Ok so I bought my 87 blazer from a friend 2 years ago and he had just put a level 3 700r4 in the blazer from bowtie overdrives. I have never had a cooling problem with it(after market cooler) and the engine is mostly stock the only things that I have changed is putting 1tons with 4.56 gears and 35 inch tires. I live in a place where there is not to many hills to mess with the rpms and the gearing. I was driving on the freeway and lost both 3rd and 4th gear. No I dont have the paper work for the tranny. So what is my best option. Its going to cost me about $1500 to rebuild it locally with the same quality parts or should I just buy a new one and from who? This is my daily driver and I do want to keep a overdrive tranny in it...