I am getting ready to rebuild a 4x4 C6 transmission and have a question about using 4R100 forward and reverse planetaries. Are they a drop in using the 4R100 sun shell? Also I might be able to pick up a 4R100 out of a 1999 diesel - would that transmission have the more desirable steel 6 pinion forward planetary?

Thanks FTE!

 

Post 9 here, the link to PATC. Page 4. First link is the thread, 2nd should be the page in question:

https://www.ford-trucks.com/forums/1...o-rebuild.html

https://transmissioncenter.net/produ...rd/c-6/page/4/

Another source:

C6 Low Gear Planetary - TCI® Auto

Link in post 2 works if need be:

https://www.ford-trucks.com/forums/1...-question.html

Great links in post 3 if you can squint hard enough to read them:

https://www.ford-trucks.com/forums/4...ide-ratio.html

Another kit:

Wide Ratio Gear Kit with Needle Bearing Kit - Broader Performance

The parts lists and instructions from those sites ought to aid the DIY effort, or switch you to pulling out the credit card....ymmv. Good luck!