No, the point of shift lock is to break traction. When you jam it from 3 to 2, you get that little jolt in your driveline, this actually is your rear end "locking up", and at that point you have lost traction for a fraction of a second, during that fraction of a second, if you floor it, almost any amount of horsepower will just spin the tires because you have already lost traction.
When you shift down without rev matching, your engine is going to shoot up in rpms to match the speed of the wheels, but it needs a little amount of time to do that, and while the engine is matching the speed of the wheels, your wheels lose traction.
When you shift down without rev matching, your engine is going to shoot up in rpms to match the speed of the wheels, but it needs a little amount of time to do that, and while the engine is matching the speed of the wheels, your wheels lose traction.
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