Throw-Out Bearing

Replace the throw-out bearing (clutch release bearing) by removing the transmission, transfer case, and clutch assembly to access the bearing on the input shaft.

Warnings

Tools required

Parts

• Throw-out bearing (clutch release bearing) × 1 — Use OEM specification
• Transmission input shaft seal × 1 — Use OEM specification
• Clutch slave cylinder (if applicable) × 1 — Use OEM specification
• Transmission mounting bolts (verify condition) × 1 — Use OEM specification
• Driveshaft coupling bolts (if reusable condition questionable) × 1 — Use OEM specification
• Transmission fluid drain plug washer × 1 — Use OEM specification

Fluids

• ZF Lifeguard 8 — 10 qt

Preparation

1. Raise vehicle on lift or support securely on jack stands at all four corners with wheels removed
2. Disconnect negative battery terminal and wait 10 minutes for system discharge
3. Remove engine undertray and transmission skid plates
4. Drain transmission fluid into appropriate container by removing drain plug
5. Remove exhaust system from catalytic converters back to allow clearance for transmission removal
6. Install engine support fixture across engine bay to support engine weight

Procedure

1. 1

   Disconnect driveshaft and transfer case components
   Mark driveshaft alignment to differential flange for reinstallation reference. Remove driveshaft center support bearing bolts. Disconnect rear driveshaft from differential flange and front section from transfer case output. Remove both driveshaft sections from vehicle. Disconnect transfer case electrical connectors and vent hoses.
2. 2

   Remove transmission crossmember and supports
   Support transmission with transmission jack positioned securely under transmission pan. Remove transmission crossmember mounting bolts from frame rails. Lower transmission jack slightly to relieve tension on mounts. Remove rear transmission mount bolts and remove crossmember assembly from vehicle.
3. 3

   Disconnect electrical and mechanical connections
   Disconnect transmission wire harness connectors including speed sensors, solenoid pack connector, and range sensor. Disconnect shift linkage or cable from transmission. Remove starter motor mounting bolts and secure starter aside without disconnecting wiring. Disconnect clutch hydraulic line from slave cylinder at transmission bell housing.
   ⚠Brake fluid will leak from clutch hydraulic line. Cap line immediately and have replacement fluid ready.
4. 4

   Remove transfer case from transmission
   Support transfer case with floor jack. Remove transfer case to transmission adapter mounting bolts working around perimeter. Carefully pry transfer case away from transmission using pry points. Lower transfer case and remove from under vehicle. Inspect transfer case gasket and mounting surfaces.
5. 5

   Remove transmission bell housing bolts
   Remove all transmission bell housing to engine block mounting bolts. There are typically 6-8 bolts of varying lengths around the perimeter. Note bolt locations and lengths for proper reinstallation. Check for any hidden bolts near starter opening or under dust cover areas.
6. 6

   Separate transmission from engine
   Ensure transmission jack is securely positioned and balanced. Carefully pull transmission straight back away from engine, ensuring input shaft clears clutch assembly without binding. Keep transmission level during removal to prevent input shaft from damaging clutch disc. Once input shaft is clear, lower transmission jack and remove transmission from under vehicle.
   ⚠️Transmission is extremely heavy. Ensure jack is rated for weight and properly balanced before moving.
7. 7

   Access and inspect clutch assembly
   With transmission removed, inspect clutch pressure plate, clutch disc, and flywheel surface for wear, hot spots, or damage. Use clutch pressure plate holding tool or insert bolts around perimeter to hold pressure plate during removal. Remove pressure plate mounting bolts in a cross-pattern, loosening gradually to release spring tension evenly.
8. 8

   Remove old throw-out bearing
   Locate throw-out bearing on the front of the removed transmission input shaft or on the clutch fork/slave cylinder actuator. If bearing is retained by clips or snap rings, remove retaining hardware. Slide throw-out bearing off input shaft bearing retainer. Inspect input shaft seal, clutch fork, and pivot points for wear or damage.
9. 9

   Install new throw-out bearing and components
   Clean input shaft bearing retainer thoroughly with solvent and dry completely. Lubricate new throw-out bearing inner surface lightly with high-temperature bearing grease (do not over-lubricate). Slide new throw-out bearing onto input shaft retainer, ensuring it moves smoothly and seats properly. Install any retaining clips or snap rings. If replacing clutch slave cylinder or fork, install and verify smooth operation.
10. 10

    Reinstall clutch assembly
    Clean flywheel surface with brake cleaner and lint-free cloth. Install clutch disc onto flywheel with proper orientation (marked side typically faces pressure plate). Insert clutch alignment tool through clutch disc into pilot bearing. Position pressure plate over clutch disc and thread mounting bolts finger-tight. Torque pressure plate bolts gradually in cross-pattern to manufacturer specification. Remove alignment tool and verify clutch disc centers freely.
    ℹ️Clutch disc must be installed with correct orientation or clutch will not release properly.
11. 11

    Reinstall transmission to engine
    Apply thin film of high-temperature grease to transmission input shaft splines. Position transmission on transmission jack and raise into position. Align transmission input shaft with clutch disc center (should slide in easily if clutch is properly aligned). Push transmission forward until bell housing contacts engine block. Install all bell housing bolts and torque to specification in cross-pattern.
12. 12

    Reinstall transfer case and complete reassembly
    Install new gasket on transfer case mating surface. Raise transfer case into position and align with transmission output. Install transfer case mounting bolts and torque to specification. Reconnect all electrical connectors, shift linkage, and clutch hydraulic line. Bleed clutch hydraulic system per manufacturer procedure. Install starter motor. Install transmission crossmember and mounts, torquing to specification. Reconnect driveshafts aligning reference marks made during disassembly.

Reassembly

1. Refill transmission with ZF Lifeguard 8 fluid to proper level using fill plug (approximately 10 quarts)
2. Reinstall exhaust system with new gaskets if needed
3. Install transmission skid plates and engine undertray
4. Reconnect negative battery terminal
5. Lower vehicle and perform final torque verification on all critical fasteners

Verification

• Start engine and verify no unusual noises from transmission or clutch area
• Depress clutch pedal multiple times and verify smooth operation with proper resistance
• Test clutch engagement by attempting to start vehicle in gear with clutch depressed (should not lurch forward)
• Road test vehicle through all gears verifying smooth shifting and proper clutch release
• Check for fluid leaks around transmission, transfer case, and clutch hydraulic connections
• Verify no rattling or bearing noise when clutch pedal is depressed or released
• Confirm proper clutch pedal feel and engagement point is within normal range

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