Rear end ratio ?

[Rawze]

(10-25-2020 )the missing link Wrote:  If you look around on here , rawze has posted a calculator several times that will tell you the rpm at which speed depending on ratio .
Personally I would gear it to run at 1650 at 65 mph if thats what you like to run at .
But thats just me ...
3.90 would be about 1500 rpm at 65 I believe.
I also had 18 speed in all my trucks though , I did have one 15 speed actually.

I think you were referring to this..
http://rawze.com/forums/showthread.php?t...3#pid17353

btw: forum memeber 'the missing link' is a career super-B, heavy hauler. He knows what he is talking about.