OK I did transmission fluid flush on my 02 4.4i

[RRPhil]

Originally Posted by TiAgX5

If I understand torque converter operation correctly (it is a viscous coupling, right?) wouldn't the viscosity of the fluid at operating temp control % of slippage? The friction mod pack would be to control bearing/band/drum slippage and wear.

Yes, it’s a hydrokinetic coupling when ‘open’


Impeller


Turbine

but I’m referring to the lock-up clutch operation which locks the turbine to the impeller (or, at low engine speeds allows a small but controlled speed difference)



It uses just a single, but large diameter, friction plate (shown in red above) :



Phil

[TiAgX5]

Originally Posted by RRPhil

Yes, it’s a hydrokinetic coupling when ‘open’


Impeller


Turbine

but I’m referring to the lock-up clutch operation which locks the turbine to the impeller (or, at low engine speeds allows a small but controlled speed difference)



It uses just a single, but large diameter, friction plate (shown in red above) :



Phil

That explains the friction mod pack controlling TC slip, thanks. If anyone could explain it clearly I knew it would be you.

[bcredliner]

Originally Posted by TiAgX5

That explains the friction mod pack controlling TC slip, thanks. If anyone could explain it clearly I knew it would be you.

Are you sure this isn't an arial view of the Dallas Cowboys stadium with a google map drawing of where to park?