I need some help with tuning on my 4L60E Trans in my 2000 Chevy Silverado 1500 5.3L 4x4. (Mods Posted Below)
1st
It seems all the information I can find on tuning the trans is vague at best or just references the BC Trans Tool (Which was done) The issue I am having is when rolling between 35-45mph and I go WOT it will kick down to 1st gear but I'm almost at my 2nd gear shift point already as the RPMS will jump almost to the 1-2 wot shift point. It really feels like it should be dropping into 2nd and not first. Almost like when you do to down shift on a manual and miss the gear you want and redline the motor
2nd
Having a really hard 1-2 shift at part throttle. It is pretty violent but firm at the same time. At first I thought maybe it was something mechanical in the trans, replaced accumulator pistons fresh fluid and filter change and pulled the valve body to make sure the check balls and everything else was ok. I couldn't find anything mechanically wrong with it, although I know someone has been in the transmission before as it had the nylon ck balls in it and a new plate.
Here is the tune I'm currently working on, if any of you guys with more experience then me can give a few pointers I would greatly appreciate it. I'm working on the VE Table currently and would like to get the trans dialed in a bit better before and WOT Tuning. Trans does feel strong and doesn't feel as if its slipping any. Unfortunately I don't have a log with a WOT run right now to post along with my tune file.
MODS:
BTR Stage 2 V2 Truck Cam
LT Headers/Y-Pipe/Dynomax Exhaust
K&N Cold Air Intake
Yokohama 31.6 tires on stock 16" wheels.