Genuine Volkswagen Golf Differential

Volkswagen Golf Differential Parts and Q&A

• Carrier
  0CQ-525-010-S
  Q: How to properly check and replace the fluid in a vehicle's transfer case, AWD coupler, and rear differential on Volkswagen Golf?

  A:

  Lift both the front and the back of the car so that it is even and firmly held on jackstands. When it is warm, (between 68 to 104 degrees F 20 to 40 degrees C) remove the check/fill plug out of the transfer case (bevel box) and ensure that the level of the fluid is at the bottom of the plug hole; otherwise, add the required amount of specified clutch fluid until you have reached the correct level then put the plug back in and tighten. Put a drain pan at the transfer case drain plug, cover the subframe to prevent the spillage of oil and take out the drain plug to drain the fluid fully then install the drain plug and tighten. Clean the space around the check/fill plug, take away it, fill up the transfer case with the relevant clutch oil into it using a hand pump until it drips at the hole and replace it and tighten the plug. In the case of the AWD coupler (Haldex), put a drain pan under it, take out the check/fill plug, and make the fluid level even at the bottom of the hole if not it is filled with the fluid it specifies. Once the vehicle is brought down and the fluid has warmed, repeat the test and drain as much of the fluid as possible prior to replacing the plug. To replace the fluid, unscrew the check/fill plug, put a drain pan under the drain plug and then have the fluid to drain before replacing the drain plug and filling the coupler with the fluid of the right amount until it flows out of the check/fill plug end. In the case of the rear differential, wear a drain pan underneath, take out the oil filler/check plug and make sure that the fluid is at the same level with the bottom of the hole otherwise fill it up with the required fluid. Having wiped the drain plug, remove the drain plug and drain the lubricant after which new lubricant is added up to the required level and the oil filler/check plug is reinstalled and tightened.