Fixing '98 Electronic GM Automatic Transmission 4L60 setting code 1870?

 I have a '98 Blazer with a 4L60 Automatic Transmission that shifts rough after it warms up  into second gear and sometimes third when leaving a red light or stop sign. After I stop the vechicle for 10 minutes or so, it shifts smooth until it warms up again.  I was told not enough transmission fuild was flowing threw a checkball inside the trans? I was hoping to fix it without rebuilding it or a high price tag. Anyone have any knowledge on this issue?

NachoMahma7 years ago
.  First thing I'd check is the fluid level.
.  If the level is OK, I'd change the filter.
lemonie7 years ago

Does it have enough fluid? (you didn't say)