Hey i have a '97 Z28 with A4 tranny...sometimes it shift into 2nd really hard and really jerks you. it just happened today when i decided to take it out on the highway and open her up. i had driven it around town for about 40 minutes and then got out to the highway and got up to around 90 then back down to 60 or so then stopped and then again up to 90, but heres what sucks...when i got back into town shifting into 2nd is really hard. after it sits and cools down it seems to shift as normal (which doesn't seem completely smooth in the first place). what is goin on, i've been told its the valve body but i switch the selenoid for the 1st and 2nd shifts and it still does it, should i replace the whole thing?