The speed sensor for the 2004 tundra is situated in the back of a longitudinal mount transmission. The transmission is one of the main pieces of the vehicle. You will come into issues sooner or later. The pinion wheels might become stuck. If the transmission liquid releases,that should be fixed rapidly. There may jolt. Postponed movements will cause speed increase issues. Hard moves could come up and that isn't great. The transmission could slip. You might encounter shivers. The transmission liquid should be supplanted each 30，000 to 60，000 miles. Alongside liquid changes,horrible sounds will come from the transmission. Old transmission liquid will be dreadful to the ear. An exhausted force converter will cause a migraine.