Answers: If you are getting a intermittent irregular shifting, usually under some nouns, perhaps pulling uphill or accelerate, then you may be experiencing torque converter shudder. It might consistency like the engine is missing or the vehicle have a vibration.
If to be precise the case the fix may be a complete ATF fluid exchange, beside the use of a transmission flush contraption. Of course using the right fluid. Performing a pan drop type fluid, will not relocate enough fluid for this to work.
Another potential way out is the use of a product like Wynn's ShudderGuard Transmission Treatment or TransFormer Transmission Treatment. They be paid another transmission treatment, but unless it say ShudderGuard or TransFormer it probably will not help this problem.
There are other potential cause for this type of erratic behavior, such as internal valve solenoids, computer, etc.
Thats nice to know. But I don`t see any cross-question or info as to the type and age of the vehicle.
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