Well i bought an 85 bronco II 4wd with 3" lift and 31's and stock 3.73s, and i've been trying to get the thing running right, anyways it has the A4LD auto tranny. on take off it feels like the converter is slipping, u have to give it alot of gas to make it go. forward or reverse. when u are driving it accelerates really slow, i know the bigger tires play some part in that. when it shifts its smooth, but over 45mph its constantly dropping down into 2nd and 3rd, and can still barely pull a hill. i dont think its an engine problem as it seems to be running good. sometimes at stoplights with my foot on the brake it sorta lunges forward. i havent changed the fluid or filter yet, but the fluid level is fine. any ideas on what it could be?