2006 Chevrolet Avalanche 1500 Transmission and drivetrain Problems

“Takata recall transmission suddenly stopped. Only drives in first gear, has 70,000 miles, has been maintained. While driving on 128 south in danvers, ma at 4:30 the truck became sluggish, grew worse with in seconds causing my top acceleration to decrease to 20 MPH at best, was able to get off after a mile and speed decreased to 10 MPH. I lost all gears aside from first. I have inquired with a few mechanics getting mixed answers ranging from total rebuild to solenoids. Truck is dead with 70,000 miles.”

“I backed out of my driveway stopped my truck like always put it in d to drive heard a loud clunk noise and now I have 1 and 2 gear only to use the truck was stationary was on a main road I changed the transmission fluid screens filters everything flushed it out and still the same thing a lot of people are saying it's the sprag unit I have no idea what that is I have only hauled a few things with it when we were moving we only moved eight miles down the road used a trailer and the tow gear that is on the truck. …”

“Driving home last night, I lost 3rd and 4th gears in my transmission under normal acceleration. I have an '06 Chevrolet avalanche z71 with less than 89,600 miles on it. I have never towed anything except for a uhaul trailer once for about 250 miles. I was on the highway when this happened, traveling 50-55 MPH when it occurred. I was able to coast to a stop on the shoulder of the highway without further incident, however I was almost rearended by following traffic the moment it happened because of the sudden decrease of speed without warning. The transmission gave no warning before it broke. …”

“Driving down the road the truck engine will be running with no abnormal sounds, smells, leaks but will act as if not in gear. Rpm's will rev but truck will not move. Only after putting truck in park (lots of grinding noises) then pressing the 4wheel button then back to 2wheel (sometimes through two cycles) the truck will back into gear and operate properly. Took it to a transmission shop put it on the diagnostic machine and no error codes were given to give reason why the transfer case disengages randomly. …”

“Transmission slipping. When traveling at shift point 1-2, 2-3 the engine rpms suddenly increase then return to nominal speed. The mileage is way to low for this behavoir. I believe GM should issue (or pay for) the parts (the toughened or improved parts) to correct this problem or re-reimburse the current owner for the retail cost of the GM (improved) parts if the owner chooses to have the work done else where. The shifting action is not firm, it's sloppy. At times you can't feel the shift in the conventional way but you can hear it.”