I have a '84 chevy s-10 with a 3.4 and 700r4 tranny. I am getting ready to put a 327 in in about a month so i really dont want to have to service my tranny unless necesarry, cause i have to have a differnt one for the other motor. It had been slipping out of OD for about a month or so, "i think the roller clutches were going" But today, it has been ticking when in park. It goes away once you are in drive. But if you get on it too hard it will fly out of 3rd and you have to let off the gas. As soon as you do it goes back in. Will i be able to baby it for another month or so or does this baby need overhauled?