gears???
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Mountain Pass
Joined: Nov 2006
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From: marrero, la.
gears???
how do you know what gears a in truck? does it say somewhere? because someone said it would affect gas mileage. i have 04 f350 6.0 cc drw fx4 all stock and i want better gas mileage - 12.4 mpg city. i dont tow anything as of now.
Post Fiend
Joined: Sep 2006
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From: bricktown NJ
Im Not The Gear Expert Here But My Trucks Have 4.30 Rears Gas, Diesel For Towing, Hauling ,plowing, Weight.it Seams To Me That The Higher The Gear ,the Lower Mpg You Are Going To Get.but For Me In The Long End It Pays. Yes 4.10 4.30 4.88 Are For Towing Tow Boss Pkg More Rear Power.
Post Fiend
Joined: Sep 2006
Posts: 6,634
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From: bricktown NJ
Im Not The Gear Expert Here But My Trucks Have 4.30 Rears Gas, Diesel For Towing, Hauling ,plowing, Weight.it Seams To Me That The Higher The Gear ,the Lower Mpg You Are Going To Get.but For Me In The Long End It Pays. Yes 4.10 4.30 4.88 Are For Towing Tow Boss Pkg More Rear Power.
Freshman User
Joined: Jan 2007
Posts: 33
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Originally Posted by B1GKAHUNA
how do you know what gears a in truck? does it say somewhere? because someone said it would affect gas mileage. i have 04 f350 6.0 cc drw fx4 all stock and i want better gas mileage - 12.4 mpg city. i dont tow anything as of now.
sfd512
Senior User
Joined: Sep 2006
Posts: 253
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From: Santee, CA
SFD is correct about the gearing. The higher the number, the lower the ratio. That means the higher numbers (like 4.10 and 4.30) are more towing/power, while the lower numbers (like 3.73) are higher speed and mpg. You can also look at the label on your driver door post. You will see and Axle Code. Below are the definitions (LS = Limited Slip). I have 3.73 and have no complaints on power (the PSD has plenty extra) and I get 15-17mpg commuting, 19+ solo freeway, and 13+ towing. Hope this all helps.
AXLE CODES:
37- 3.73
3L- 3.73 LS
41- 4.10
4N- 4.10 LS
43- 4.30
4L- 4.30 LS
48- 4.88
8L- 4.88 LS
53- 5.38
5L- 5.38 LS
AXLE CODES:
37- 3.73
3L- 3.73 LS
41- 4.10
4N- 4.10 LS
43- 4.30
4L- 4.30 LS
48- 4.88
8L- 4.88 LS
53- 5.38
5L- 5.38 LS
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From: Stephensville WI
Originally Posted by B1GKAHUNA
how do you know what gears a in truck? does it say somewhere? because someone said it would affect gas mileage. i have 04 f350 6.0 cc drw fx4 all stock and i want better gas mileage - 12.4 mpg city. i dont tow anything as of now.
Before you try something drastic, modify how you drive. A lot of PSD guys report mileage gains by not driving over 2000 RPM.
Freshman User
Joined: Jan 2007
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Originally Posted by redford
12.4 in the city isn't bad.
Before you try something drastic, modify how you drive. A lot of PSD guys report mileage gains by not driving over 2000 RPM.
Before you try something drastic, modify how you drive. A lot of PSD guys report mileage gains by not driving over 2000 RPM.
sfd512
Elder User
Joined: Sep 2006
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From: Lincoln, NE
http://community.webshots.com/user/TwelveAlpha
I'm starting to like free picture hosting. Look at the Dana Album. Its CAD printouts that show the axle tags and codes . . . from Dana.
I'm starting to like free picture hosting. Look at the Dana Album. Its CAD printouts that show the axle tags and codes . . . from Dana.
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