I have a very good 4L60E transmission out of a 1994 c30 conversion van/ motor home. That works perfectly as it should. No leaks no slipping no anything it's not supposed to do. I'll take $400. Bucks for it. And I'll give you a 30 day guarantee that I'll stand behind . If it's not exactly what I said it was and if it doesn't work exactly how I said it does. Bring it back and I'll give you your money back. Thanks (530)983 74one8