Eventually while in the Black Hills in South Dakota the Bronco ended up like this.
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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.
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The front pump seal was no longer doing it's job. Seemed like a good time to freshen up the C6.
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While taking it apart I found a nice grove worn in a drum and some burned clutches.
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With it apart and cleaned up it was time to reassemble and modify the valve body.
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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.
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And then time to reassemble it.
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Next I drilled a hole in the side of the pan to weld in a bung for the temp sensor.
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For a little added protection for the sensor I cut a piece of tubing and welded it around the sensor.
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Made a bracket to mount the second transmission cooler to.
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I made the transmission cooler lines out of -6 braided stainless steel.
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Almost back in.
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Made a few changes to the transmission cross-member to make room for the exhaust and strengthened it up a bit.
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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.