Hello, Soon I will have a new to me 88 Suburban 1/2 ton. I have a few trailers I will pull with it, but the largest is 34 feet and weighs 6900 pounds. This large trailer will be near the limit of what the suburban can handle so I want to beef it up some. The 700R4 in it has about 50k since it was rebuilt. I am thinking to add a large transmission cooler and temp gauge to make sure the temps are already less than 200. I think it has 3.73 gears, they may need to be upgraded to 4.10 I am guessing. What else should I consider? I want to keep the IFS so I am not sure how to beef up the axles or if they even need it. I will be towing short distances, on mostly flat land. no mountains or such until I get some confiendce with the rig.