jyoung84

Sounds like the speed sensor does not fix all of everyone's problems. Here is what happened with mine. Had the same shift problems. Would not shift out of first when cold. For a while it worked after the car warmed up. Then it even started having problems when warm. I had bought the car used so I changed the tranny fluid and filter. No help. Started getting check engine and OD off lights. Usually said something like Too Lean Bank 1. I did however have one OBD2 code that read out a Knock Sensor. I would not have dreamed that a knock sensor could cause shift problems with the tranny. Especially when the car seemed to be running smoothly (no pinging.) Nothing else seemed to work for me so I changed out both knock sensors. Not a quick job since you have to pull of the intake manifold to get at them. I have been driving the car for at least six months since changing them and it has never missed a shift. Knock sensors cost about $130 each (x2) from O'Reillys plus intake manifold gaskets etc. but it was worth it. Also, I recommend that you replace the knock sensor wiring harness (dealer only item) while you have it torn appart. There is also a cooling system hose undereath the intake manifold that you should get from the dealer to replace while your at it. My guess is that if a knock sensor is sending a false signal to the computer that the engine is pinging then it will not allow the transmission to shift until the pinging stops. Not sure but my works like a champ now. Oh by the way mine is a 1999 ES300.