a few questions about auto.tranny and brakes
 

put in rebuilt tranny last week and having a few probs.first when im running about 10 mph it feels like the tranny is trying to shift.it doesnt do it when i take off regularly it just does it when im driving at or around 10 mph.second my cruise isnt working now.they told me the tranny was out of an 04.third had to replace bearing units on front end also and noticed when i had the truck up on stands i had my son get in it and start it and hold the brakes and when i tried to tighten the axle nut the wheel turned real easy even with the brakes applied.sorry for the long thread.any help would be greatly appreciated.