I am helping a friend with a 1999 Chevy Silverado 1500 4x4 with 5.3/4L60E. The engine was rebuilt and has a TSP 228R 112LSA, Prof Products "Ls6" manifold, Professional products 85mm throttle body. He had a mail order tune and felt very sluggish. The transmission was slow to shift 1>2 and then would quickly shift through the rest of the gears and sit in 4th. The transmission was rebuilt and upgraded after the engine was rebuilt and claimed to be able to handle ~500hp from the shop that built it.
I have read through a few of the transmission tuning guides and have made improvements but it feels like the shifts could be better. I removed all of the torque management based on what I read here and the fact that the transmission is built. I have attached the tune, scan of driving and config file. Any input would be appreciated. I have tuned my engine with HP tuners but I have a T56 so this is my first time diving into the transmission side of the software.
Specs:
1999 silverado 155 4x4
5.3 w/ TSP 228R 112LSA
Prof Products "Ls6" manifold
Prof Products 85mm throttle body
Built 4L60E
4.10s
285/65/18(32.7") tires
1.2.15afterchanges.hplNoah1.1.15trans#2.hpttrans problems.cfg