77magnum13hundy Posted July 8, 2012 Share Posted July 8, 2012 Hey my daily's got this lil thing where you drive along and the overdrive dont kick in till 3 mins down the road. I drive a 94 toyota curren and just wondering how they work? Do they run off a built up of pressure or is it connected to the speed sensor/rpms/ecu to activate a solinoid or summit? Car usually does 2200 rpm at 100 km with overdrive and when it dont work it feels like im ringing it out at 3500 same speed. If there was a simple fix that'd be sweet, i think the boxes are bout 80 bux at pickys but not feeling like swapping a box out just for that... Cheers Quote Link to comment Share on other sites More sharing options...
fuel Posted July 8, 2012 Share Posted July 8, 2012 that's completely normal for a Toyota auto of that age. They wont hook into overdrive until it's warmed to optimum operating temperature. It's controlled by a water temp sensor in the cooling system which is connected to the transmission ECU. You could try fitting a genuine toyota thermostat, I find the aftermarket ones don't close properly and still let coolant get through therefore taking a longer time to warm up. Quote Link to comment Share on other sites More sharing options...
77magnum13hundy Posted July 8, 2012 Author Share Posted July 8, 2012 far out so swapping the box wouldnt have done squat then. Cheers. The man. Makes sense cos the thing is fine when its warm. Quote Link to comment Share on other sites More sharing options...
77magnum13hundy Posted August 5, 2012 Author Share Posted August 5, 2012 BUMP Also I did the head gasket on this thing in the weekend, went to time it when it was in diagnostics mode and got 2 short flashes and a long flash / 21? When i clicked my O/D button on it started to flash... googling topic strength isnt very good... ST206 3s-fe Does any one know what this fault would be? Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted August 7, 2012 Share Posted August 7, 2012 do you mean the engine cheack like was flashing or the over drive light? Quote Link to comment Share on other sites More sharing options...
77magnum13hundy Posted August 8, 2012 Author Share Posted August 8, 2012 both , but the o/d light only when clicked on... seems to run ok, just curious as to why it would do that Quote Link to comment Share on other sites More sharing options...
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