It seems as though RamRod's drivetrain has been fine with his supercharger and 37's. Also Go with bedliner it looks great. Or atleast it did on my rig
Yes and no.... lol
I have been lucky in a few ways when it comes to this set up
1- the supercharger was installed by the dealer and they honored the power train warranty until it expired.
2- the warranty has covered two tranny replacements (once for the previous owner, once for me) I don't know the full details of the first replacement but I think it had something to do with an after market torque converter with a higher stall out limit. For my replacement it was the clutch disc's for the 3rd gear that were worn, it was still functional but I wanted it fixed under warranty while I still had it and it was cheaper to replace the whole thing then take it apart and replace the disc's
3- 75-80% of the wheeling I do is either in snow or sand. This, I'm sure, helps dramatically with saving the front diff since there is that much less traction and is much more forgiving on the drive train
4- I drive like a bit of a grandma and really only use boost to about 1-2 psi when on blacktop, and then 2-5 psi when on a loose surface (7psi is my max output)
With that said I have gotten quotes for both an upgraded 4L60e from PATC or from the shop that did the engine and trans tune a quote for a upgrade to a 4L80e with all the required PATC conversion parts. The two options work out to be about the same however if I go with the 4L80e I haven't included the cost of the new custom rear drive shaft and the 4L80e trans so it will work out to be about $1500 more
That day will come just don't know how far off it is
