This is the locking mechanism that prevents you from shifting from park without depressing the brake pedal or pressing the release button to the right of the gear shifter. This is the locking mechanism that prevents you from shifting from park without depressing the brake pedal or pressing the release button to the right of the gear shifter.
The transmission in the Trailblazer could be low on fluid. The internal shifting mechanism could be giving problems as well, keeping the transmission from shifting into gear.
If it is like most Chrysler Autos, you need to put your foot on the brake pedal before shifting into gear.
Make sure you are shifting it at very low idle speed. Outboards have a built in mechanism to keep owners from shifting at too high rpm and damaging the drive train.
The first cause of the jump out from one to other gear is the loose shifter fork, which connects the shifting linkage and gears of the transmission. The second cause is loose shifting linkage itself, which connects the gear shifting knob and shifting fork. The shifting linkage and shifting fork become loose due to the rapid changing of gears from one gear to other at high speed of vehicle. The third cause is the misalignment of shifting linkage to the shifting fork.
In any vehicle which has a clutch ( instead of an automatic transmission), depressing the clutch, released the power train from the gear box, letting you shift gears without the power transfer mechanism ( whatever this is on a motorcycle or what not) supplying power. When you release the clutch the power mechanism is re-established with the new gear ratio in operation.
I would suspect a neutral safety switch. This is a mechanism that prevents your car from being put into gear without your foot pressing down on the brake pedal. With the car running put your foot on the brake first, then try shifting into gear. It has to be done in that order or it wont go out of park. If you listen closely when you press on the brake "while in park" you may even be able to hear the single "click" sound in your shifter of the switch doing its work....if it's working. If you don't hear a click or feel a click in you shifting hand when you do this I would start there.
Companies such as o'neal, fox, and alpine stars make boots specialized for gear shifting. The steel tips on the front of these boots are made to shift up by putting your foot under the shifting lever and kicking up.
Your sun shell is broke
The car isn't necessarily shifting into neutral its just staying in a lower gear and not shifting to the next gear, check your transmission fluid.
If your transmission is not shifting into third gear and overdrive it could be a parking pawl. This prevents the transmission from rotating.
When shifting a manual (or standard) transmission on a vehicle, if you hear excessive knocking noises immediately after shifting, you are probably:1) Shifting into the next highest gear too soon, or2) Shifting into the wrong gear - for example, going from 2nd to 4th gear, or3) Not running the engine fast enough after shifting to the next highest gear, or4) Your engine is out of tune if you know you're doing steps 1,2 and 3 correctly