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Service everything that can be serviced. Use OE or OEM. Do not go eBay or Ali express on this. Leaks can only be tested by a smoke machine. Visual inspections for intake leaks are useless. There should be two MAP sensors In your vehicle. One is close to the filter and another much closer to the manifold.
Your issue looks more on the engine side than the transmission. If you can replicate the problem with specific driving behavior, test the transmission by placing it on Neutral the next time you want to invoke the problem. If it still does it, it is likely your engine's ignition.
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