Reconditioning a gearbox, also known as a transmission, in a Jeep Cherokee XJ can be a complex task, but I’ll break it down into simple steps to help you understand the process. click here for more details on the download manual…..

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Before you begin, it’s important to have some basic tools and safety equipment like gloves, goggles, and a working area. Here’s a simplified guide:

### What You Need:

1. **Tools**:
– Socket set
– Wrenches
– Screwdrivers
– Torque wrench
– Pliers
– Drain pan
– Funnel

2. **Parts**:
– Transmission fluid
– Gasket or seal kit
– Replacement parts (if needed)
– Filters

3. **Safety Equipment**:
– Gloves
– Safety goggles

### Steps to Recondition the Gearbox:

#### step 1: Preparation

1. **Safety First**: Make sure the vehicle is parked on a flat surface, and engage the parking brake. Wear gloves and goggles for safety.
2. **Disconnect the Battery**: This prevents any electrical shorts or accidental starts.

#### step 2: Remove the Gearbox

1. **Lift the Jeep**: Use a jack to lift the front of the Jeep and secure it with jack stands.
2. **Drain Fluid**: Place a drain pan under the gearbox and remove the drain plug to let the old transmission fluid drain out completely.
3. **Disconnect Components**: Remove any components connected to the gearbox, such as the driveshaft and any electrical connections. Take note of where everything goes for reassembly.
4. **Unbolt the Gearbox**: Use your socket set to unbolt the gearbox from the engine and lower it down carefully. You may need help here, as gearboxes can be heavy.

#### step 3: Disassemble the Gearbox

1. **Clean the Surface**: Once the gearbox is out, clean the exterior to remove dirt and grime.
2. **Remove the case Bolts**: Carefully unbolt the gearbox case. Keep track of the bolts and their locations.
3. **Take Out Internal Parts**: Gently remove the internal components like gears, clutches, and any other parts. Watch how everything comes apart, as you will need to put it back together.

#### step 4: Inspect and Replace Parts

1. **Check for Wear**: Examine all parts for wear or damage. Look for cracks in the casing or worn-out gears.
2. **Replace Damaged Parts**: If you find any damaged parts, replace them. You can usually buy a rebuild kit for your specific gearbox that includes seals, gaskets, and any necessary parts.
3. **Clean Everything**: Use a solvent to clean all the parts thoroughly, ensuring there are no debris or old fluid left.

#### step 5: Reassemble the Gearbox

1. **Reinstall Internal Parts**: Carefully put the internal components back into the gearbox. Make sure everything aligns correctly.
2. **Seal and Bolt Up**: Use new gaskets and seals to prevent leaks, then bolt the gearbox case back together tightly.
3. **Torque Specifications**: Use a torque wrench to tighten bolts to the manufacturer’s specifications, which ensures everything is secure.

#### step 6: Reinstall the Gearbox

1. **Lift the Gearbox Back**: With help, lift the reconditioned gearbox back into place under the Jeep.
2. **Reconnect Components**: Reattach all the components you removed earlier, including the driveshaft and electrical connections.
3. **Fill with New Fluid**: Use a funnel to pour new transmission fluid into the gearbox. Check your owner’s manual for the correct type and amount of fluid.

#### step 7: Final Checks

1. **Reconnect the Battery**: Once everything is in place, reconnect the battery.
2. **Test Drive**: Start the vehicle and take it for a short test drive. Pay attention to how it shifts and listen for any unusual noises.

### Conclusion

Reconditioning a gearbox in a Jeep Cherokee XJ can be a rewarding project, but it requires patience and attention to detail. If you feel unsure at any point, it’s always a good idea to consult a professional mechanic or refer to a repair manual specific to your vehicle. Good luck, and happy wrenching!
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