Transmission replacements are always expensive repairs due to the cost of parts and intensity of labor. A 2002 Honda Civic transmission replacement costs between $4750 and $5250.
This high price is mostly due to the cost of parts. A new transmission is a complex piece of machinery and will likely cost anywhere from $4000 to $4500. On top of that, labor is also time-consuming and will likely to cost around $750, although this will fluctuate based on where you live.
If these prices seem too steep for a twenty-year-old car, then it might be time to say goodbye to your Civic.