It's probably just the cold fluid man, the viscosity is higher till it gets worked.

 

mine does the same thing...i hate it.

 

mine will never shift hard enough for me to be happy.......no matter how many servos and shift kits i put in it :shrug:

but yes your harsh shifts are caused by the trans fluid being cold and being too viscous like freewood said

 

^ That's what I figured.. As long as there's no cause for concern.. My first car had a stripped case from the L/R clutch pack from the previous owner doing too many neutral drops. (700R4 = junk)

Just makin sure.

 

Its a 4L60-E.

Very common in cooler/cold climates. Mine does it till the trans temps get up.

 

Hard piston seals in the clutch pack will cause that also, but cold weather plays a big part in trans issues.

 

Sounds like a fluid issue like everyone said. 1-2 requires intermediate band to apply, most like mine do the slide-bump 1-2. I do know there is a tune update for improved 1-2 shift quality on our trucks. Might help, but paying for a tune that might or might not do anything is not in my budget. I would just pay attention to it and only do anything if it gets worse.
Oh by the way 700R4 is also called a 4L60. So add electronics and you get the 4L60E like the one in your truck, great transmissio, does have some flaws (reaction Shell snapping), but all trans have achilles heels.

 

I appreciate the responses guys..


I'm gonna do a service on it soon. Going to do some RP oil. It won't need to be changed very often, so I'll try some expensive fluid and stuff that will last a long time.

 

Mine did it today for about 10 minutes in traffic then was fine. I also noticed with the elimnated intake res and k&n filter with no cover on the box it shifts wierd sometimes. Like if I go to floor it it will kickdown for like 2 seconds then go into the next gear without holding the passing gear or w.e

 

Mine will do that in the first ten minutes or so of it running, then it's fine. I'm not worried, I'm just waiting for it to die anyways!

 

I know this is an older posting, but anyways I will comment:
do people know if installing a new 1-2 Accumulator will solve this problem, or is it not related?