As of 2015, the average cost of rebuilding a transmission generally ranges from $1,000 to $2,000 for a basic rebuild, according to Transmission Repair Cost Guide. More complex rebuilds may cost as much as a new transmission, ranging from $1,800 to $3,500.
The costs associated with rebuilding a transmission vary greatly, depending on the degree of damage and the make and model of the vehicle. Older automobiles often require parts that are more difficult to find, causing a higher expense. Automatic transmissions are generally more expensive to rebuild than manual transmissions. Having a transmission rebuilt by a skilled mechanic also adds to the overall costs, according to Transmission Repair Guide.