My MDX started downshifting to 1st while driving.Usually between 3 & 4th. on 2002 Acura MDX

It only lasts a second then kicks back into 3rd or 4th for a while. I really feel it(like the brakes getting slammed on).It happened about 6 times on my 10 mile drive usually around 35MPH.Any Ideas? Tranny oil level looked ok. Slightly brown. I drained and refilled about 4 years ago. Any ideas? Thanks in advance!

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2 answers
These vehicles have some transmission pressure solenoid issues. It could be one of them acting up, or it could be the trans fluid. Have the TCM scanned for codes.
Call dealer for possible recall or TSB involving the VSA system activating brakes unexpectedly , maybe something similar to the honda pilot. Worth a check, might be a free repair!