Tranny question, Hard 2-3 shift (AUTO)

[rsm688]

Okay guys well I made a post before about if H3's had firm shifting. After spending a little more time with my H3 it seems the main time I have a hard shift is 2-3. 1-2 is a little harder/more noticeable when going up a hill/from a slow start with a heavy foot, 2-3 is always a little harder than the others and almost feels kinda like it jumps a little. I've watched the RPMs and it seems they drop around 250-300 after the shift. The RPMs get up and then a firm shift and it drops down. It is definitely a lot more noticeable going up hills or when I've got to get the momentum going. If I am going very light/smooth or going downhill it is not nearly as pronounced. Any ideas on what this could be? Everything higher than the 2-2 shift is smooth as glass and 1-2 is usually pretty smooth, just mainly that 2-3 shift that seems to be a good bit harder/more noticeable than the other shifts. Does anyone else have this issue? Is it just the gearing in the tranny or do you guys have smooth shifting through all the shift points?


Thanks,
Spencer

 

[CaseyS]

Google "4L60e 2-3 shift flare"

Did you ever deduce that you had a tuned PCM? Higher line pressure settings will cause snappier shifts.

 

[rsm688]

Google "4L60e 2-3 shift flare"

Did you ever deduce that you had a tuned PCM? Higher line pressure settings will cause snappier shifts.

Casey, I never could make a firm decision. My speedo was within 1-2mph of my iphone GPS (not sure how reliable that is). The previous owner had the H3 for 2.5 years and was a bit of a redneck so he probably didn't do it, it did have some very worn 35s on it but other than that it was bone stock. I'm not sure if maybe the original owner did or not. I figured that it would be more uniform in shifting harder through all the gears instead of just 2-3 if that was the case.


I will google the 2-3 shift flare and see what I can learn on the subject, thanks for the pointer.


Also, I have brand new top of the line fluids in the tranny (sucked all the old out of the torque converter so it's all fresh), it also has a new tranny filter and my mechanic cleaned the valve body too. I didn't drive the H3 but 10 miles before all that was done but I did notice it seemed the same way before/after fluid/filter change.


Thanks,
Spencer