i have a '04 sierra. it has the shifter on the floor. i was using the 4L for backing up a hill trucking wood. It was working fine for the first few loads, then when i tried putting it in 4L, it would'nt go in (gears grinding), then a hard shift from N back to 2L. I then tried puttin the truck in park, and it shifted to 4L fine. This works off and on. Sometimes it will shift fine into 4L from N and sometimes fine when going from park. The truck shifts fine into 4H. With the truck shutoff, everything shifts perfectly. And idea`s or suggestions would be greatly appreciated. Thanks.
