dsraven, your curiosity is as mine was once I decided to do the double overdrive.
With the TH350 and Gear Vendors and 3.73 rear end, I ended up with a final ratio of 2.91, plus or minus.
With the 2.91 ratio at 65 MPH I was approx. 2100 RPM.
My new numbers changing to 4.11 rear and double overdrive puts me at 2.50 final ratio. Dropping me to 1800 RPM at 65 mph.
Rarely with the 2.91 ratio did I need to change out of O.D. so I figure I'm right on the fine line here.
I'm always looking at what changes I can make to have more fun with the truck, being able to go with a higher ratio gear start off, then going to the other side of the possibilities and easy cruise at 65 or more.
Now, this is not cheap, I don't care. I committed to do the best I possibly could back in 2011. Regardless of time or money.
