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post #1 of 59 Old 10-27-2008, 07:30 AM Thread Starter
onlyn8v
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The Gear /Tire/ speed /MPG thread

This is inspired by the Tshadow thread "Did I waste $1200"

Basically what I would like to do is make a thread that someone could reference for "what would be my revs/MPG be with XX gears?"

If we could Id like to see if we could keep it in a format like:

>Engine
>Tranny
>Gears
>Tire size
>Cruising speed
>Revs while cruising
>Aprox. MPG


I get:

>4.0
>42RLE auto
>3.73
>33x12.50
>70-75
>14-15 MPG


I think that if we could keep it up it would be a big help

Thanks!


Dave

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Last edited by onlyn8v; 10-27-2008 at 10:59 AM.
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post #2 of 59 Old 10-27-2008, 07:54 AM
wrangler2007
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This thread is going to be a sticky!

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post #3 of 59 Old 10-27-2008, 08:19 AM
Unlimited04
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Location: Colorado
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Gear ratio calculators:
http://www.4lo.com/calc/gearratio.htm
http://www.et-studios.com/motorsports/gears/gears.html

Gear ratios:

42RLE 4-speed automatic (2003-2006)


First 2.84 : 1
Second 1.57 : 1
Third 1.00 : 1
Overdrive 0.69 : 1
Reverse 2.21 : 1

NSG-370 6-speed (05-06)
First 4.46 : 1
Second 2.61:1
Third 1.72:1
Fourth 1.25:1
Fifth 1.00:1
Sixth 0.84:1
Reverse 4.06:1

NV3550 5-speed (2000-2004)
First 4.01:1
Second 2.33:1
Third 1.39:1
Fourth 1.00:1
Fifth 0.78:1
Reverse 3.57:1

As for me:
>Engine - 4.0L Inline 6
>Tranny - 42RLE
>Gears - 3.73
>Tire size - 31x10.5
>Cruising speed - 60-75mph
>Aprox. MPG - 18-19mpg @ 60mph, 15-16mpg @ 75mph, city: 12-14mpg


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Last edited by Unlimited04; 10-27-2008 at 08:37 AM.
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post #4 of 59 Old 10-27-2008, 08:33 AM
wenkebach
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Join Date: Nov 2005
Location: Baton Rouge, LA
Posts: 620
Engine - 4.0L Inline 6
Tranny - NSG370 6 speed
Gears - 3.73
Tire size - 33x12.5 Cooper STT's
Cruising speed - 60-75mph
RPM - 2100
Aprox. MPG - 11-12 mpg city, 14-15 mpg highway

2005 Wrangler Sport - 4.0L 6 speed
Rusty's 3" Lift, 33x12.5 Trxus MT's, JKS 1.25" BL, JKS BMML, Jeeperman Skidz
Jeeperman Bumper/Pre-runner Bar, Warn Winch, Front Aussie Locker

Last edited by wenkebach; 10-27-2008 at 08:26 PM.
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post #5 of 59 Old 10-27-2008, 08:38 AM
sixshooter05
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2005 TJ Wrangler 
 
Join Date: Apr 2005
Location: Bennington, NY
Posts: 63
Engine - 4.0L I6
Tranny - NSG370
Gears - 3.07
Tire Size - P265/75R15
Cruising speed - 60-70 mph
Aprox. MPG - 17-19 mpg

Blue Jeep Club #145
2005 Wrangler X Patriot Blue 4.0L 6 speed
RC 2.5 lift w/ 3/4" front spacers, 2.2 shocks & steering stabilizer. JKS disco's
3.07 gears 31x10.5x15LT Firestone Destination AT
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post #6 of 59 Old 10-27-2008, 09:44 AM
2jhanna
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2002 TJ Wrangler 
 
Join Date: Jun 2007
Location: Denton County, TX
Posts: 7,641
Engine - 4.0L I6
Tranny - NV3550 5 spd
Gears - 3.73
Tires - 30x9.5x15
Cruising Speed - 60-70 mpg
Approx MPG - 16-17 city, 19-20 hiway

Other notes, 2002 sport, 118,000 miles, completely stock, soft top, hard doors, d44 open rear, 3rd vehicle, speedo approx 1.5% off.

jhanna
denton county, tx
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post #7 of 59 Old 10-27-2008, 10:04 AM
BlazinJack
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2006 TJ Wrangler 
 
Join Date: Oct 2008
Location: Denver
Posts: 592
Engine = 4.0l
Tranny = NSG 370*
Gears = 4.10
Tires = 33x12.50 Mud terrains
Cruising speed = 70-80 (I speed!)
Approx MPG = 10-12 city 13-14 highway
Speedo never corrected after lift so MPG #'s are probably low
* after looking at the specs for this tranny im confused. Jeep told me twice that this is a double overdrive tranny, WTF?
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post #8 of 59 Old 10-27-2008, 10:59 AM Thread Starter
onlyn8v
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Can we also ad rev when cruising PLEASE

Dave

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post #9 of 59 Old 10-27-2008, 01:00 PM
jchappy
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2011 JK Wrangler 
 
Join Date: Jun 2008
Location: San Diego
Posts: 177
>Engine 4.0
>Tranny 3 spd auto
>Gears 4.56
>Tire size 33x12.5 BFG's
>Cruising speed 55-60
>Revs while cruising 25-2800
>Aprox. MPG 12.5

MY NEW JEEP- 2011 JEEP JKUR, Body Armor front bumper, Warn XD9000I winch, Synthetic winch line,XRC Rear Bumper W/Tire carrier, OBA W/1Gal Tank, Terafex 2.5in spring lift, Bilstein 5100 shocks,GY 315/70R17 Duratracs, 4.88 G2 gears, Cobra 75 CB

MY OLD JEEP-1999 Wrangler Sport 4.0L, 4" Pro Comp Lift, 33" BFG's, 8K winch, SYE, Viking soft top, onboard CO2 and all the recovery straps and equipment
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post #10 of 59 Old 10-27-2008, 01:27 PM
Moses2564
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Location: Fort Drum
Posts: 804
>Engine 4.0
>Tranny AX-15
>Gears 4.56
>Tire size 33x12.5 BFG's
>Cruising speed 65-75
>Revs while cruising 2800-3200
>Aprox. MPG 15-16 Hwy.

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post #11 of 59 Old 10-27-2008, 01:52 PM
greentea
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Join Date: Aug 2008
Location: Ontario, Canada
Posts: 76
Engine = 4.0L
Tranny = NSG 370*
Gears = 3.73
Tires = P225/75R15 GoodYear GS-A
Cruising speed = 60-65
Revs = 2300-2500
Approx MPG = 15-16 city 19-20 highway
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post #12 of 59 Old 10-27-2008, 02:11 PM
rdixon89
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Join Date: Apr 2008
Location: Pasadena, Maryland
Posts: 26
>Engine- 4.0L
>Tranny-5speed
>Gears-3.07
>Tire size-31x10.5x15
>Cruising speed-65-70
>Revs while cruising-1900-2050
>Aprox. MPG - City= 15-17 Highway=18-21

I only get 21 if i do 60, and it's only been once, but i never got my speedo corrected so i do slightly better then these numbers.
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post #13 of 59 Old 10-27-2008, 03:27 PM
TimBrown
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Join Date: Jul 2007
Location: Nashville
Posts: 264
>Engine- 4.0L
>Tranny- NV3550 5 spd Manuel
>Gears-4.56
>Tire size-31x9.5x16
>Cruising speed-70-75
>Revs while cruising-3000 - 3250
>Aprox. MPG - City= 12-13 Highway=13-14
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post #14 of 59 Old 10-27-2008, 05:44 PM
jbramble24
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Join Date: Nov 2007
Location: Prescott Valley, Arizona
Posts: 977
Engine- 4.0L
Tranny- NSG370 6 spd Manual
Gears-3.73
Tire size-33x12.5x15 (Measure about 32")
Cruising speed-65-70
Cruising RPM-2500
Average MPG - 17 MPG
Speedo Corrected with 31 tooth speedo gear

GM 350 Powered 1984 CJ-7

Last edited by jbramble24; 10-31-2008 at 11:49 AM. Reason: Added Speedo Gear Info
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post #15 of 59 Old 10-27-2008, 08:28 PM
wenkebach
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Quote:
Originally Posted by jbramble24 View Post
Engine- 4.0L
Tranny- NSG370 6 spd Manual
Gears-3.73
Tire size-33x12.5x15 (Measure about 32")
Cruising speed-65-70
Cruising RPM-2500
Average MPG - 17 MPG
How in the world do you get 17 MPG? I have about the same setup and I only get 11...and it's flat where I live.

2005 Wrangler Sport - 4.0L 6 speed
Rusty's 3" Lift, 33x12.5 Trxus MT's, JKS 1.25" BL, JKS BMML, Jeeperman Skidz
Jeeperman Bumper/Pre-runner Bar, Warn Winch, Front Aussie Locker
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