727 planetary interchange

Print Thread

Re: 727 planetary interchange [Re: Secret Chimp] #3210881 02/05/24 05:16 PM 02/05/24 05:16 PM
Joined: Mar 2011 Posts: 3,089 Michigan A A727Tflite master
A727Tflite master A Joined: Mar 2011 Posts: 3,089 Michigan	Originally Posted by Secret Chimp I need to get a new rear drum for my '67 small block 727 and am finding decent deals on entire drum/planetary assemblies from other transmissions. I still have a 3 pinion planetary so seems like a good time to upgrade. Would I be safe to drop in an entire 4 pinion planetary + ring gear + drum from a 904 like this? https://www.ebay.com/itm/304575839320 The only difference I can see visually is that this doesn't have the thin splined washer that was in between the planetary and the ring gear on my original. I have read that there was a change in the spline taper sometime around 1976, but I can't figure out if that would affect what I'm replacing or not. 727 and 904 do not interchange Spline angle only affects the front carrier/output shaft front spline. Last edited by A727Tflite; 02/05/24 05:16 PM.

Hop To