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 MANUALSCADILLAC1991SEVILLE STSREPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSOVERHAUL & TESTING - 4T60
1991 Cadillac Seville STS
Overhaul & Testing - 4T60
1991 Cadillac Seville STSSECTION Overhaul & Testing - 4T60
- Application
- Identification
- Description
- Lubrication & Adjustments
- On-Vehicle Service
- Trouble Shooting
- Testing
- Removal & Installation
- Torque Converter
- Transaxle Disassembly
- Notes
- Torque Converter
- Lower Transaxle Assembly
- Servo Assemblies
- Oil Pump & Valve Body
- Channel Plate Assembly, 4TH Clutch & Driven Sprocket Support
- Case Extension & Speed Sensor
- Output Shaft
- Input & 2ND Clutch Assemblies
- Final Drive End Play Measurement
- Case Extension, Final Drive & Final Drive Sun Gear Shaft
- Input Clutch Assembly, Reverse Band, 3RD Roller Clutch & Sprag Assembly
- 2-1 Band, Reaction Sun Gear & Drum, 1-2 Support Assembly & Forward Band
- Detent Lever, Manual Shaft & Actuator Guide
- Component Disassembly & Reassembly
- Notes
- Transaxle Case
- Drive Sprocket Support Bearing
- Converter Seal & Drive Sprocket Support
- Final Drive Assembly
- Final Drive Internal Gear & Final Drive Assembly
- Final Drive End Play Measurement
- Final Drive Sun Gear Shaft, Thrust Bearing & Forward Band
- 1-2 Support Assembly & 1-2 Roller Clutch
- Manual Band & Reaction Gear & Sun Drum
- Reaction Carrier, Input Carrier & Reverse Reaction Drum
- 3RD Roller Clutch, Input Sprag & Input Sun Gear
- Input Clutch & 3RD Clutch
- 2ND Clutch
- Driven Sprocket Support
- 4TH Clutch & 2ND Clutch Air Check
- Input Clutch End Play Check
- Reverse Band, 2ND Clutch & Driven Sprocket Support
- Output Shaft
- Turbine Shaft Seal Replacement
- Drive Sprockets & Drive Links
- 4TH Clutch & 4TH Clutch Shaft
- Channel Plate Assembly
- Control Valve Assembly
- Control Valve Assembly Spacer Plate, Gaskets & Oil Pump Drive Shaft
- Oil Pump Assembly
- Oil Pump Assembly, Wiring Harness & Case Side Cover
- 2-1 Manual Servo Assembly
- 1-2 & 2-3 Accumulator Assembly
- 2-1 Manual Servo & 1-2 & 2-3 Accumulator Assembly
- THERMO Element Replacement
- Scavenging Scoop, Filter Assembly & Oil Pan
- Forward Servo Assembly
- Reverse Servo Assembly
- Speed Sensor
- Modulator Assembly
- Transmission Assembly Views
- Torque Specifications
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.