Parish.....here are the videos with sound....the videos are of the tach and speedometer so you can see the shift (this was not the best road for speed or acceleration...it just shows the shifts at WOT)

1. 20mph roll dwnshifting to first and then up through the gears 1-2-3 ending aroung 82mph after the 3rd gear shift
http://www.fastruck.net/Video/2_1_2_..._downshift.AVI

2. Sitting still...hard straight line acceleration (no stalled converter/slightly uphill) with 2nd and 3rd gear shifts....ending around 85mph after 3rd gear shift
http://www.fastruck.net/Video/1_2_3_upshift.AVI

BTW...how do some of you guys hit the rev limiter in 3rd???....I shift at 5500 and hit 3rd gear right about 83mph

 

thanks for the vid, from lisening to those i would say you are geting the same thing as me. just didn't know what i was talking about.

listen to the shift, the first part is quick but then it holds the rpms or even drops them a hiar more just a little later.

 

Do you mean the way that it shifts hard but then the revs drop kinda slow ??...I think that's more of a function of the engine having ALOT of inertia that it has to bleed off to get down to the necessary shift RPM rather than the transmission not shifting fast

if you noticed in the videos it was hard for me to hold the camera steady at the shifts because it shifts so hard the front end yanks up hard on the 1-2 shift

 

hold on...I see what you mean about the it shifting and then the RPM's dropping like 50-100rpm AFTER the shift

I had never noticed it before you said something.....I still think it might be a function of the ratating mass more than it is the tranny

 

that sound you hear is what i loged on my truck, it is like you get 90% of the shift and then a sec later the last 10% of the shift. my truck is shifting great now that i got rid of all the TM and throttle body closing stuff, just that funny 2 part shift can't be good.

 

it's not converter slippage is it ???....I mean the engine slipping past the converter due to the higher 2nd gear ratio ?? that might be why the vehicle keeps accelerating even though the engine "bogs" and holds a steady rpm for like 1.5 seconds.....I think the shift IS complete but 2nd gear is so high that the converter can't turn it over efficiently right away until speed builds up a little so the converter "slips" to retain full power output

it's almost like the converter is "stalling" at the 1-2 shift

 

i dont think it is a converter thing. it is good to know that it isn't just my tranny.

i will continue to push this 4l80e and see how much it can take. i figure i am probably around 400rwhp right now. my stock 4l60e in the last truck failed somewhere around mid 13's. it would be interesting to know how much everyone gets out of their stock tranny and then compare it to when this stock 4l80e lets go.

 

welll...glad I could help you out (at least a little)

 

Mine does the same thing. Didn't matter what the shift times were set at. I put in all the base line pressure values from the Tow/Haul mode into the regular table to see if that would firm things up a bit. I have also went from full removal of TQM to 50% to where its at right now at 10% and not of this seems to help.

The converter shouldn't lock at all in 1st or 2nd gear (if I remember right) but I know when mine starts to make the shift into 2nd it drops very slowly...then feels like it finally goes in...then about 20' later you get what you feel like is the converter dissengaging.

 

For what it's worth .. since I put the bigger converter in, it feels like it falls on it's face when it does a 2-3 part throttle shift. It feels like it takes a while to recover rfom it too. I will see if I can't get some logs of whats going on.