Hello all,
Trying to dial in problems I'm having with my 4L60E.
First off, it lacks power coming from a dead stop. I'm having to put in almost 2,000 RPM in order to get the wheels turning. Cruising on the road, it shifts through all four gears and ends up in 4th at 30 MPH. I have verified that my tire size and gear ratio is correct, and I have also cross referenced my MPH with other sources to verify the output on the HPT interface is accurate within 1-2 MPH.
Today it actually stalled as well, which has never happened before.
Attached is a copy of my current tune as well as the log file from today's test drive. Any ideas? I'm about ready to turn the 4L60E into a doorstop and find a good manual transmission to stuff back in there. Test Drive 9-28-22.hplExperimental Tune 6-27-2022 from 2005 Chevrolet Express 6.0L.hpt