4T60-E problems, 1995 Silhouette
For the past month or so, I've been having troubles with my 1995 Silhouette L27 3.8/4T60-E.
The trans is slipping during 1-2 upshift.
Down shifts harshly when coming to a stop like the lock up converter isn't unlocking.
And once in awhile at take off, it will act like it'* stuck in 3rd gear until I manually downshift into another gear.
This is very intermittent and will do it whether it'* hot or cold.
Now, if I leave it in drive instead of overdrive, I get none of that static. No slipping, no harsh downshift, no third gear starts.
I put a trans cooler on when I got the van because they produce so much heat that they will kill the trans is pretty short order. I've ohmed the solenoids and they check out. Using TunerPro, I have no stored codes in the computer. The trans runs at about 180 degrees tops under any conditions.
Not long ago, the idiots at Jiffy Goob talked my wife into a trans flush and I'm wondering if that hadn't caused some problems.