So, $4,000 in parts and labor and is it still knocking? Not saying the Suncoast converter is a waste of money, but this seems like just a ploy for youtube views and patreon $$$$.
Who diagnosed the "cracked" flex plate?
Have the injectors even been checked?
You can turn them off one at a time with a scan tool to see which one could potentially be knocking.
Just my $0.02 (USD).
Justin 2001 LB7 Silverado 2500HD LT CCSB 4x4.
EFI Live by Idaho Rob, 536K+ and rolling, Undercover Bed Cover, Vortex spray in bed liner, Odyssey Extreme Batteries, Westin steps, Bilstein Shocks, Road Master Active Suspension, M/A Pump Rub Kit, PPE Trans Cooler, MBRP 5" Exhaust, Edge Insight CTS, K&N drop in filter, AirDog II 100 w/ CAT 751, LLY FF Housing w/ Racor, Running on LMM Blacked out Wheels & Michelin LTX M/S2 tires.
ADRENALINE TRUCK PERFORMANCE
Lincoln Diesel Specialties