i'm learning how to play bass trombone for my schools jazz band. if somone knows a good bass trombone postion chart online please let me know where it is.

that helps alot. i think. as far as i know the one i use at the school is a d attatchment. i think i've heard you say that you've played bass befor. do you have any advice for someone new at it. i don't have any trouble atall at low notes on my tennor but bass is a bit diferent

It's a beast, isn't it?!?!?! We jump over to the dark side thinking it won't be that much different, and end up with a big surprise, especially if you're still working on tenor!
Private lessons are definitely the way to go, even better if it's from an accomplished doubler.
This sort of thing really needs to be taught in person. But I will say, that if you have a serious work ethic, discipline, and a lot of patience, the Phil Teele "Advanced Embouchure Studies for Bass Trombone" can really be a big help in developing your bass bone chops.
Good luck! I wish I could help you more.

actualy you've helped alot just by sending me that chart. so thank you so much
i've got the natural build in my lips for a trobone. i could hit pritty much all of the possible notes on a tennor(talking about low notes (to a 6th space c)). so i've learned all about the exteme lower register and i can get good clear tones on a tennor
but bass is so much more powerfull, speaks better on the peddle c's and b naturals and is just amazing. it blew me away when first picked it up. takes alot more air but i'm really going to enjoy it. it fits my personality.
i got a quick question
i've been using my normal mouth piece (5g) on the bass. do you think it makes that big of a diference with a bass mouthpiece.

You need to get a 1 1/2G. The 5G is much too small for the bass. The cup size and backbore of the 5G don't allow you to push enough air through a bass trombone. A 1 1/2G will make all the difference in the world. Try one and you'll see why.

I agree that you need to go bigger, though I won't make the blanket statement that a 1 1/2G is the mouthpiece for you. Some players, especially doublers get decent results splitting the difference, something along the lines of a schilke 57. I used something about that size as a transitional mouthpiece for a while before going to a 1 1/2G. But that 5G is way too small. Like bob said, you won't be able to get the air flow you need. Again, a teacher will help you better pick the mpc size right for you.

Steve's right on the money. As a beginner on bass, you might want to try something along the lines of a Schilke 57. The Bach "equivalent" would be a 2G. The Wick mouthpieces are also very nice. I have a 2AL, which is like a 1 1/2G, so you might want to try a 3AL.

It's funny you mention the Wick 3AL, that's actually what I was using.

My bass trombone mouthpiece now is a Griego 1.25 Deco. "Deco" means that there's extra weight around the mouthpiece throat. Two other ones I used for a while were the Rath 1.25W and a Doug Elliott 112/K8. The Rath felt a little too big, and the Elliott seems to back up on me sometimes. But the Griego feels just right and has a great high range, as well as being very open in the low range. Most importantly, I love the sound, and that's what counts most.