Upgrade really, the 1800 stall converter was too low for the ZZ4. The previous rebuild would lock the converter in 3rd. Even in 3rd the motor bogged down too much. A new 2500 RPM stall should do the trick.
The 3-4 clutches and band were burned up. I have a nice reminder down the street. Tire marks will be there for months!
I can't wait to try the full throttle 3-4 upshift. The option was available on police and some performance cars. The new hard parts should hold up to 600 ft/lbs of torque. All the shifts will be positive and firm. I'm waiting for an Edelbrock bracket for the TV cable. I did not run one before, but this time I will. Don't want to be set back again.
The rebuild is a level 4 Raptor.
http://www.transmissioncenter.net/700MegaRaptor.htm
The previous rebuild had some updated parts so the costs could have been higher. This time, 12 months or 12,000 miles because it should hold. The tranny guy says I'll be smiling ear to ear.
Notice the large cover on the servors? Both the servors were upgraded. The Corvette servo was replaced with a larger one. The only thing missing is a Vette govenor. I have one ready to put in. I'll wait to see how the stock one holds up. If shifts are under 5000 RPMs, the Vette governor goes in.