are most all of the internal hard parts interchangable. my problem ordered a fresh rebuilt trans for my 2007 1/2 new body style trans. according to my trucks glove box code and the chevy dealer near by it was suposed to be a 4l60e. it is not. as soon as installed got trouble light on dash.shifted hard and the trouble code turned out to be no signal from turbine speed sensor. purchased from a very reputable tranny builder in Georgia but after 5 phone calls im beginning to get the feeling that they dont want it back for an exchange for the proper 4 l70 e that it now looks to need. the trans i took out[FACTORY] has15 pins. they have been really nice but we never get to the place of doing the deal even tho the correct trans will fetch them another $400.00 PLUS SHIPPING. so to get to the point i m wondering if i should just bite the bullet and tell the local,very reputable shop to tear apart the new trans and rebuild my old one with as many of its parts that it can,especially because there are a lot of upgraded or modified parts i paid for in there. any good advice would be appreciated because im pretty much out of $$$ to fix this and CALI wont even let me re register my truck with any trouble codes still in existense. ps just removing the codes wont do it either.