GEN 2 Possible Transmission Issue, something else, nothing?

Micha said:

How many miles were on the truck when you picked it up?

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1DXmk2 said:

I picked-up a Gen2 raptor (Black Screw, 802a, Tech and a few other things) two weeks ago and after driving a couple of days, I (and my wife) started feeling the truck not delivering smooth acceleration. Though its a bit hard to put into an accurate description, when accelerating within a gear (not between shifts, which are generally pretty smooth), the power output seems to fall back momentarily and then pull again, over and over until it shifts gears and then it does it again in the new gear. Once in 10th gear, if I accelerate, the power continues surging (pulls for a second, pause, pulls for a second, pause, etc. until i back out). In sport mode with moderate to strong acceleration, its very noticeable as the individual gears stay engaged longer than in normal mode.

I've been driving it hoping its just a computer learning issue...the transmission just figuring out when to shift and that it would smooth out. However, last Friday - in normal mode, sixth gear, moderate acceleration - the transmission slipped, leaving the engine revving and no power to the wheels. It fell back into gear after the rpms fell back. The next day, I tried to recreate the slip...didn't happen. But after I changed to sport mode, and with strong acceleration, the transmission got stuck in sixth and wouldn't shift up or down until i manually shifted.

Took it back to the dealer yesterday...they ran diagnostics, but didn't find any codes related to any of the issues. They drove it, but apparently they didn't push it very hard, and said they couldn't recreate the slip/stuck gear and all seemed fine. They admit they don't have any experience with the 10 speed and really aren't sure how it should be behaving. I drove it this morning with a service manager and he finally picked-up on what I was talking about with the power delivery issue...still they say they're not sure what it is supposed to be doing. They have another raptor on the lot and will drive it to compare.

So, long story short...has anyone else noticed inconsistent power delivery on acceleration like I (so poorly) described? Anyone else experienced a slipped or stuck gear (other than the few that have reported complete trans failures)? Should a slipped or stuck gear automatically create a code?

Any feedback would be appreciated.

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Muredhawk said:

Are you sure that the rear tires aren't slipping? Try some pulls in 4A and see if it pulls smoothly.

Also in sport mode it does do some ridiculous gear holding which is annoying but seemingly normal...

I finally got some 93 octane in my truck and it seems much happier now.

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