I had the transmission light come on like 4 days ago. Well the dealership did a diagnostic for $175 and they said they checked everything as far as the converter and something else i forgot, but that wasnt the problem so they called me back asking to further do checks on it, and they said can they check the valve body i said yes. so they found out that was the problem. so the valve body part, diagnostic, fluid came up to $1120 does that sound reasonable? and wondering would that fix the transmission error for sure?