6L80 1/5 intro

[@elchivasregal5950]

Thanks Sr. Very educational video I have a question 6 months ago a bought a 2017 gmc sierra 1500 5.3L and since I bought it I have noticed i can't explain it but in gear 2 to 3 it takes a while to engage in 1 to 2 the gears go in fast 2 to 3 I always see the engine rev like the gear is slipping and 3 to 4 normal 5 to 6 normal, in down shifts the same normal only when I go slow and it gets to 3 to 2 normal but when I accelerate again to 2 to 3 a fell that it takes awhile to shift and it revs I took the truck to the dealership and they said that the trans is normal no codes they took it to a test drive and the same no problem that the trans is in good shape they told me that maybe I am not use to driving 6 speeds what can you think is happening is it normal or not normal. Another thing I changed the trans oil this past weekend myself i told the dealer to change it and they said that it was in good shape to but I changed anyway your input will be appreciated thanks