i need help...i took my blazer to the shop and had some work done on it to the engine but now that i got it back the transmission is changeing different it takes longer to go into 2 and 3 rd gear now you have to be at a higher rpm before it will go into gear ...i noticed there is a copper tube like a vacuum line hook up on the top of the transmission but nothing is hooked up to it. is there suppose to be a vacuum line from that going somewhere maybe to that vacuum chamber canister ? i dont know for sure what they did but i havent been back i think they just want more money and i need to figure out what they did.also now my wipers wont turn off unless i turn back on the delay on the switch and then i can stop them where i want.its a vacuum thing im sure...but whats the problem..... i dont know how to get to the proper place to ask tech questions so i hope someone can direct me in the right direction on that issue also.thanks any one for any help........ben........