Well I cant say for sure about the Ram because I never took my truck up to top speed before and after the gear swap and I dont plan on it either. BUT if you look at racing in general, the cars/trucks drag racing usually run the (numerically) higher gears because they improve accelleration, while cars/trucks setup for consistant high speed courses will have a (numerically) lower gear ratio because they want to gt the fastest laps in. Granite all of this depends on alot of things specially the hp/tq that the vehicle has as well, but in general thats how it goes....

With the risk of sounding like a certain member of this site, it would be interesting to line two identical trucks up and have the only thing different being the gearing and have them floor it down a flat open 2-3mile course and see what happens. Thinking it through I would bet the first half of the race would go to the one with the (numerically) higher gear as it should accellerate faster and get up to speed much faster than the other one however it should also level out sooner, while the other truck with the (numerically) lower gear on the other hand should be able to hit a higher mph and catch the first truck in the second half of the race.

 

I would agree with that totally except that they both hit the top speed limiter unless there's a programmer involved. My 3.92s propel my pickup to that mark damn fast

 

[quote=Ridinhigh;1457262]your telling me you hit 160 mph were you at a landing strip to get to that speed and why dont you just do the math first before you post[/quot.

 

[
quote=red06RAM;1457270]You mean 160 KM's? Speedo only goes to 120 MPH.[/quote
No 160 mph the Edge Evolution removes your speed limiter and had a didgital read out of mph.

 

Ya, I live in Salt Lake City ut. home of the Boniville Salt Flats. wide open and flat.

 

i plan on getting these gears soon as well..and i think the guys here are saying around 70 mph you probably wouldnt be going as fast as would be with stock gears.......

 

that still doesn't explain how u got the power to do 160 mph.

 

I am willing to bet that around 70 mph with stock gears is going to be around 70 mph with new gears! LOL

Your rpms will be about 200-300 higher with 4:56 gears and stock size tires!

Mine is only about 2000@ 70 mph!

 

lol woops your right that is worded wrong but ....i guess that is what i was trying to get at dam**

 

When I went from 3.55 gears to 4.56's I only gained 300RPMs@60MPH... (three hundred RPM's)

Keep in mind that 4.56 gears add TORQUE to every gear in the transmission not just 1st gear. When your going over 100+MPH there is alot of wind resistance which the 3.55 gears will NOT be able to overcome ...

theoretically the 3.55's should be good up to 180MPH+... but in reality they lack the needed torque to get you there... so they top out at approximately 120-125MPH... With the .67 over drive they effectively become a 2.37 gear....

The 4.56's theoretically should be able to take you to 160MPH+... And they do a decent job of it... I think if I had more Realistate I could have taken it a bit further. I stopped at approximately 148MPH. With the .75 overdrive they effectively become a 3.42 OGR gear.... With the .67 over drive they effectively become a 3.05 OGR gear....

My point is... In overdrive... You do NOT lose ANY top end what so ever... even with 4.56 gears.

SPEED SAFE, AIR RAM