trans problems with gryphon

[cleatus12r]

I see you have a 2006 with a 5.4L.


Well, for 3rd gear, the only different apply component for 3rd gear operation is the direct clutch. It is used in 3rd and 4th gears. You mention a "whining" sound. This can be either stripped splines on the friction elements or a possible unseating of the snap ring that holds the frictions in the drum.

Either way, a flush WILL NOT fix it. It is broken.

The problem with a transmission that shifts too quickly is that hard parts (like splines and one way clutches) really pay for it. The friction elements really love quick shifts. Like DJ said, it's a real trade off for shift feel vs. longevity.

There is a VERY GOOD possiblity that over-running certain apply components during a shift (and shifting really quickly) caused a reversal of rotation that was just too much for a mechanical part to sustain too many times. I see it a lot with forward sprags in 4L60E transmissions when people "rock" their vehicles when stuck or shifting to drive while still rolling backwards out of a parking spot or driveway.

In any case, I think you have exceeded the mechanical limits of your transmission by high RPM full load shifts with too much TV pressure.

Sorry.