DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum

Go Back   DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum > Dodge Ram Forum - Mod Zone - Custom Dodge Ram Mods - Dodge Ram Performance > Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8


Notices

Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


Latest Vendor News
AutoAnything
Addictive Desert Designs!
Bayou Goat Mounts

Reply
 
Thread Tools
  #1  
Old 05-09-2014, 03:14 PM
nboake23 nboake23 is offline
Dodge Ram Forum Newcomer
 
Join Date: Apr 2013
Location: Alberta
Age: 24
Posts: 21
Gender: Male
Vehicle: 2013
Trim Level: Outdoorsman
Color: True Blue Pearlecent
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:10
nboake23 is on a distinguished road
Default Gear Information?

I'm fairly new to The truck scene and I keep seeing people talking about "gears" and swapping gears and such, and I honestly have no idea to which they are discussing. I'm wondering if anyone could give me a rundown of swapping gears or attach a link I could read so I understand what its all about?
Reply With Quote
Sponsored links
  #2  
Old 05-09-2014, 06:14 PM
cvieke's Avatar
cvieke cvieke is offline
Dodge Ram Forum Member
 
Join Date: Oct 2009
Location: IN
Age: 48
Posts: 65
Gender: Male
Vehicle: 2008 Ram
Trim Level: TRX
Color: Black
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 0
Rep:10
cvieke is on a distinguished road
Default

Referring to the ring and pinion gear(s). My factory rear end gear was 3:55, I have a 2wd, I am running 35" tires. With the factory rear end gear the truck was a little sluggish on take off, I swapped out the factory 3:55 and went to 4:56 gear. Helped take off a lot., only downside is worse gas mileage.
__________________
Volant CAI, Magnaflow muffler, 2" leveling, 3" body lift, Bushwacker fender flares, 4.56 gears
Reply With Quote
  #3  
Old 05-09-2014, 10:00 PM
nboake23 nboake23 is offline
Dodge Ram Forum Newcomer
 
Join Date: Apr 2013
Location: Alberta
Age: 24
Posts: 21
Gender: Male
Vehicle: 2013
Trim Level: Outdoorsman
Color: True Blue Pearlecent
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:10
nboake23 is on a distinguished road
Default

so is it recommended if I were to upgrade my tire size?
Reply With Quote
  #4  
Old 05-09-2014, 10:30 PM
cvieke's Avatar
cvieke cvieke is offline
Dodge Ram Forum Member
 
Join Date: Oct 2009
Location: IN
Age: 48
Posts: 65
Gender: Male
Vehicle: 2008 Ram
Trim Level: TRX
Color: Black
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 0
Rep:10
cvieke is on a distinguished road
Default

That all depends, I wanted better performance out of my truck with the larger tires. Performance wasn't bad. I just wanted more. If you go to larger tires, see what you think first. It took me about a year before I decided to swap out the gear. Is your truck 4 WD? If so it can get expensive since you will have to do the front end gears also. Also if you do much towing with larger tires, swamping out the gears woulld be helpfull.
__________________
Volant CAI, Magnaflow muffler, 2" leveling, 3" body lift, Bushwacker fender flares, 4.56 gears
Reply With Quote
  #5  
Old 05-09-2014, 11:30 PM
GTyankee's Avatar
GTyankee GTyankee is offline
Dodge Ram Forum Member

 
Join Date: Dec 2009
Location: San Diego East County, Ca
Posts: 18,514
Gender: Male
Vehicle: 2009 Dodge Ram 1500 2X4
Trim Level: quad cab SLT
Color: sunburst orange pearl
Rep Power: 19
Rep:2608
GTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond repute
Default

gearing can be confusing in many ways

on flat ground driving, say at 55 mph
your engine & transmission & therefore the drive shaft are all turning the same number of rotations.
If the engine is turning 1500 revolutions per minute, (RPM). so is the drive shaft & the shaft of the Pinion gear.
The other end of the Pinion Gear shaft has a geared head on it & it engages the Ring Gear


without going into a boring bunch of detail
The Ring Gear then rotates much slower then the drive shaft, because of its larger diameter
The Ring Gear basically make 4 smaller gears turn & they in turn cause the 2 axles that the wheels & tires are connected to rotate, the wheels & tires, although no one much thinks of them as gears, they definitely are smooth gears

This sort of explains it best



our trucks have several different gearing options
3.21 slow take off, great gas mileage
3.55 slightly faster take off, you maybe lose a bit of mileage per gallon, but you gain some power or torque
3.92 yet again faster take off, again more added torque, more loss in MPG
4.11 quicker take off, more torque yet again, gas mileage is starting to suck

Now if you go to taller rear tires, like from 32" to 35", no matter what option you have, you are changing your gear ratio even further

at some point your engine is turning 3,000 rpm or more to do the original 55 MPH

Have i confused you enough ??
__________________
Ram 1500 SLT Quad cab, 5.7 HEMI(R) MDS VCT, 5 speed auto 545RFE, 3.55 differential gears, 18" Magnaflow muffler, EGR bug deflector, Bushwacker fender flares, customized Nfab nerf bars, CB radio, Autonet wi-fi router, custom soft tonneau cover, Line_X bedliner, DEBO Step, build date 10/15/08 a Wednesday built vehicle
Reply With Quote
  #6  
Old 05-10-2014, 12:36 AM
nboake23 nboake23 is offline
Dodge Ram Forum Newcomer
 
Join Date: Apr 2013
Location: Alberta
Age: 24
Posts: 21
Gender: Male
Vehicle: 2013
Trim Level: Outdoorsman
Color: True Blue Pearlecent
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:10
nboake23 is on a distinguished road
Default

that's perfect thank you I can wrap my head around this easily enough
Reply With Quote
  #7  
Old 05-11-2014, 11:15 PM
chefred112's Avatar
chefred112 chefred112 is offline
Dodge Ram Forum Senior Member!
 
Join Date: Feb 2009
Location: NorCal
Posts: 5,783
Gender: Male
Vehicle: 2005 Dodge Ram
Trim Level: SLT
Color: white
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 9
Rep:650
chefred112 is a splendid one to beholdchefred112 is a splendid one to beholdchefred112 is a splendid one to beholdchefred112 is a splendid one to beholdchefred112 is a splendid one to beholdchefred112 is a splendid one to behold
Default

think of a 10 spreed bike...the lower the gear the more distance you get with each pedal rotation..great and economical on flat land or down hill...but once going up a grade you tend to change the gears to use less effort. same concept here..I use to run 4.56's on a 30" tall tire and loved it, could roast tires most easily
__________________
-fast freddie-
one quick 05 hemi qc...with over 250k miles on odo... on the 5.7...stoker 6.4 now, new times coming
performance mods: yes 5.7 e.t.'s: 1/8 - 7.85 @ 93.20, 1/4 - 12.10 @ 113.96
2005 Dodge Ram 1500 QC SLT: 12.107 @ 113.960 MPH
Reply With Quote
  #8  
Old 05-12-2014, 01:40 PM
HemiLonestar's Avatar
HemiLonestar HemiLonestar is offline
Dodge Ram Forum Senior Member!
 
Join Date: Nov 2009
Location: MD
Age: 41
Posts: 2,074
Gender: Male
Vehicle: 2003 Dodge Ram 1500 QC
Trim Level: SLT Lonestar Edition
Color: Flame Red
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 6
Rep:257
HemiLonestar is a jewel in the roughHemiLonestar is a jewel in the roughHemiLonestar is a jewel in the rough
Send a message via AIM to HemiLonestar Send a message via MSN to HemiLonestar Send a message via Yahoo to HemiLonestar
Default

All about the mechanical advantage, makes it easier to get that big hunk of metal moving.
__________________

"Big Red"
2003 Ram 1500 QC Hemi Lonestar Edition (Mods list in profile)
2006 Charger R/T
Sarcasm - it beats killing people
Reply With Quote
  #9  
Old 05-12-2014, 01:58 PM
dodge man's Avatar
dodge man dodge man is offline
Dodge Ram Forum Senior Member!
 
Join Date: Apr 2010
Location: Macomb, Illinois
Age: 52
Posts: 735
Gender: Male
Vehicle: 2004 Quad Cab diesel
Trim Level: SLT
Color: Silver
Engine: 2005-20?? 359ci (5.9L) Cummins ISB 610 24-Valve Diesel I6 325hp 610 lb/ft
Rep Power: 5
Rep:217
dodge man has a spectacular aura aboutdodge man has a spectacular aura aboutdodge man has a spectacular aura about
Default

One small correction, with an overdrive in the transmission in top gear the engine and the driveshaft are not turning the same speed, the engine is turning slower. Before overdrives became problem 4th gear in a stick and 3rd gear in an automatic was a 1:1 ratio so they would have been turning the same speed.
__________________
2004 3/4 ton Quad Cab, 24 valve 5.9 Cummins
Reply With Quote
  #10  
Old 05-24-2014, 08:02 PM
moparmike07's Avatar
moparmike07 moparmike07 is offline
Dodge Ram Forum Senior Member!
 
Join Date: Mar 2010
Location: NY
Age: 25
Posts: 2,489
Gender: Male
Vehicle: 07 dodge ram 1500
Trim Level: st
Color: silver
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 0
Rep:68
moparmike07 will become famous soon enough
Default

moes performance 4.56 gears for 4x4 u need front and rear and timkin
__________________

2007 dodge ram 1500 quad cab 4x4 5 percent tint all around 35 percent windshield, ported tb, diablo sport, arh headers, magnaflow dual exhaust, magnaflow y pipe, krc210x cam,nitrous,CNC ported head. 4.56 motive
Reply With Quote
Reply

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Advertisement






All times are GMT -4. The time now is 03:14 AM.


= Copyright RamForumZ.com a Gigathreads.com Network Site =Ad Management by RedTyger
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
vB.Sponsors


=Gigathreads Network=
CLUBS MOPAR NATION DSM GPMM MAMM JAM
DIESEL Diesel Forum      
CHEVY Chevy Camaro Forum Chevy Volt Forum    
CHRYSLER Chrysler 300C Forum      
DODGE Dodge Avenger Forum Dodge Caliber Forum Dodge Challenger Forum Dodge Charger Forum
  Dodge Circuit Forum Dodge Hornet Forum Dodge Magnum Forum Dodge Nitro Forum
  Dodge Ram Forum Dodge Dakota Forum Dodge Durango Forum Dodge Dart Forum
FORD Ford Raptor Forum Ford F150 Forum Ford F100 Forum  
JEEP Jeep Forum      
PONTIAC Pontiac G8 Forum      
SRT SRT Viper Forum SRT Cuda Forum