#2
Sounds like the pilot bushing in the driveshaft or the anti rattle springs are not allowing the clutch to release like it should. I'm not a fan of using anti rattle springs. I use HyTran oil in my IH Cub Cadets.
#3
I use Kohler engine oil in my IH Cub Cadets.
#4
Your 2nd gear is a 16 tooth gear. The later IH Cub Cadets 100-70s had a 19 tooth 2nd gear. I have one with a 19 tooth gear and it is too fast to mow. The 1X6 or 1X8 series has a 17 tooth 2nd gear. It is a easy change. You have to take transmission apart to change gears. 16 tooth speed is 2.9 miles per hour. 17 tooth speed is 3.5. 19 tooth speed is 3.9 miles per hour.
I have a 64 model IH Cub Cadet 100 with a 16 tooth 2nd gear and a 1965 model IH Cub Cadet 100 with a 19 tooth. 19 tooth is too fast and the 16 tooth is just about the right speed for mowing my thick grass.
#5
Odds are the rattling you are hearing is the holes in the clutch disc are showing signs of wear. The clutch driver pins and pilot bushing could be showing signs of wear too.
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