Six speed Allison automatic transmission that came out a 2007 classic 4wd LBZ Duramax truck. Good working unit with just over 300k miles. No core charge.$1500 cash onlyNot interested in trades of any kind.I will not hold this item on your word...first one to show up with the cash gets it. If you are serious, you can PayPal money down to hold it.Call, Text, Email Text is best as I am usually not by my phone or dont hear it If you call, leave a message and I will get back to you as soon as I can. Because of all the botsscams I will not call you back if you dont leave a message ifwhen you call. six-zero-eight seven-nine-zero seven-five-two-sevenThanks, Keith