Well, you are in luck, it was an easy find. First page of the update manual:
TCC "PWM" SOLENOID ADDED IN 1995
AND NEW OIL PUMP ASSEMBLY FOR 1995
CHANGE: Beginning at the start of production for 1995 models, all THM 4L60-E transmissions were build with an added "PWM" solenoid on the valve body to control TCC apply feel. The new TCC PWM Solenoid ramps the torque converter clutch on and off, as in most other GM units.
But I guess that is a bad choice of words... You are not in luck because the TCC apply changed in the 95 transmissions... You need a 95 thru mid 96 transmission to get it to work properly again and still have a single piece case. From the ATSG manual, it looks like the bolt on bell housing started production sometime in 1996, but I do not think it made it into Blazers until sometime in 1997. A transmission with the bolt on bellhousing can be used though.
I love these manuals! I need to get the ones for the THM 350, THM 400, and the THM 700-R4 as well.