Transmission upgrade from stock - 725 Horse Power

[awd.nv]

completely agree. The 10R80 has potential if the manufacturing was good. Correct me if I’m wrong, but I believe a big issue is the bushing in the CDF drum which is notorious for replacement. Luckily there is an aftermarket CDF drum and parts that are better made, only down side is the price. But hey, if you want something done right & fixed gotta put that money out

The cdf drum and valve bodies seem to be the main issue. I have to look it up later but there is another company that makes premium parts for this trans. Its crazy expensive though as an assembly. They want like $10k+$4k core charge but surely that one is bullet proof. Good thing is they sell the parts separately so you can buy their valve body alone if you want.

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[TJC]

It is a chain reaction scenario (The Domino Effect) for the 10R80. The design is generally fine, but the parts are cheap, the machining tolerance specs are too sloppy.

Poor quality solenoids in poorly machined soft aluminum alloy valve body with a weak transmission fluid formulation starts the process. (A senior Ford engineer brought the fluid problem up to management and was shutdown. He predicted very high failure rates for the 10R80. LubeGard stepped up with their Platinum additive package)

Valve body solenoids start to stick, which cause fluid pressures to divert and starve the transmission clutches of fluid,

which causes overheating and fluid contamination, which causes clutch ferrous metals to accumulate on the magnetic solenoids (a feedback loop),

which aggravates the issues and causes thermal expansion of press fitted parts, which causes the CDF drum migration,

which closes off 3 important fluid ports, which causes catastrophic transmission failure.

Final Analysis: Ford cheaped out.

Options
1) Change your transmission fluid often and add Lubegard Platinum. If you catch the problem soon enough you have a good chance of returning your transmission to normal operation. This has worked for me.

2) Replace the valve with a 3rd party high quality unit.

Third party vendors looked at the super reliable Toyota transmission of the past, and started building a valve body with the same quality parts and solenoids that Toyota sourced, and engineered their own valve body to boot. They sell the valve body for $3500, and have a large waiting list of customers.

It is expensive, but quality usually is.