Hi there, The speedometer in my car (98 Camry V6 Csi) is not working, and the check engine light is flashing. I just came back from the mechanic and he checked the speed sensor and speedometer - which was ok. He suspected that the gear in transmission for speedo sensor collapsed, and this will required transmission removal to repair. The quote was a whopping $1200! How many speed sensors are there altogether, and from my reading online, there is a sensor just sitting at the back of the transmission....but not inside? Does the mechanic's diagnosis make sense to you guys?