Transfer Case Shift Control Module

The transfer case shift module gives you the ability to use your vehicle's two-wheel or four-wheel drive with just the flick of a few buttons. It's a useful technology that lets you harness the full potential of your vehicle. However, a transfer case shift module will eventually reach the end of its service life, leaving you with no choice but to get a replacement. Buying a new module is pricey enough as it is. It's a good thing that you can lower your expenses by replacing it yourself. Here's what you should do to get this task done properly:

Difficulty level: Moderate

What you'll need:

• Jack
• Jack stands
• Wrench
• Ratchet and socket set
• Owner's manual
• Drain pan
• Replacement transfer case shift module

Step 1: Pop up your vehicle's bonnet and locate its battery. You have to disconnect the negative cable from it to avoid getting electrocuted while you're working on your car. It's also recommended that you wrap a clean cloth around the tip of the cable to keep it from touching any metal surface.

Step 2: Using a floor jack, raise your vehicle up to get a better access to its transmission system. Place the jack stands under the vehicle for support. Before doing this, you have to make sure that you're on a level surface to keep the vehicle from going out of balance.

Step 3: Take a look at your car's underside and try to find the location of the transfer case shift module. This is usually around the rear end of the vehicle. If you can't locate it, try consulting your owner's manual to see where it's exactly mounted.

Step 4: Place the drain pan right under the transfer case shift module and remove the drain plug. Allow the transfer case oil to drain into the pan.

Step 5: Disconnect the wirings that are attached to the transfer case shift module. Make sure that you don't put too much force when pulling them off one by one. You should also remove the shift linkage as well as the rear and front shaft that are attached to the module.

Step 6: After you've gotten all the attached components out of the way, you should now be able to remove the transfer case shift module from the transmission system of the vehicle. Start by taking off the bolts that are securing it in place. Using your wrench, remove them one at a time and place them on a clean area where they won't get lost.

Step 7: Carefully slide the old transfer case shift module away from its mounting location and set it aside.

Step 8: Install the new transfer case shift module. Bolt it to transmission system of your vehicle and plug back all the electrical wirings that you removed earlier. Don't forget to put the shift linkage and front and rear shafts back into their proper places.

Step 9: Lower you vehicle and test if the new transfer case shift module is working properly.

Replacing a damaged transfer case shift module may take a skilled DIYer around one hour to finish.