We have an older tr70, with the turbo ford engine that is used with our tr95 during combining season. The 95 can run circles around the 70, but my young son likes to use it and help out. Problem is that the 70 does'nt want to chop straw. Defection plates way been adjusted in all positions, new chopper belts have been installed, every thing checks out...but still not chopping straw. When you look at the swaths that the 70 had done it has balls of straw left behind it. We took the triangle inspection plates off the rear sides of the combine and watched the straw coming out, most of it seems to fall short of the chopper. Up hills it does better, but downhill you have to be careful as we have plugged it solid. By that I mean the whole rear is plugged right up to the back of the rotors. Any ideas of what the problem might be or if anyone else is having this problem. The 95, even though she's old iron, can and will give the new combines a run for the money, 30 foot straight cut no problem.