Tools and Materials Needed:
- Replacement Flexplate
- Transmission jack or support stand
- Jack
- Jack stands
- Socket set
- Ratchet
- Flexplate bolts
- Fluid drain pan
- New transmission fluid
- Funnel
Safety Precautions:
- Park your Jeep Cherokee on a level surface.
- Engage the parking brake and chock the wheels to prevent the vehicle from rolling.
- Disconnect the negative terminal of your Jeep Cherokee's battery. Wear gloves and safety glasses.
- Allow the engine to cool down completely before beginning any work.
Step-by-Step Instructions:
1. Remove Transmission Bolts
- Remove the transmission bolts that secure it to the engine. Disconnect any shift linkage (if applicable).
2. Raise the Transmission
- Place a transmission jack or a support stand under the transmission to support its weight.
- Use a pry bar or a long screwdriver to separate the transmission from the engine.
3. Remove Flexplate Bolts
- Locate the flexplate bolts that connect it to the engine block.
- Remove the bolts using the appropriate socket and ratchet.
4. Remove the Flexplate
- Carefully remove the old flexplate from the crankshaft. Note the position and orientation of the flexplate, as you will need to install the new one correctly.
5. Clean the Crankshaft
- Clean the crankshaft mating surface with a degreaser or brake cleaner to remove any dirt, grime, or old gasket material.
6. Install the New Flexplate
- Position the new flexplate onto the crankshaft, aligning it correctly. Install the flexplate bolts and tighten them securely.
- Hand-tighten the flexplate bolts first, then use a torque wrench to tighten them to the manufacturer's specified torque.
7. Lower the Transmission
- Carefully lower the transmission onto the engine. Verify that the input shaft of the transmission mates with the clutch disc or torque converter.
8. Secure the Transmission
- Replace the transmission bolts and tighten them securely. Reattach any shift linkage that you may have disconnected.
9. Add Transmission Fluid
- Remove the fill plug from the transmission and use a funnel to add new transmission fluid. Consult the vehicle's owner's manual or a reliable source for the correct type and quantity of fluid.
10. Test the Transmission
- Reconnect the negative battery terminal and start the Jeep Cherokee. Test the transmission by shifting gears and verifying proper operation.
11. Check Fluid Level
- With the engine running, check the transmission fluid level using the dipstick or sight glass. Add additional fluid if necessary to bring it to the recommended level.
Note: If your flexplate failure was caused by a faulty starter motor, make sure to replace the starter as well.
Tips:
- If you can't easily access the flexplate, you may need to remove other parts such as the exhaust system or skid plates.
- When aligning the new flexplate, ensure it is properly centered and fits snugly against the crankshaft.
- Tighten the flexplate bolts in a star pattern to ensure even distribution of force.
- If the transmission fluid is contaminated with debris or metal shavings, it's advisable to flush the transmission and replace the filter.
Replacing a flexplate can be challenging but is feasible with proper preparation and attention to detail. If you're inexperienced or unsure about any steps, it's best to consult with a trusted mechanic or a professional.
