2000formulaluvr

Rebuilt my 4l60e. Finally have it back in and running after a few hiccups.
I have a snap modis, I looked at the shift error times and honestly don't understand them. The way it reads is
1-2 shift .05
1-2 error .33
2-3 shift .08
2-3 error .33
3-4 shift .06
3-4 error .15

What the heck does that mean and is it important? I was just gonna reclutch this unit but found broken springs, valve body valves all damaged ( changed with a rebuilt unit), cracked accumulator piston, etc so I being a novice checked it 4 times before closing each section. I've gone thru this section since October to prepare for the rebuild, you trans guys on here make it sound so easy! Seriously tho I also went thru alot of stuff with a local guy, what to look out for, tricks he's learned after 30 years.
Also I don't think I had converter lockup on the test drive, may have used the wrong o ring tho. Had that happen before.

01ssreda4

iTrader: (96)

Its fine.

joecar

1-2 shift .05 means the 1-2 shift time took 0.05 s

1-2 shift error .33 means the shift time was too quick by 0.33 s

i.e. in your calibration the desired 1-2 shift time would be 0.38 s.

2000formulaluvr

Oh wow. Did I go too tight on the clearances then? I'm a diesel mechanic by trade and thought to dabble in doing my own transmission for my newest toy.

mrvedit

No, every performance built 4L60E will have faster than stock shift times due to larger holes in the separator plate, tighter 3/4 clutch clearance, etc.

2000formulaluvr

Yes! That means I got it right then. Yea buddy. Thanks guys.

joecar

You want the shifts to be as fast as possible.

You also want shift adaption to not slow down the shifts (set pressure change tables to non-negative values)... keep an eye on the shift times for the next few hundred miles, make sure they do not get longer.

2000formulaluvr

I'm sure I will. I check everything constantly in the pcm on all my cars, trucks. This unit is in a blazer. My other is in one of my firebirds.