Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCADILLAC1991FLEETWOOD FWD V8-300 4.9LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTRANSMISSION POSITION SENSOR/SWITCHADJUSTMENTS
1991 Cadillac Fleetwood FWD V8-300 4.9L
Transmission Position Sensor/Switch: Adjustments
1991 Cadillac Fleetwood FWD V8-300 4.9LSECTION Adjustments
NEUTRAL START AND BACK-UP LAMP SWITCH
REMOVE OR DISCONNECT
1. Remove the shift linkage, electrical connector and vacuum hose.
2. Attaching nut and shift lever.
3. Fuel line bracket and screw.
4. Assembly screws and switch.
INSTALL OR CONNECT
1. To reassemble, reverse steps 1 thru 4 listed above.
2. Torque the assembly screws to 27 Nm (20 lb ft).
^ The neutral start and back-up lamp switch should be adjusted so that the engine will start in "PARK" or "NEUTRAL" only.
CAUTION: Personal injury may result if the engine can be started in a drive position.
ADJUST
1. Place transaxle manual linkage lever shaft (12) in the "NEUTRAL" position. Ensure proper shift control adjustment.
2. Loosen switch attaching screws (16).
3. Rotate switch (13) on shifter assembly to align service adjustment hole with carrier tang hole.
^ Insert 2.34 mm (3/32") max. diameter gage pin to a depth of 12 mm (15/32").
TIGHTEN
^ Two attaching screws (16) to 27 Nm (20 lb ft).
4. Remove gage pin.
NOTICE: When servicing requires that T-latch type wiring connector be disconnected, care must be taken to insure proper reassembly of the connector. Failure to do so may result in an intermittent failure of the switch.
Neutral Start & Backup Lamp Switch - Removal And Adjustment:
REMOVE OR DISCONNECT
1. Remove the shift linkage, electrical connector and vacuum hose.
2. Attaching nut and shift lever.
3. Fuel line bracket and screw.
4. Assembly screws and switch.
INSTALL OR CONNECT
1. To reassemble, reverse steps 1 thru 4 listed above.
2. Torque the assembly screws to 27 Nm (20 lb ft).
^ The neutral start and back-up lamp switch should be adjusted so that the engine will start in "PARK" or "NEUTRAL" only.
CAUTION: Personal injury may result if the engine can be started in a drive position.
ADJUST
1. Place transaxle manual linkage lever shaft (12) in the "NEUTRAL" position. Ensure proper shift control adjustment.
2. Loosen switch attaching screws (16).
3. Rotate switch (13) on shifter assembly to align service adjustment hole with carrier tang hole.
^ Insert 2.34 mm (3/32") max. diameter gage pin to a depth of 12 mm (15/32").
TIGHTEN
^ Two attaching screws (16) to 27 Nm (20 lb ft).
4. Remove gage pin.
NOTICE: When servicing requires that T-latch type wiring connector be disconnected, care must be taken to insure proper reassembly of the connector. Failure to do so may result in an intermittent failure of the switch.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.