Eventually while in the Black Hills in South Dakota the Bronco ended up like this.
While out there to camp and explore the transmission decided it wanted to let the transmission fluid go free. So thanks to a good friend we got a spare vehicle hauled to us and he took the bronco home for us. It was time for the transmission to come out and get a rebuild/upgrade.
The front pump seal was no longer doing it's job. Seemed like a good time to freshen up the C6.
While taking it apart I found a nice grove worn in a drum and some burned clutches.
With it apart and cleaned up it was time to reassemble and modify the valve body.
I upgraded both planetary gears to needle bearings from bronze bushings. As well as going to six pinion gear sets instead of three. Also swapped the thrust washers with torrington bearings.
![P1010096.JPG](/forums/data/attachments/44/44443-e6dfb3d327e56c84214b47183e1c4ba7.jpg)
And then time to reassemble it.
Next I drilled a hole in the side of the pan to weld in a bung for the temp sensor.
For a little added protection for the sensor I cut a piece of tubing and welded it around the sensor.
Made a bracket to mount the second transmission cooler to.
![P1010110.JPG](/forums/data/attachments/44/44458-cccd199f9721a87f739aa1fd6126c646.jpg)
I made the transmission cooler lines out of -6 braided stainless steel.
Almost back in.
Made a few changes to the transmission cross-member to make room for the exhaust and strengthened it up a bit.
Now with a lower first and second gear, a custom torque converter and all thrust washers replaced with bearings it was a whole new animal. A lot less power wasted on friction and even gained a little mileage.