Ok have had some people asking for a write up on this swap so I am going to get it started. I did the swap with a "donor truck" However it is not needed I will attempt to explain both ways. Here is a list of the Parts you will need using a donor truck: 01. 4L80E Transmission, Torque Converter and transfer case adapter 02. 4L80E Flywheel 03. 241 Transfer case w/larger input shaft 04. transfercase Linkage Rod from 4L80E 05. Rear Drive shaft SHORTENED 1 5-8" 06. Front Drive shaft LENGTHENED 1-5/8" 07. Wiring Harness 08. VCM 09. Computer Tune Depends on the Year of the 2 trucks 10. Transmission Shifter cable BRACKET the cable will work 11. Transmission Mount 12. Transmission cooler lines First things First after you have the old transmission out. Make sure you install the cooler lines from the donor truck BEFORE you install the 4l80E. Ok The 80E will bolt Right up to the 5.7 bellhousing, however the Torque converter WILL NOT bolt to the 60E flywheel so you will have to use the Flywheel from the 80E donor truck (trust me I found this out after I already had it in). The 4L80E has a case length of 26" as where the 4L60E has a case length of 23 3/8" For a difference of 2 5/8" Some of this difference is made up with the 80E's transfercase adapter being shorter then the 60E's. There fore the Difference in the OAL (over all length) of the Transmission and Transfer case combined is 1-5/8". You will have to SHORTEN your REAR driveshaft 1-5/8" and LENGTHEN your FRONT driveshaft 1-5/8". Also note that with the combined length of the transmission and transfer case you will have to move your cross member back. APROXAMENTLY 2.5-3.0". when you slide the cross member further to the rear you will want to hang the Transfer case on the transmission BEFORE you install the cross member. Because when you slide the transmission cross member back it moves it closer to the cross member for the torsion bars which doesnt give you enough room to put the T-case in. Now that you have the Flywheel, Transmission, Transfercase, and cross member in you can go ahead and start hooking up all your electrical connections, driveshafts, exhaust, converter and dust cover is you havent already done that. If you are using a 4L80E from a donor truck it is going to take aproximetly 8 qts. of fluid and the Transfer case is going to take aproximently 2.5-3 qts. Now That you have all that done. The 80E has different shifting points and different electronics so the VCM out of your truck will not operate the 80E correctly. Depending on what year your truck is and what year the donor Truck is you may or may not have to have it reprogramed. I did reprogram mine HOWEVER I would not have needed to as both my truck and the Donor truck were 96's (no anti theft system) I could have just plugged the donor trucks computer in it and been fine but I didnt learn that till I already sent it off to have programmed. If your truck or the donor truck has an anti theft system you will need to have it reprogramed (1998 and up). I am not going to list the Programmer that I used, simply because I feel they took advatage of me when i asked them about needing a program. I was also taught that 2 wrongs dont make a right. I will how ever help you find another programmer if you need it. If I left anything out send me a pm and I will add it. I will also explain how to do the swap with out a donor truck tommorow. Any questions feel free to ask me.