Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › P0470 code on 1996 Geo Tracker › Reply To: P0470 code on 1996 Geo Tracker November 21, 2020 at 2:54 pm #987150 Rob SiergfriedParticipant I did find some info. This is a chevy 3 speed trans and it may need a TCC solenoid and / or a TCC relay. Can’t find the relay. The TCC solenoid in on the underside of the trans and visible when the pan comes off.