Just purchased this truck and the PO said it had hesitation issue for the last month. Well, today I was on my way to work and thought I would find out what was wrong. It doesn’t go into OD. The rpms don’t drop at all with the switch on and doesn’t increase with the switch off. At 63 mph, approx, the truck jerks and bucks and if you try to go faster the rpms go to red line. You slow down below 63, and the truck drives normally. No issues with shifting at all at low speeds. If you nail it off the line it will shift like normal and engine runs normal. Basically the truck will not go over 63. Need help with this issue.