searches turned up nothing like what I think I"m seeing..

Not always, but on occasion, seems like more so under light acceleration, My v10 with the 4r100 will shift fine thru 1 and 2, but on 3rd, it shifts, then seems to drag the rpm down momentarily, then on to 4th, which seems fine also.

The tranny fluid has been recently changed, and I'm not sure if this really is an issue, just something that has me wondering.

I thought maybe my engine is just a little weaker than i think it should be and it really is bogging down, but this is unloaded, and it seems to do the 3-4 shift just fine. 60k on her if it matters,

Any ideas on how to drill down on the problem, or just drive it till she wont go, then figure it out. thanks for any input, i have a 5 star tuner, but not sure of whether i have access to pressure options, or even if i should play there.

 

You are describing the torque converter locking. At light throttle it is much more noticeable. It sounds like it is working as designed.

 

thanks Mark, I value your opinion