Auto Trans. Shifts real hard into 2nd gear and hard shift into Rev.

Good morning and welcome aboard Stitch.
By no means am I a good tech here, we have some of the best of the best tech's to help you along.
It could be your kick down linkage to your throttle, that runs down to your trans.
Does first gear wind way out and shift late, or can you just stay off the gas a little and it shifts to second almost right away. If it is set to far forward it could be keeppng your pressure valve on your trans to far open at start up and just giving you to much presure off the pump to your clutch pressure.
I will see if I can find a picture and see if it will help, But like I said there are many tech's here that are more qualified to help you on this.:happy10: