I just pulled apart my 47rh i built last winter to look it over and swap in a billet output. The only issue i had was i had swapped in a 6 pinion planet in the rear and didn't change out the sun gear for it. Then my stock sun shell is stressed a lot so i would have to update to the 48re style. Every clutch count was increased, full manual valve body, billet input and Goerend convertor. Now with my current build in the works i plan on sending alot more though it . Its not that hard to do by yourself just take your time and double check and double check. If you have any questions feel free to send me a message. I even still have it in parts on the bench to help with anything.