combinations of equipment. A procedure has
been developed called Pinion Factor. It allows the
technician to set the transmission control module ini-
tial setting so that the speedometer readings will be
correct. Failure to perform this procedure will cause a ``No
Speedometer Operation'' condition. This procedure must be performed if the transmis-
sion control module has been replaced. To properly read or reset the Pinion Factor, it is
necessary to use a DRB II scan tool. Perform the fol-
lowing steps with the DRB II scan tool to read or re-
set the Pinion Factor: (1) Plug the DRB II scan tool into the blue CCD
Bus connector. The connector is located under the in-
strument panel on the drivers side of the vehicle. (2) Insert the 1993 DRB II scan tool cartridge into
the DRB II scan tool. (3) The red and green lights on the DRB II scan
tool will light up and then begin flashing. Wait until
the lights stop flashing before continuing with this
procedure. (4) Press the number 4 key (Select System) on the
DRB II scan tool key pad. Item number 4 will not ap-
pear on the DRB II scan tool screen unless you scroll
down. It is not necessary to scroll down to be able to
choose item 4. (5) Press the number 2 on the DRB II scan tool
key pad (Transmission). (6) Press the number 1 on the DRB II scan tool
key pad. Wait for the DRB II scan tool to perform the
following three tests before continuing (These tests
are done automatically by the DRB II scan tool).
² Bus Test
² Initialize
² Transmission Control Module Part Number
(7) Press the number 5 on the DRB II scan tool
key pad (Adjustments). (8) Press the number 2 on the DRB II scan tool
key pad (Pinion Factor). Then follow the instructions
on the DRB II scan tool screen.
TORQUE CONVERTER CLUTCH BREAK-IN
PROCEDURE
A torque converter clutch break-in program is be-
ing used on all models with a 41TE. This program
will properly condition the torque converter clutch. This will eliminate shudder during partial torque
converter clutch operation on a new torque converter.
If the torque converter is replaced, the new clutch
within the torque converter will require break-in.
The current break-in status stored in the transmis-
sion control module will have to be reset to the start
of break-in with the DRB II scan tool. If a new transmission control module is put on the
vehicle, the status will be at the start of break-in.
This status is acceptable regardless of the mileage on
the torque converter. No modification of the break-in
status is required. To properly service these vehicles, it is necessary to
use a DRB II scan tool to read or reset the break-in
status. Perform the following steps with the DRB II
scan tool to reset the break-in status: (1) Plug the DRB II scan tool into the blue CCD
Bus connector. The connector is located under the in-
strument panel on the drivers side of the vehicle. (2) Insert the 1993 DRB II scan tool cartridge into
the DRB II scan tool. (3) The red and green lights on the DRB II scan
tool will light up and then begin flashing. Wait until
the lights stop flashing before continuing with this
procedure. (4) Press the number 4 key (Select System) on the
DRB II scan tool key pad. Item number 4 will not ap-
pear on the DRB II scan tool screen unless you scroll
down. It is not necessary to scroll down to be able to
choose item 4. (5) Press the number 2 on the DRB II scan tool
key pad (Transmission). (6) Press the number 1 on the DRB II scan tool
key pad. Wait for the DRB II scan tool to perform the
following three tests before continuing (These tests
are done automatically by the DRB II scan tool).
² Bus Test
² Initialize
² Transmission Control Module Part Number
(7) Press the number 5 on the DRB II scan tool
key pad (Adjustments). (8) Press the number 1 on the DRB II scan tool
key pad (Reset LU Clutch). The DRB II scan tool will
display one of three screens. (a) LU Clutch Break-in Status: Start
(b) LU Clutch Break-in Status: In-progress
Press ENTER to Reset Break-in status (c) LU Clutch Break-in Status: CompletePress
ENTER to Reset Break-in status
If screen (a) appears, the transmission control mod-
ule is at the beginning of its break-in program. No
further action is required. If screen (b) appears, the transmission control mod-
ule is in the middle of a its break-in program. Press
the enter key on the DRB II scan tool key pad to re-
turn the status to the start of break-in.
21 - 104 TRANSAXLE Ä

CAUTION: Be sure input speed sensor is removed
before removing oil pump.
CAUTION:The cooler bypass valve must be re-
placed if a transaxle failure has occurred. Do not re- use old valve or attempt to clean old valve. When
installing bypass valve, insert with O-ring end to-
wards rear of case.
Fig. 17 Remove Oil Pump
Fig. 18 Oil Pump Removed
Fig. 19 Oil Pump Gasket
Fig. 20 Remove Bypass Valve
Fig. 21 No.1 Caged Needle Bearing
Fig. 22 Input Clutches Assembly
21 - 108 TRANSAXLE Ä

Press down clutch pack with finger and zero dial
indicator. Low/Reverse clutch pack clearance is
1.04 to 1.65mm (.042 to .065 inch). Select the proper low/reverse reaction plate to
achieve specifications:
Press down clutch pack with finger and zero dial
indicator. The 2/4 clutch pack clearance is 0.76 to
2.64mm (.030 to .104 inch). If not within specifica-
tions, the clutch is not assembled properly. There is
no adjustment for the 2/4 clutch clearance.
DETERMINING NO. 4 THRUST PLATE THICKNESSÐINPUT SHAFT END PLAY
To determine the proper thickness of the No. 4 thrust
plate, select the thinnest No. 4 thrust plate. Using
petrolatum (Fig. 87) to hold thrust plate in position,
install input clutches assembly. Be sure the input
clutches assembly is completely seated (Fig. 88).
CAUTION: If view through input speed sensor hole is
not as shown above, the input clutches assembly is
not seated properly.
By removing the oil pump O-ring, you will be able to
install and remove the oil pump and gasket very easily
to select the proper No. 4 thrust plate. CAUTION: Be sure to reinstall O-ring on oil pump
after selecting the proper No. 4 thrust plate.
Input shaft end play must be .005 to .025 inch.
LOW/REVERSE REACTION PLATE CHART
Fig. 88 Check 2/4 Clutch Clearance
Fig. 89 Select Thinnest No. 4 Thrust Plate
Fig. 90 View Through Input Speed Sensor Hole
Fig. 91 Remove Oil Pump O-Ring
21 - 120 TRANSAXLE Ä

INBOARD BUCKLE/CENTER OCCUPANT BELTS REMOVAL (FIG. 40)
Vehicles equipped with front bucket seats with cen-
ter console do not have center occupant belts. (1) Remove bolt holding inboard buckle/center oc-
cupant belt to floor. (2) Disconnect seat belt sensor wire connector.
(3) Separate buckle/belt assembly from vehicle.
INBOARD BUCKLE/CENTER OCCUPANT BELT INSTALLATION
Reverse the preceding operation.
REAR SEAT BELTS
OUTBOARD SHOULDER HARNESS/LAP BELTREMOVAL (FIG. 41)
(1) Remove quarter trim panel.
(2) Remove bolt holding lap belt to floor at wheel-
house kickup. (3) Remove bolt holding seat belt retractor to quar-
ter panel.
OUTBOARD SHOULDER HARNESS/LAP BELT INSTALLATION
Reverse the preceding operation.
INBOARD BUCKLE/CENTER OCCUPANTBELTS REMOVAL (FIG. 41)
(1) Remove rear seat cushion.
(2) Remove bolt holding inboard buckle/center oc-
cupant belt to floor. (3) Separate buckle/belt assembly from vehicle.
INBOARD BUCKLE/CENTER OCCUPANT BELTINSTALLATION
Reverse the preceding operation.
FRONT SEATS
REMOVAL (FIG. 42 OR 43)
(1) Position seat full forward.
(2) Remove screws holding rear track riser covers
and separate covers from tracks. (3) On power seat track, remove outboard track
cover. (4) On 50/50 seats, remove inboard seat belt at-
taching bolt from floor. (5) Remove nuts holding seat track to floor.
(6) Position seat full rearward.
(7) On power seat track, remove door sill scuff
plate and disconnect wire connector. (8) Remove bolts holding seat track to cross mem-
ber. (9) Remove seat from vehicle.
INSTALLATION
Reverse the preceding operation.
REAR SEATS
REAR SEAT CUSHION REMOVAL
(1) Remove bolts holding cushion to floor.
(2) Push center occupant seat belts through open-
ings in cushion. (3) Remove cushion from vehicle.
REAR SEAT CUSHION INSTALLATION
Reverse the preceding operation.
Fig. 40 Front Seat Belts
Fig. 41 Rear Seat Belts
23 - 28 AA-BODY Ä

(2) Remove rear shoulder harness turning loop
cover. Remove bolt holding turning loop to quarter
panel. (3) Remove rear seat cushion and back.
(4) Remove push-in fastener holding quarter trim
to roof rail. (5) Remove screws holding quarter trim panel to
wheelhouse kickup. (6) Pull trim panel away from C-pillar and sepa-
rate from vehicle.
INSTALLATION
Reverse the preceding operation.
REAR SHELF TRIM PANEL
REMOVAL (FIG. 22)
(1) Remove one quarter trim panel.
(2) Remove center high mounted stop lamp cover.
Refer to Group 8L, Lamps for instructions. (3) Disengage fasteners holding trim to shelf panel
and separate trim from vehicle.
INSTALLATION
Reverse the preceding operation.
FRONT SEAT BELTS
OUTBOARD SHOULDER HARNESS/LAP BELT REMOVAL (FIG. 23)
(1) Remove B-pillar trim panel.
(2) Remove bolt holding seat belt retractor to
B-pillar. (3) Separate retractor from vehicle.
OUTBOARD SHOULDER HARNESS/LAP BELT
INSTALLATION
Reverse the preceding operation.
INBOARD BUCKLE/CENTER OCCUPANTBELTS REMOVAL (FIG. 23)
Vehicles equipped with front bucket seats with cen-
ter console do not have center occupant belts. (1) Remove bolt holding inboard buckle/center oc-
cupant belt to floor. (2) Disconnect seat belt sensor wire connector.
(3) Separate buckle/belt assembly from vehicle.
INBOARD BUCKLE/CENTER OCCUPANT BELT INSTALLATION
Reverse the preceding operation.
REAR SEAT BELTS
OUTBOARD SHOULDER HARNESS/LAP BELTREMOVAL (FIG. 24)
(1) Remove quarter trim panel.
(2) Remove bolt holding lap belt to floor at wheel-
house kickup. (3) Remove bolt holding turning loop to inner
quarter panel. (4) Remove bolt holding seat belt retractor to quar-
ter panel.
OUTBOARD SHOULDER HARNESS/LAP BELT INSTALLATION
Reverse the preceding operation.
Fig. 22 Interior Mouldings, Panels, and Trim Covers
Ä AC-BODY 23 - 47

(5) Remove bolt holding belt retractor to quarter
panel. (6) Separate belt from vehicle.
OUTBOARD SHOULDER HARNESS/LAP BELTINSTALLATION
Reverse the preceding operation.
INBOARD BUCKLE REMOVAL (FIG. 26)
(1) Remove bolt holding inboard buckle to floor. (2) Disconnect seat belt sensor wire connector, if
equipped. (3) Separate buckle assembly from vehicle.
INBOARD BUCKLE INSTALLATION
Reverse the preceding operation.
REAR SEAT BELTS
REAR OUTBOARD SHOULDER HARNESS/LAPBELT REMOVAL (FIG. 27)
(1) Remove lower and upper quarter trim panel.
(2) Remove bolt holding lap belt anchor to floor at
wheelhouse kickup. (3) Remove bolt holding seat belt retractor to quar-
ter panel.
REAR OUTBOARD SHOULDER HARNESS/LAP BELT INSTALLATION
Reverse the preceding operation.
REAR INBOARD BUCKLE REMOVAL (FIG. 27)
(1) Lift seat belt buckle anchor cover to expose
bolt. (2) Remove bolt holding inboard buckle/center oc-
cupant belt to seat frame. (3) Separate buckle from vehicle.
Fig. 24 Interior Mouldings, Panels, and Trim Covers
Fig. 25 Lift Gate Trim
23 - 62 AG-BODY Ä