No, the solenoid connectors may have different colors, but they are the same shape and are interchangeable functionally. The black connector was the original one. The white connector denotes the "NVH" solenoid module, which was introduced in 2004 MY Jeeps and went across the board in 2005 MY. That solenoid module contains individual solenoids that are designed to be quieter than the original design (no more "solenoid buzz" when coming to a stop or shifting into gear from Park/Neutral). That solenoid module can be used in place of the earlier one; the electrical pinout and connector configuration are the same.If his '03 solenoid pack has a black connector (early built '03) and the '05 has the white connector, isn't an adapter required to lock the connector down. I know using an '03 and down transmission needs this to work in a newer truck, but I'm not sure the other way around.