Assuming it's a 3.0L or 3.8L, here's what could be causing the leak:
* Transmission Pan Gasket: This is the most common cause. Over time, the gasket can harden, crack, or become brittle, leading to leakage. This is a relatively inexpensive and straightforward repair.
* Transmission Cooler Lines: These lines carry transmission fluid to and from the radiator for cooling. Leaks can occur due to corrosion, cracks, or loose connections. These are easier to spot as they're often visible near the radiator.
* Transmission Seal(s): Various seals within the transmission itself can wear out and leak. This is a more complex and expensive repair, often requiring transmission removal. Common culprits include input shaft seals, output shaft seals, and various internal seals.
* Transmission Case Crack: Less common but possible, especially if the transmission has been subjected to impact or significant wear. This is a major repair, potentially requiring a transmission replacement.
Troubleshooting Steps:
1. Locate the Leak: Carefully inspect the entire transmission area, including the pan, cooler lines, and surrounding areas. Look for fresh, reddish-brown fluid. A clean rag or cardboard placed under the van overnight can help identify the source.
2. Check Fluid Level: Check the transmission fluid level with the engine running and warmed up (consult your owner's manual for the correct procedure). Low fluid level strongly indicates a leak.
3. Identify the Type of Fluid: Transmission fluid is specific. Knowing the type (Dexron III, for example) is helpful for the repair.
4. Professional Inspection: Due to the complexity of transmission systems, it's highly recommended to take your Caravan to a qualified mechanic for diagnosis. They can accurately pinpoint the source of the leak and provide an accurate repair estimate. Ignoring a transmission leak can lead to serious and expensive transmission damage.
Important Note: Driving with a low transmission fluid level can severely damage the transmission, leading to costly repairs or even replacement. Have this addressed immediately. The incorrect engine size mentioned makes it even more critical to get a professional inspection.
