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The 6L80 has way better ratios. First is way lower and the 2nd overdrive is taller. So Im looking at $3k for a reman NV4500 with the whole install kit from AA. Add clutch pieces and a pedal bracket, that puts another $600 in the mix. Bonus for not having to refit driveshafts. I think the only...

While I am sitting on tech support hold to fix junk Briggs and Stratton generators...I'm snooping around in this 6L80. https://vcmstore.com.au/blogs/news/basic-6l80e-6l90e-tuning-guide So it appears you can change spark timing adjustment during all shifts, factory appears to kill 20 degrees...

I am sure it does, that type of shift strategy was pretty much the standard even back in the day with the single step shifting 4 speeds. I remember doing superchargers on the Toyotas and it had so much bog during shifts, it was the only way to keep the aw4 from exploding with all that power. I...

Not sure what you are referencing but the 6L80 was meant to work with all the high output V8s. It's good for like 600hp stock. Sent from my Moto G (5) Plus using Tapatalk

With the cost of an off the shelf 4L80 controller, I would consider a 6L80 instead. Sure itnis more money but why not have a 4:1 first gear and dual overdrives? I am really trying ti convince myself to stick with an NV4500 but that 6 speed sure would make the 6.2 more tolerable in every regard...