Download 2000 CHEVY / CHEVROLET CK Pickup Truck Owners Manual –

Replacing the transmission pump in a Chevy Chevrolet CK Pickup Truck can be a challenging task, but with some patience and the right tools, you can do it. Here’s a step-by-step guide to help you understand the process, even if you are a complete beginner.

### Tools and Materials You Will Need:

1. **Basic Tools:**
– Socket set (metric and standard)
– Wrenches (metric and standard)
– Screwdrivers (flathead and Phillips)
– Pliers
– Hammer
– Torque wrench
– Oil filter wrench (if applicable)

2. **Specialized Tools (if necessary):**
– Transmission Jack (for safety)
– Seal puller (for removing seals)

3. **Materials:**
– Replacement transmission pump
– New seals and gaskets (often come with the pump)
– Transmission fluid (make sure it’s the right type for your truck)
– Clean rags or shop towels
– Drain pan (for catching old fluid)

### Step-by-Step Process:

#### 1. **Safety First:**
– **Parking:** Park your truck on a flat surface and engage the parking brake.
– **Disconnect the Battery:** Open the hood, and use a wrench to disconnect the negative terminal (black) of the battery to avoid any electrical issues.

#### 2. **Lift the Truck:**
– **Jack Up the Truck:** Use a floor Jack to lift the front of the truck. Make sure to place Jack stands under the frame for safety.
– **Check Clearance:** Ensure that you have enough room to work underneath the truck.

#### 3. **Drain the Transmission Fluid:**
– **Locate the Drain Plug:** Underneath the transmission, find the drain plug.
– **Position the Drain Pan:** Place your drain pan under the transmission to catch the old fluid.
– **Remove the Plug:** Use a socket wrench to remove the drain plug and let the fluid drain completely.

#### 4. **Remove the Transmission:**
– **Disconnect Components:** Before you can access the pump, you need to remove the transmission.
– Disconnect the driveshaft (usually involves unbolting it from the rear axle and transmission).
– Remove any electrical connectors or linkage attached to the transmission.
– Remove transmission cooler lines (be prepared for some fluid spill).
– **Unbolt the Transmission:** Use a socket wrench to remove the bolts holding the transmission to the engine.
– **Lower the Transmission:** Using a transmission Jack (or a regular floor Jack if you’re careful), lower the transmission from the truck.

#### 5. **Access the Transmission Pump:**
– **Remove the Transmission Pan:** Once the transmission is out, flip it upside down and remove the transmission pan by unscrewing the bolts. Be prepared for some remaining fluid to spill.
– **Remove the Valve Body:** You may need to remove the valve body (the large assembly inside the transmission) to access the pump. This typically involves removing several bolts and disconnecting some electrical connectors. Keep track of where everything goes.
– **Remove the Pump:** The pump will be bolted to the transmission case. Unscrew the bolts and carefully pull the pump out. There may be a seal that you will also need to replace.

#### 6. **Install the New Pump:**
– **Clean the Area:** Before installing the new pump, clean the area around the pump and the transmission case to ensure a good seal.
– **Install New Seals:** Place new seals in the appropriate areas where the pump will attach to the transmission.
– **Insert the New Pump:** Carefully align the new pump with the mounting holes and secure it with the bolts. Be sure to follow any torque specifications in your service manual to avoid over-tightening.

#### 7. **Reassemble the Transmission:**
– **Reinstall the Valve Body:** If you removed the valve body, carefully put it back in place download CHEVY CHEVROLET CK Pickup Truck workshop manual and secure it with the bolts.
– **Reattach the Transmission Pan:** Replace the gasket (if necessary) and reinstall the transmission pan, tightening the bolts evenly.

#### 8. **Reinstall the Transmission:**
– **Lift the Transmission Back:** Use the transmission Jack to lift the transmission back into place.
– **Bolt it Up:** Reattach the transmission to the engine using the bolts you previously removed.
– **Reconnect Everything:** Reconnect the driveshaft, cooler lines, electrical connectors, and any other components you removed.

#### 9. **Refill Transmission Fluid:**
– **Check for Leaks:** Before adding new fluid, check for any leaks around the pump and pan.
– **Add New Fluid:** Using a funnel, pour the appropriate type of transmission fluid into the dipstick tube. Check your owner’s manual for the correct fluid type.
– **Check the Level:** Start the engine and let it idle. Shift through all the gears with the brake on, and check the fluid level using the dipstick. Add more fluid if necessary.

#### 10. **Reconnect the Battery:**
– Reattach the negative battery terminal and ensure it’s secure.

#### 11. **Test Drive:**
– Take your truck for a test drive to ensure everything is working correctly. Pay attention to how the transmission shifts and listen for any unusual noises.

### Final Tips:
– **Take Your Time:** Don’t rush through the process. Double-check your work at each step.
– **Consult a Manual:** If you have access to a service manual for your specific model, it can provide valuable diagrams and specifications.
– **Ask for Help:** If you feel unsure about any step, don’t hesitate to ask a more experienced mechanic for assistance.

Following these steps should help you successfully replace the transmission pump in your Chevy Chevrolet CK Pickup Truck. Good luck!
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