4:10 gears...

[Dmitri]

i bought a 97 f359 powerstroke diesel.......and i have a feeling it has 4:10 gears, is there a way of getting little bit lower gear to get a better fuel milege in the highway.......it rev just over 2000rpm at 100km\h.it just feels like it doesnt want to go past a 100km\h.....and engine is loud and seems like its under load, is it normal?

[Raul@Stealth Automotive]

Originally Posted by Dmitri

i bought a 97 f359 powerstroke diesel.......and i have a feeling it has 4:10 gears, is there a way of getting little bit lower gear to get a better fuel milege in the highway.......it rev just over 2000rpm at 100km\h.it just feels like it doesnt want to go past a 100km\h.....and engine is loud and seems like its under load, is it normal?

you mean you want higher gears... maybe to 3.73

now you could do that but its gonna take a while to come up with the diff its gonna cost to do it....

your looking at around 300-400 for gears depending if you need a master install kit or not and they usually charge 250-500 an axle to change gears....

so if you factor in the amount of money you will save by goign with 3.73 it will prob take you years to come up with your initial investment

-Raul

[Dmitri]

oh thanx

[97powerstroker]

solution is simple,just slow down a bit,ive heard 60-65 is a great mpg spot,even with 4.10s

[Dmitri]

ok thanx, the truck doesnt really want go much past 60mph anyways

i guess getting 3.55 gears is more then just taking it apart and rplacing the gear itself lol

[97powerstroker]

Originally Posted by Dmitri

ok thanx, the truck doesnt really want go much past 60mph anyways

i guess getting 3.55 gears is more then just taking it apart and rplacing the gear itself lol

if it doesnt want to go past 60 ,something is wrong,mine will pull past 85mph till it hits the limiter.state your truck,mods,tires,lift ect.so we can help,unless theres something im missing here

[Dallas4x4]

I have 4.10s in my truck. I get the best MPG at about 2000-2100 rpm. Anything more it drinks the fuel and anything less im not moving fast enough.

or you could get bigger tires. I have 33s

[GilroyRacing]

^^ I agree anything over 2,000rpms and my truck drinks fuel...