Just purchased 99 Maggie SC C5 with many "supposed" upgrades. long story short is that I was misled.
Car was supposed to have z06 rear with 3:42 but original pumpkin looks original with 3:15 gear tag
Trans went out after a few days of normal driving 3-4 gear slip but apparently had been freshened up with some high quality parts verified by the current builder.
Had trans rebuilt with a new Yank SC 3000 stall converter. Car was shifting very hard like before but felt good with no slipping.
I was very easy on the new trans and TC doing no full throttle or launches until 250 mile break in.
Never made it that far..... same symptoms showed up again as driving easy and starting to slip in 3 and 4.
I had not changed anything in the tune because I was being easy until break in plus I'm just now learning.
Would someone please look at the tune?? The trans is supposed to be built for +600 ft lbs and have a 1 yr warranty but trans rebuilder is wanting tune looked at first. Old tune should have been for stock TC I believe.