Found a truck but have a question

abe568 · 11-04-2009, 01:13 PM

I found a truck that has an automatic trans and 4.10 rear end? I was wondering if that gear ratio will really kill my MPG? I also was wondering if i were to put a bigger tire on it would the bigger tire cancel out the gear ratio and give me a better MPG reading.

__________________
Hopefully a 3rd or 2nd generation cummins! Extended cab, shortbox

CoalRoller · 11-04-2009, 01:45 PM

4.10's will definitely lower your fuel mileage (I can't say how much) and going to a taller tire would compensate for the low gear ratio, but the big tires are going to be heavier than stock so if they did help the MPG I wouldn't imagine it would be much. Also a wider tire gives you less MPG.

Another thing to think about is the suspension. Bigger tires on the front puts more stress on your ball joints, tie rod ends wheel bearings, etc...

__________________
2002 6-speed, 5 inch straight pipe, Icebox, Edge Comp/Smarty. Isspro pyrometer, mechanical boost guage & electric fuel pressure gauge. FASS 95, Valair kevlar/ceramic clutch...

macattack_ga · 11-04-2009, 02:48 PM

How are you going to use the truck?

__________________
1997 3500 ExCab 4x4 Auto 3.55 (KDP Tabbed, EGT & Tranny Gauged, Fuel filter "PrimeLoc"ed, oil Amsoil Dual By-passed) 3 switch WVO setup (tank/filter/tank), PCS Boxed
1981 BJ42 (Full Alum Tub, 3B, H42, split case, 4.11 open)

abe568 · 11-04-2009, 02:49 PM

the truck will be my daily driver with probably pulling once or twice a month.

__________________
Hopefully a 3rd or 2nd generation cummins! Extended cab, shortbox

***Dreadnaught*** · 11-04-2009, 03:14 PM

i get around 18mpg on the freeway with 4.10's and 315 70r17's. thats only going 65. towing a 20ft flatbed with 4 quads on it, i get around 15mpg. going 60-65 mph.

empty going 70-75 i get around 16mpg. that couple mph extra may get you there faster, but its actually what kills your mpg.

__________________
2004.5 Dodge Ram 3500 4x4 4 door, Short bed, Auto, 315X70 R17 Hankook RF10's, Recon Cab lights.
Silencer MIA, S&B CAI, 5" Expandit TBE, DiPricol (EGT, Boost, Pyro), Edge J/A
Early 2000 Ford F-350 Reg Cab Lb Dually 2006 Headlights and Grille

AFE Stage 2 intake, DP Tuner (20, 40, 80, 140), Custom exhaust, ITP Over Boost Annihilator, Derale Atomic Trans Cooler, 5" turnout stacks

abe568 · 11-04-2009, 03:20 PM

hmm..ok. as long as i get somewhere between 16-20 mpg i would be happy. I need something that gets good fuel mileage for being a truck lol. I need a truck but a bigger part in my decision making is which setup would get me better mpg. I will eventually be putting bigger tires on the rig like a 285 or 305 tire so maybe the 4.10s would be better for me.

__________________
Hopefully a 3rd or 2nd generation cummins! Extended cab, shortbox

***Dreadnaught*** · 11-04-2009, 03:29 PM

what are you planning on pulling? how much weight are we talking?

__________________
2004.5 Dodge Ram 3500 4x4 4 door, Short bed, Auto, 315X70 R17 Hankook RF10's, Recon Cab lights.
Silencer MIA, S&B CAI, 5" Expandit TBE, DiPricol (EGT, Boost, Pyro), Edge J/A
Early 2000 Ford F-350 Reg Cab Lb Dually 2006 Headlights and Grille

AFE Stage 2 intake, DP Tuner (20, 40, 80, 140), Custom exhaust, ITP Over Boost Annihilator, Derale Atomic Trans Cooler, 5" turnout stacks

abe568 · 11-04-2009, 03:45 PM

farm equipment, combine heads, hay racks, skid steers, etc.

__________________
Hopefully a 3rd or 2nd generation cummins! Extended cab, shortbox

***Dreadnaught*** · 11-04-2009, 03:54 PM

if its not long distance stuff, maybe look into swapping 3.73's in later on down the road. it won't hurt your mileage too bad while towing, and it will help when the truck is empty.

__________________
2004.5 Dodge Ram 3500 4x4 4 door, Short bed, Auto, 315X70 R17 Hankook RF10's, Recon Cab lights.
Silencer MIA, S&B CAI, 5" Expandit TBE, DiPricol (EGT, Boost, Pyro), Edge J/A
Early 2000 Ford F-350 Reg Cab Lb Dually 2006 Headlights and Grille

AFE Stage 2 intake, DP Tuner (20, 40, 80, 140), Custom exhaust, ITP Over Boost Annihilator, Derale Atomic Trans Cooler, 5" turnout stacks

abe568 · 11-04-2009, 05:53 PM

well i dont want to buy a truck that im going to have to swap out the gears in right away. There are two trucks im stuck between. both 2002 2500s auto extended cabs, this one is green with a short bed leather interior for 13995 with 155k miles. The other one is a gray one long bed with 165k miles for 12995. Im not sure on the gray ones gear ratio though.

__________________
Hopefully a 3rd or 2nd generation cummins! Extended cab, shortbox

little red cummins · 11-04-2009, 06:08 PM

haha i got my truck with 3.55s and 265s ....then i went to a 285 tire.....now im at 315s and i do tow 4-5days a week and gross between 25-30k and im swappin 4.10s in it here soon.

so if yer thinkin of goin to a 33'' tire. id stick with the 4.10s if yer gunna tow

__________________
2002 2500 4x4 6spd. 3rd Gen. Recon Cab Lights. SB single disk. HOT edge J/A. FASS 150. BHAF and Outer Wear. Silencer ring MIA. 6'' aussies. leveled. 315 procomp m/t. B&W Gooseneck Hitch. Cobra 29 w/ dual 4ft Firesticks. Cumstom Front Bumper. Soon to have 4.10s

***Dreadnaught*** · 11-04-2009, 11:00 PM

go with the long bed. i have a short bed and am constantly wishing i had a long bed.

__________________
2004.5 Dodge Ram 3500 4x4 4 door, Short bed, Auto, 315X70 R17 Hankook RF10's, Recon Cab lights.
Silencer MIA, S&B CAI, 5" Expandit TBE, DiPricol (EGT, Boost, Pyro), Edge J/A
Early 2000 Ford F-350 Reg Cab Lb Dually 2006 Headlights and Grille

AFE Stage 2 intake, DP Tuner (20, 40, 80, 140), Custom exhaust, ITP Over Boost Annihilator, Derale Atomic Trans Cooler, 5" turnout stacks

11-04-2009, 01:13 PM	#1 (permalink)
abe568 Cummins Nut Join Date: Mar 2008 Location: Rockford, Illinois Posts: 364 Thanks: 0 Thanked 1 Time in 1 Post abe568's Truck Pics	Found a truck but have a question I found a truck that has an automatic trans and 4.10 rear end? I was wondering if that gear ratio will really kill my MPG? I also was wondering if i were to put a bigger tire on it would the bigger tire cancel out the gear ratio and give me a better MPG reading. __________________ Hopefully a 3rd or 2nd generation cummins! Extended cab, shortbox

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11-04-2009, 01:45 PM	#2 (permalink)
CoalRoller Cummins Nut Join Date: Aug 2007 Location: Ector, Texas Posts: 404 Thanks: 15 Thanked 24 Times in 24 Posts CoalRoller's Truck Pics	4.10's will definitely lower your fuel mileage (I can't say how much) and going to a taller tire would compensate for the low gear ratio, but the big tires are going to be heavier than stock so if they did help the MPG I wouldn't imagine it would be much. Also a wider tire gives you less MPG. Another thing to think about is the suspension. Bigger tires on the front puts more stress on your ball joints, tie rod ends wheel bearings, etc... __________________ 2002 6-speed, 5 inch straight pipe, Icebox, Edge Comp/Smarty. Isspro pyrometer, mechanical boost guage & electric fuel pressure gauge. FASS 95, Valair kevlar/ceramic clutch...

11-04-2009, 02:48 PM	#3 (permalink)
macattack_ga Cummins Fan Join Date: Dec 2006 Location: Arlington, VA Posts: 43 Thanks: 3 Thanked 4 Times in 3 Posts macattack_ga's Truck Pics	How are you going to use the truck? __________________ 1997 3500 ExCab 4x4 Auto 3.55 (KDP Tabbed, EGT & Tranny Gauged, Fuel filter "PrimeLoc"ed, oil Amsoil Dual By-passed) 3 switch WVO setup (tank/filter/tank), PCS Boxed 1981 BJ42 (Full Alum Tub, 3B, H42, split case, 4.11 open)

11-04-2009, 02:49 PM	#4 (permalink)
abe568 Cummins Nut Join Date: Mar 2008 Location: Rockford, Illinois Posts: 364 Thanks: 0 Thanked 1 Time in 1 Post abe568's Truck Pics	the truck will be my daily driver with probably pulling once or twice a month. __________________ Hopefully a 3rd or 2nd generation cummins! Extended cab, shortbox

11-04-2009, 03:14 PM	#5 (permalink)
*Dreadnaught* Poor Man Built Join Date: Oct 2008 Location: Pinckney, Mi Posts: 1,466 Thanks: 12 Thanked 22 Times in 17 Posts Dreadnaught's Truck Pics	i get around 18mpg on the freeway with 4.10's and 315 70r17's. thats only going 65. towing a 20ft flatbed with 4 quads on it, i get around 15mpg. going 60-65 mph. empty going 70-75 i get around 16mpg. that couple mph extra may get you there faster, but its actually what kills your mpg. __________________ 2004.5 Dodge Ram 3500 4x4 4 door, Short bed, Auto, 315X70 R17 Hankook RF10's, Recon Cab lights. Silencer MIA, S&B CAI, 5" Expandit TBE, DiPricol (EGT, Boost, Pyro), Edge J/A Early 2000 Ford F-350 Reg Cab Lb Dually 2006 Headlights and Grille AFE Stage 2 intake, DP Tuner (20, 40, 80, 140), Custom exhaust, ITP Over Boost Annihilator, Derale Atomic Trans Cooler, 5" turnout stacks

11-04-2009, 03:20 PM	#6 (permalink)
abe568 Cummins Nut Join Date: Mar 2008 Location: Rockford, Illinois Posts: 364 Thanks: 0 Thanked 1 Time in 1 Post abe568's Truck Pics	hmm..ok. as long as i get somewhere between 16-20 mpg i would be happy. I need something that gets good fuel mileage for being a truck lol. I need a truck but a bigger part in my decision making is which setup would get me better mpg. I will eventually be putting bigger tires on the rig like a 285 or 305 tire so maybe the 4.10s would be better for me. __________________ Hopefully a 3rd or 2nd generation cummins! Extended cab, shortbox

11-04-2009, 03:29 PM	#7 (permalink)
*Dreadnaught* Poor Man Built Join Date: Oct 2008 Location: Pinckney, Mi Posts: 1,466 Thanks: 12 Thanked 22 Times in 17 Posts Dreadnaught's Truck Pics	what are you planning on pulling? how much weight are we talking? __________________ 2004.5 Dodge Ram 3500 4x4 4 door, Short bed, Auto, 315X70 R17 Hankook RF10's, Recon Cab lights. Silencer MIA, S&B CAI, 5" Expandit TBE, DiPricol (EGT, Boost, Pyro), Edge J/A Early 2000 Ford F-350 Reg Cab Lb Dually 2006 Headlights and Grille AFE Stage 2 intake, DP Tuner (20, 40, 80, 140), Custom exhaust, ITP Over Boost Annihilator, Derale Atomic Trans Cooler, 5" turnout stacks

11-04-2009, 03:45 PM	#8 (permalink)
abe568 Cummins Nut Join Date: Mar 2008 Location: Rockford, Illinois Posts: 364 Thanks: 0 Thanked 1 Time in 1 Post abe568's Truck Pics	farm equipment, combine heads, hay racks, skid steers, etc. __________________ Hopefully a 3rd or 2nd generation cummins! Extended cab, shortbox

11-04-2009, 03:54 PM	#9 (permalink)
*Dreadnaught* Poor Man Built Join Date: Oct 2008 Location: Pinckney, Mi Posts: 1,466 Thanks: 12 Thanked 22 Times in 17 Posts Dreadnaught's Truck Pics	if its not long distance stuff, maybe look into swapping 3.73's in later on down the road. it won't hurt your mileage too bad while towing, and it will help when the truck is empty. __________________ 2004.5 Dodge Ram 3500 4x4 4 door, Short bed, Auto, 315X70 R17 Hankook RF10's, Recon Cab lights. Silencer MIA, S&B CAI, 5" Expandit TBE, DiPricol (EGT, Boost, Pyro), Edge J/A Early 2000 Ford F-350 Reg Cab Lb Dually 2006 Headlights and Grille AFE Stage 2 intake, DP Tuner (20, 40, 80, 140), Custom exhaust, ITP Over Boost Annihilator, Derale Atomic Trans Cooler, 5" turnout stacks

11-04-2009, 05:53 PM	#10 (permalink)
abe568 Cummins Nut Join Date: Mar 2008 Location: Rockford, Illinois Posts: 364 Thanks: 0 Thanked 1 Time in 1 Post abe568's Truck Pics	well i dont want to buy a truck that im going to have to swap out the gears in right away. There are two trucks im stuck between. both 2002 2500s auto extended cabs, this one is green with a short bed leather interior for 13995 with 155k miles. The other one is a gray one long bed with 165k miles for 12995. Im not sure on the gray ones gear ratio though. __________________ Hopefully a 3rd or 2nd generation cummins! Extended cab, shortbox

11-04-2009, 06:08 PM	#11 (permalink)
little red cummins Diesel Freak Join Date: Mar 2009 Location: apalachin, ny Posts: 888 Thanks: 3 Thanked 29 Times in 25 Posts little red cummins's Truck Pics	haha i got my truck with 3.55s and 265s ....then i went to a 285 tire.....now im at 315s and i do tow 4-5days a week and gross between 25-30k and im swappin 4.10s in it here soon. so if yer thinkin of goin to a 33'' tire. id stick with the 4.10s if yer gunna tow __________________ 2002 2500 4x4 6spd. 3rd Gen. Recon Cab Lights. SB single disk. HOT edge J/A. FASS 150. BHAF and Outer Wear. Silencer ring MIA. 6'' aussies. leveled. 315 procomp m/t. B&W Gooseneck Hitch. Cobra 29 w/ dual 4ft Firesticks. Cumstom Front Bumper. Soon to have 4.10s

11-04-2009, 11:00 PM	#12 (permalink)
*Dreadnaught* Poor Man Built Join Date: Oct 2008 Location: Pinckney, Mi Posts: 1,466 Thanks: 12 Thanked 22 Times in 17 Posts Dreadnaught's Truck Pics	go with the long bed. i have a short bed and am constantly wishing i had a long bed. __________________ 2004.5 Dodge Ram 3500 4x4 4 door, Short bed, Auto, 315X70 R17 Hankook RF10's, Recon Cab lights. Silencer MIA, S&B CAI, 5" Expandit TBE, DiPricol (EGT, Boost, Pyro), Edge J/A Early 2000 Ford F-350 Reg Cab Lb Dually 2006 Headlights and Grille AFE Stage 2 intake, DP Tuner (20, 40, 80, 140), Custom exhaust, ITP Over Boost Annihilator, Derale Atomic Trans Cooler, 5" turnout stacks