* Labor Costs: This is the biggest variable. Shop rates differ drastically by location (rural vs. urban, geographic region) and the specific shop's pricing structure. You could pay anywhere from $50-$200+ just for labor. Independent shops are generally cheaper than dealerships.
* Parts Costs: The seal itself is relatively inexpensive, likely costing between $10 and $30. However, you might need additional fluids (transmission fluid) which adds to the cost.
* Transmission Type: The Astro Van came with different transmissions (e.g., 700R4 automatic, others). The complexity of the repair varies slightly depending on the transmission type.
* Unexpected Repairs: Once the transmission is open, other issues might be discovered (worn bearings, damaged parts, etc.), significantly increasing the cost. This is a common occurrence with older vehicles.
In summary: You could get away with a total cost (parts and labor) as low as $100-$150 if it's a straightforward repair at an independent shop with reasonable labor rates, and no unexpected problems arise. However, be prepared to pay $300-$500 or more if you encounter complications, use a more expensive shop, or need additional repairs.
It's always best to get multiple quotes from different mechanics before proceeding with the repair. Consider getting a diagnosis first to determine the exact problem and rule out other possibilities.