Hey Bpopilek , Holycrap Bud you might be making me week , or maybe my month...What did you pull the front and rear driveshafts out of to make it work in your 80e swap and also just to be sure and safe with the info , Front and rear driveshafts should accept 32 spline input/outputs from the transfer case ??? I hope I didn't just make that part confusing... I would appreciate your input on this topic as well as anything else you'd like to share . I'm just about to start my 4L80e swap this weekend but I've been waiting on making any moves with the driveshafts because there is so little information out there for our particular swaps and what is out there has not very little for details , basically just what the did , not how he did it . ANYWAY long story short I would like to not have to cut these D.shafts if I don't have to and I've always felt that there had to be a front and rear driveshaft from factory that would fit mine due to the engine/trans combination that were available , maybe a 08 and up Yukon , Tahoe , Escalade ? Not sure what your running for transfer case but I'm a 2004 Yukon Denali w/6.0 w/4l65e , Transfer case is Borg Warner 4481 or (AKA) BW4481 its AWD all the time . I'm not going to be running the bw4481 I bought a used BW4485 which is the stronger , tougher brother of the bw4481 . It's got larger sprockets , wider chain , and the infamous 32 spline input/output shaft that is needed to marry the 4l80e to the transfer case and make this all work...Thanks in advance Bpopilek , Appreciate it...