transgo kit install: should i replace solenoids while im in there?
Every now and then on Ebay I see OEM AC Delco harness kits with all solenoids for the 4L60E. It includes the New Harness with TCC Solenoid, New A and B Shift Solenoids, Manifold Pressure Switch, PWM Solenoid, 3-2 Downshift Solenoid, and EPC Solenoid for right around $100 shipped.
The AC Delco Shift Solenoids can be had for $10-15 each online. So it is up to you if you want to throw out the extra cash.


