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Cruise Control - now working perfectly

885 Views 3 Replies 4 Participants Last post by  Big_Al1
One of my biggest gripes with my 2004 and 2006 Tundras (both 4.7L's) was the cruise control.

With the very slightest elevation change, headwind, .1 MPH drop in speed, toads' fart, etc it would downshift and redline for a long time, before finally dropping back to cruising. This made it very difficult to use without getting angry at it.

So, I got an '07, also with the 4.7L and the 5spd Auto.

I tried the cruise this weekend, on a particularly hilly section of road that was so hilly, I wouldn't even have dared to use the cruise on the '06. I was pleasantly surprised that it gently downshifted 1 gear, brought the RPM's up to 2900 or so, held it smoothly, then dropped back down, right in the meat of the torque through the hilly section. Like butta'....

I totally don't understand what was up with my '06 cruise. My buddy has an '06 4.7 and his cruise works fine.
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Weight and torque will also be two factors. You have a single cab 07 now but did you have them in 04 and 06 as well?
My understanding is that overdrive forces the vehicle into the highest gear when in excess of 45 mph so that the vehicle has a lower RPM which saves on fuel and engine wear.

While driving with Cruise Control and O/D, a steep enough incline would cause the vehicle to slip out of O/D and in order to get back, the engine would rev high.

Simple solution is to turn O/D off when in hilly / mountainous terrain. Works for me... :tu:
My 05 does like you say your 07 is doing it never redline lines unles I put the skinny pedal to the floor.
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