i do not see why all guys complain about these 4l60e's my friend has one in his 2000 behind his 6.0l tbss motor with a couple minor things done to it and the tranny has held up for 2 years being beaten and pushed like a mule everyday. if you say that tranny was built you should be able to have most of the upgraded parts taken out of that tranny any put into yours if need be.