Gear Ratios: Misinformation at its worst.

I’ll stand by my compromise gearing.....

600 Cat / 18speed / 3.70 / 11R24.5 tall ......

won’t get 8 mpg but does a great job up to 114k the most I’ve scaled on it....

 

I think the 15 double over deal came from the days of the 5x3. There was a combo where the mains 4th was direct and 5th was od. The 3 speed aux had 1st=under, 2nd= direct, 3rd= od. So technology a double over. I’m not sure of the actual od ratio but I have this combo in my great grandfathers Diamond T and they always referred to it as a double over.

To go into od in the main you have to cross back over from down right to upper left were reverse is in a normal 13,15,and18.

 

Not too sure. My RTO-15615 is just a single overdrive of 0.78. Auxillary section consists of deep reduction, low and direct. Only overdrive is against the dash with the main box.

 

Up hill doing wheelies and breaking scales.

Just squeaking by the triple digit mark on Low pros

 

Spec a truck to run 1150 then ##### why it won't last a million. Because being just above idle all the time is a swell idea

 

No triple digits for me

 

Just depends on what you’re running. I try and keep mine between 1100 and 1400. Right now with an 18 and 3.36 I’m about 1350 at 65. My new truck will have a 12 speed auto and 2.79 rears and I’ll be at 1325 at 70mph. I know guys in the 9’s that have gone with lower h.p. engines because as long as you stay in the torque they’re getting by with less h.p. but I’m not brave enough to try that. So I’m sticking with 510/1850.

 

Just barely