I run the Passon hemi overdrive.
4.30
28" tire
340 stroker (418)
I received a gear set early this year because of my stupidity but that is a whole other story.
I did not have any issues with Jamie Passon he was very helpful. I did have to wait awhile because of covid shutdowns :-(
I have been working on a big block stroker combo and picked up a tr6060 from an 11 challenger and converted it to a t56 magnum. OD drops to .50 Doing some digging I would be same rpm area as the 11 challenger if I run 28" tire and 4.10 gears.
Would I do the passon hemi OD again? It has its place and I have no complaints with it. Bolt in and drive (18 spline input)
Why the t56?
I have a habit of looking at things and wanting the challenge. Big block and double overdrive and possibly some fuel economy sucked me in. Likely rarely use the 6th gear but I could blast down the highway at 100mph at 2500 rpm with 4.10 gears
Here is an rpm calculator that I have played with over the years.
Speed/Tire/RPM calculator
