been looking into this alot. Both the same, and that is correct #Im getting ready to drop my pan and change the filter soon. Just did a vette servo and trying to figure out my harsh shift. It happens from 1-2, and 3-4. Sometimes its there and sometimes its not. Kinda sounds more like a chirp. Trans does shift hard though when it makes the noise. Im not getting any codes or slipping. Shifts normally just hard with a little clunk or chirp sound. Is this related to the solenoids? I was planning on swapping both out while i drop the pan if this will fix my issue.
http://www.amazon.com/ACDelco-24230...s_auto_2?ie=UTF8&refRID=0R3K8NYRPC3E11Z06QQ6/ ACDelco 24230298 is the part number im coming up with for both solenoid a and b unless anybody can correct me.