Differential service on a Chrysler LH platform vehicle, such as the New Yorker, Concorde, Intrepid, Vision, or LHS, involves maintaining and, if necessary, replacing the differential fluid and components to ensure optimal performance and longevity. click here for more details on the download manual…..
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Below is a detailed description of the components involved and the steps to service the differential.
### Components of the Differential System
1. **Differential Housing**:
– The main casing that holds the differential gears and fluid. It is typically made of cast iron or aluminum and is mounted to the rear axle (in rear-wheel-drive models) or integrated into the transaxle (in front-wheel-drive models).
2. **Ring Gear**:
– A large gear attached to the differential housing that is driven by the pinion gear from the driveshaft. It is responsible for transferring power from the driveshaft to the wheels.
3. **Pinion Gear**:
– A smaller gear that meshes with the ring gear and is driven by the driveshaft. It is crucial for converting rotational motion from the driveshaft into the differential.
4. **Spider Gears**:
– Small gears within the differential that allow for the separation of wheel speed between the left and right wheels, enabling smooth turns.
5. **Side Gears**:
– These are connected to the axle shafts and interact with the spider gears to transfer torque to the wheels.
6. **Differential Fluid**:
– A specialized lubricant that reduces friction and heat within the differential. It is important to use the manufacturer-recommended type and viscosity.
7. **Differential cover (if applicable)**:
– A removable cover on the differential housing that allows access to the internal components for servicing.
8. **Seals and Gaskets**:
– These prevent fluid leaks and keep contaminants out of the differential housing.
### Tools and supplies Needed
– **Tools**:
– Socket set and ratchet
– Torque wrench
– Screwdrivers (flathead and Phillips)
– Pliers
– Fluid pump or funnel
– Drain pan
– Cleaning supplies (rags, solvent)
– **Supplies**:
– Differential fluid (check owner’s manual for specifications)
– New differential cover gasket or RTV sealant (if applicable)
– Replacement seals (if necessary)
### Steps to Service the Differential
1. **Preparation**:
– Park the vehicle on a level surface and ensure the engine is off and cool.
– Raise the vehicle using jack stands if necessary, ensuring it’s safe and secure.
2. **Drain Differential Fluid**:
– place a drain pan under the differential.
– Locate the drain plug (if equipped). If not, remove the differential cover to drain the fluid.
– Remove the drain plug using the appropriate socket. Allow the fluid to fully drain into the pan.
3. **Inspect Differential Components**:
– If you removed the differential cover, inspect the internal components for wear or damage. Look for metal shavings, which could indicate wear.
– Check the condition of the spider gears and side gears.
– Replace any worn components as necessary.
4. **Clean the Differential Housing**:
– Clean the mating surfaces of the differential housing and cover with a solvent and a clean rag to remove old gasket material and debris.
5. **Install New Seals
and Gasket**:
– If you replaced the differential cover, install a new gasket or apply a bead of RTV sealant around the mating surface of the cover.
– Ensure the seals for the axle shafts are in good condition. Replace them if they are worn or leaking.
6. **Replace Differential Fluid**:
– Reinstall the drain plug (if applicable) and torque it to the manufacturer’s specifications.
– Use a fluid pump or funnel to fill the differential with the appropriate amount and type of differential fluid through the fill hole (if applicable) or through the cover before sealing it.
7. **Reinstall Differential Cover**:
– If you removed the cover, reinstall it and torque the bolts to the manufacturer’s specifications in a crisscross pattern to ensure even distribution of pressure.
8. **Check for Leaks**:
– Start the vehicle and let it run for a few minutes, then check for any leaks around the differential cover and seals.
9. **Final Check**:
– lower the vehicle if it was raised and take it for a short test drive to ensure everything is functioning correctly.
### Conclusion
Performing differential service on Chrysler LH platform vehicles is crucial for maintaining the vehicle’s performance and longevity. Regular checks and timely fluid changes can prevent costly repairs and ensure a smooth-driving experience. Always refer to the vehicle’s service manual for specific instructions and torque specifications related to your particular model.
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