Leaking axle seal, vibration on acceleration, hesitation and revving at times??

What is your question?

My brand new car has done this since 6 months after purchase, dealer claims they can't duplicate, but the axle seal has been replaced twice now in 2 years, it only has 36000 miles and has been back 10 times, I believe since we also notice but was also dismissed and "not seen by mechanic" see a drop of transmission fluid on seam of the case that the transmission has been leaking from case and axle seal. I believe the transmission has suffered some damage but don't know if because it is intermittent but fairly regular under everyday driving conditions if this is a sign of bigger transmission problems?

What makes this problem better or worse?

Hard to say, turbo issue is noticed when I am at highway speeds needing pull out to pass but not pushing hard on gas will see rpms rev and turbo doesn't kick in

How long has your 2018 GMC Terrain had this problem?

years now - brought to dealer 10 times for same issues