Hi guys,
Please help, '98 LXI, 60K miles, trans was serviced always. Had the dreaded solonoid bank Buzz from day one, decided to change it out for the hell of it, installed new one, drove fine, after one day while driving it didnt go into any gear, took apart, it was nasty, convertor clutch blew up, rebulit trans, new convertor, another new solonoid bank, etc.
Tested it, goes into Limp mode after trying to get into 3rd gear, then did 6 port and procedure tests, these are the only 3 problem ports: (other was within specs)...
3rd test: Overdrive clutch tap: (pressure should be 5 psi):
Actual is 125 psi and drops down and holds steady at 75 psi.
4th test: 2/4 Clutch Tap: (pressure's should be, 75-95 psi at 20 mph and
5 psi or less at 30 mph):
Actual is 0 psi at 20 mph and 30 mph.
6th test: Reverse clutch Tap/Post: (pressure should be less then 5 psi)
Actual is 75 psi.
Did another fliud change (mainly to check pan, and oil, etc.). It runs fine until going into 3rd gear, then goes into limp mode.

Thanks ahead of time for your help, : )

 

It also shows codes: 23 2-4 OD pressure switch circuits
80 Body computor odomater failure.

 

If you didn't flush the cooler and lines, that rebuild was a waste of time.

 

THtech, flushed it with pressurized solvents in standard and reverse directions, including heated solvents, used more then 4 times the required amounts (over 3 gallons), and also installed a quality external filter in the cooler return line.