Cruise Control problems of the 2005 Toyota Tundra

On February 2, 2010 at about 6:20am while driving my Toyota Tundra 2005 ,v8 engine,on highway 101 west bound when my vehicle suddenly accelerated on me. I was on lane one between barham Ave. & vineland Ave when it all happen, making me change lanes at an unsafe speed trying it to control it. I had my foot off the accelerator but it keep going at about 75-80 mph. There was no cruise control on and I was shocked about the sudden acceleration. The vehicle finally came to normal driving conditions at about 1/4 of a mile from vineland Ave.

Driving at highway speed, with cruise control engaged, and beginning to climb a gentle hill, engine suddenly accelerates at full throttle, and the transmission downshifts two gears. It causes the vehicle to suddenly and rapidly accelerate. Vehicle is very difficult to control on snowy, or rain slick roadways. If following another vehicle that slows on hill, such as a semi tractor-trailer, there is eminent danger of a rear-end collision. This is not an isolated incident, it occurs every time three conditions are met: 1. Cruise control is engaged. 2. Vehicle drives up incline or hill. 3. Highway speed.

Cruise control down shifts two gears on slight upgrades. Even elevation changes of less than fifty feet on the highway can trigger this. The sudden unintended application of full throttle acceleration is alarming and dangerous. This surge or power always result in the cruise control surging past the set speed usually by five miles per hour. Depending on terrain this can happen as often as every twenty seconds!.

2005 Toyota v8 Tundra. Bought new in 2005. When going up hill/incline with cruise control engaged, vehicle dangerously accelerates causing the tires to loose traction on wet or loose surfaces. I noticed this problem shortly after I purchased it. I no longer use the cruise control feature on my Tundra. I previously owned a 2000 Tundra and the same thing occurred with the cruise control on that vehicle. Seems to be a major/dangerous problem with the Tundra.

We own "two" 2005 Toyota Tundra double cabs that are equipped the same. Both of these vehicles exhibit the same saftey issue. The issue: when driving with cruise control "on" at speeds of 70 mph, on slightly uphill track, the cruise control will command the vehicle to maximum throttle, shifing the transmission into passing gear. This action on the 287 horsepower vehicle, causes the rear tires to break loose on wet roads and can cause loss of control of the vehicle, sending it off the road or into a spin. Both vehicles we own exhibit this behavior and it has been reported to Toyota case # 200510040775.