So today after a long drive I parked my car in the driveway and left it idling; a short time later I noticed the temp starting to rise, (just a bit over half so no big deal) so I got in the car and watched it continue to climb. So I looked under the hood and noticed that the fan wasn't working. I pulled the fan out and ran a continuity test on it, nothing, dead. So I started looking online for a replacement, and all I can find are either direct OEM replacement $130 or one for the automatic trans $55? What's the difference? I would really hate to buy the OEM one and shell out three times as much as I have to if the one for the auto trans will work just as well.