souliswinter wrote: ↑26 Jan 2019, 10:43 Finally, my 4HP20 failed @280,000km after full throttle acceleration up to 170km/h on the highway. Probably failure occurred in the TC, still waiting to be taken apart. ATF leakage could be the cause leading to this failure.
That was not a bad life for an HP20... Some live a little longer but most die before that...
It is critical you have the TC rebuilt along with the gearbox itself... The TC lockup clutch failing is often the cause of the 'box dying...