Hello Shelby welcome to YT! Tractordata.com shows the rated RPM of a 6300 at 2300 rpm, so that one is a little lazy. Also take into account that the info Tractordata is not always correct. However, 1700 is quite slow for a modern 4 cyl diesel. Do you have access to an ownerís manual it would probably tell you for certain. Canít help you on your trans issue. If you donít get much response here there is a John Deere topic section here as well, see link.