Help with Gearing! - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 24 Old 05-31-2012, 10:16 PM Thread Starter
Powerstroke.org Rookie
 
powerstroke619's Avatar
 
Join Date: Apr 2009
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Exclamation Help with Gearing!

I have a 2005 6.0L crew cab short bed and I recently added larger rims and tires. The truck got real sluggish and my MPG is at 10. I'm assuming the fix will need to come via gears, if the stock gears on my truck are 3.73's my guess would be to add 4.10's for the new set up.

The new tires I'm running are 325/60/18, are 4.10's the right choice?
powerstroke619 is offline  
post #2 of 24 Old 05-31-2012, 11:19 PM
Making ported intakes

 
ODAWG714's Avatar
 
Join Date: Dec 2010
Location: Anaheim, Ca
Posts: 1,757
Thanks: 124
Thanked 79 Times in 70 Posts
Mentioned: 1 Post(s)
Quoted: 6 Post(s)
Feedback Score: 2 reviews
I'm running 4.30s and love em. You down in sd? If your near Anaheim you can try my truck with the 4.30s

And I believe the 325.60 is like a 36in tire I have two n my garage.

Oliver
6.0/6.4 Ported intake manifolds, turbos, air intakes, fuel systems and much much more!!!!
ODAWGS DIESEL PERFORMANCE
ODAWG714 is offline  
post #3 of 24 Old 06-01-2012, 06:26 AM
Compression Ignition Addict
 
Dirty_Stroke's Avatar
 
Join Date: Jul 2011
Location: Tuscaloosa, Al
Posts: 1,398
Thanks: 2
Thanked 17 Times in 14 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I've wondered how 4.30's would do with a 35/36 inch tire. I have pondered the idea of putting them in my truck to get some mileage back. I didn't know if it would hurt or help mpg, I know it'd be a lot stronger down low.



05 F250 FX4 Lariat, SCT Livewire, 155cc injectors, Gryphon FICM tuner, ARP studs, MTW Stage 2 Turbo, Riff Raff boots, Warren Built trans, PMF traction bars ,4 inch straight pipe, Sinister EGR delete, S&B CAI, N-fab bars, level kit, 5% limo tint, 35 Toyos and 20s, Recon smoked everything, Harley headlights, 5k HID's, Camlocker toolbox, lots more
Dirty_Stroke is offline  
post #4 of 24 Old 06-01-2012, 06:36 AM
Slacker



 
Evil Eye's Avatar
 
Join Date: Dec 2006
Location: Surprise, Arizona
Posts: 18,573
Thanks: 16
Thanked 222 Times in 193 Posts
Mentioned: 19 Post(s)
Quoted: 157 Post(s)
Feedback Score: 4 reviews
Quote:
Originally Posted by ODAWG714 View Post
I'm running 4.30s and love em. You down in sd? If your near Anaheim you can try my truck with the 4.30s

And I believe the 325.60 is like a 36in tire I have two n my garage.
The 325/60/R18 is a 33" tire and is about 13" wide. You are probably thinking about the 326/65/R18, which is roughly a 35x12.5 tire. I used to run the 325/60's and have switched to the 305/55/R20 which is roughly the same dimensions but a touch more narrow (33x12). I'm also running 3.73 gears, but the cost to change them out is roughly $1k in new gears for front and rear and the master install kits, PLUS another $1k in labor to have them installed.

Since I tow, I am considering going to the 4.30's to help regain some of my mileage as well as gain some mechanical advantage pulling some of the steep grades with my toy hauler. Otherwise, I would be going the route with the 4.10's...

PS. It's going to take some serious fuel mileage increases to get your return on a $2k investment...

Shawn Carlson
EvilEye@powerstroke.org

Proud Navy Vet
2005 F250, CCSB, 6.0 PSD, FX4 (The Sweet Unit is white)
2008 F350, CCLB, 6.4 PSD (Brad-the wife's truck is black)




Engine Mods:
Fluidampr
CCV Reroute (Reinstated)
4" MBRP Exhaust
MTW Stage 1 Turbo
Bulletproof 53V FICM
BulletProof EGR Cooler
BulletProof Water Pump
Riff Raff Intercooler Boots
Gogo Diesel Direct Drive Solenoid
BulletProof All-Aluminum Radiator
BulletProof All-Aluminum Intercooler
BulletProof Oil Cooler System w/ Bypass Filter
SCT w/ Custom Tunes (TSD, DJ's, Innovative, Gearhead, QuickTricks)

Exterior Mods:
Bilstein 5100 Shocks
Icon Adjustable Trac Bar
Firestone RideRite Air Bags
BDS Dual Steering Stabilizer
Aluminum Finned Differential Cover
Reese 16k Manual Slider 5th Wheel Hitch
Icon 2.5" Leveling Kit w/ F-350 rear blocks
20" BMF Novakanes wrapped in 33" Nitto Terra Grapplers
Evil Eye is offline  
post #5 of 24 Old 06-01-2012, 06:45 AM
Compression Ignition Addict
 
ebusa's Avatar
 
Join Date: Aug 2006
Location: Washington
Posts: 637
Thanks: 2
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by powerstroke619 View Post
I have a 2005 6.0L crew cab short bed and I recently added larger rims and tires. The truck got real sluggish and my MPG is at 10. I'm assuming the fix will need to come via gears, if the stock gears on my truck are 3.73's my guess would be to add 4.10's for the new set up.

The new tires I'm running are 325/60/18, are 4.10's the right choice?
Do you have an sct tuner? If not, you may consider it with some good mild tunes tow or street Much cheaper than gears. It won't be sluggish anymore

-Evan

Semper Fi

2005 F350 Crew Cab LB FX4 Lariat
Loaded-Leather, Sunroof, 06 Chrome Package
5'' Tuff Country Lift
Toyo MT's 35's with Race Line Renegade 20's
ARP Studs, EGR Cooler Delete, Coolant Filter
MBRP 4'' Exhaust Turbo back, No Cat
SCT X3 Tuned by TSD & IDP
Stock Airbox, NON-MAF Truck
GT3788VA POWERMAX Turbo
DiProcol Optix EGT & Boost Guages , Scangauge II

ebusa is offline  
post #6 of 24 Old 06-01-2012, 07:33 AM
BACKYARDIGAN


 
windrunner408's Avatar
 
Join Date: Feb 2010
Location: Swartz Creek, MI
Posts: 4,816
Thanks: 30
Thanked 132 Times in 92 Posts
Mentioned: 3 Post(s)
Quoted: 4 Post(s)
Feedback Score: 2 reviews
Quote:
Originally Posted by powerstroke619 View Post
I have a 2005 6.0L crew cab short bed and I recently added larger rims and tires. The truck got real sluggish and my MPG is at 10. I'm assuming the fix will need to come via gears, if the stock gears on my truck are 3.73's my guess would be to add 4.10's for the new set up.

The new tires I'm running are 325/60/18, are 4.10's the right choice?
4.10s are the right gears for those tires. It would actually be a little too much gear (kind of like 4.30s with 35s) but based on what is available it is the next size up and would be close enough. The thing to keep in mind though is I have yet to see/hear of anyone who regeared their truck and actually regained mileage back. You will most certainly gain low end torque and maybe some mileage if you only drove in the city but if you do any driving on the hwy I wouldnt think you would gain much if anything at all. I could be wrong. JMO.

Nate
2006 F350 (BACKYARDIGAN) - 67mm Turbo, 215/85 injectors, WPE intake manifold, NB/Warren Trans, and more stuff that I don't care to mention....
2006 F250 (LITTLE DURTY) - WPE Manifold, Up-pipes, EGR delete kit, and Tuned By ME
BULLET PROOF DIESEL 1-888-967-6653
KC TUROS - Not just a modified Powermax...

WINDRUNNER PERFORMANCE ENGINEERING
WWW.WPEDIESEL.COM

windrunner408 is offline  
post #7 of 24 Old 06-01-2012, 07:44 AM
Compression Ignition Addict
 
Dirty_Stroke's Avatar
 
Join Date: Jul 2011
Location: Tuscaloosa, Al
Posts: 1,398
Thanks: 2
Thanked 17 Times in 14 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by windrunner408 View Post
4.10s are the right gears for those tires. It would actually be a little too much gear (kind of like 4.30s with 35s) but based on what is available it is the next size up and would be close enough. The thing to keep in mind though is I have yet to see/hear of anyone who regeared their truck and actually regained mileage back. You will most certainly gain low end torque and maybe some mileage if you only drove in the city but if you do any driving on the hwy I wouldnt think you would gain much if anything at all. I could be wrong. JMO.
Yea I was thinking 4.30 might be too much gear on the highway for a diesel on 35's. I have 4.10's in my Rubicon on 35's and it's kind of sluggish above 50mph, but I know it doesn't have near the torque lol. I ran 4.88's in my old CJ on 36's and it hold plenty of pep! But i was in 4th gear by 40mph.



05 F250 FX4 Lariat, SCT Livewire, 155cc injectors, Gryphon FICM tuner, ARP studs, MTW Stage 2 Turbo, Riff Raff boots, Warren Built trans, PMF traction bars ,4 inch straight pipe, Sinister EGR delete, S&B CAI, N-fab bars, level kit, 5% limo tint, 35 Toyos and 20s, Recon smoked everything, Harley headlights, 5k HID's, Camlocker toolbox, lots more
Dirty_Stroke is offline  
post #8 of 24 Old 06-01-2012, 07:47 AM
Making ported intakes

 
ODAWG714's Avatar
 
Join Date: Dec 2010
Location: Anaheim, Ca
Posts: 1,757
Thanks: 124
Thanked 79 Times in 70 Posts
Mentioned: 1 Post(s)
Quoted: 6 Post(s)
Feedback Score: 2 reviews
I just measured my 325.60r20 and they are 35.5 in and they are bigger then my 35's that I am running.

Oliver
6.0/6.4 Ported intake manifolds, turbos, air intakes, fuel systems and much much more!!!!
ODAWGS DIESEL PERFORMANCE
ODAWG714 is offline  
post #9 of 24 Old 06-01-2012, 08:01 AM Thread Starter
Powerstroke.org Rookie
 
powerstroke619's Avatar
 
Join Date: Apr 2009
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Yes I'm in San Diego...

I'm actually looking for a spare tire for an extra rim I have, let me know if you're interested in selling a tire or two.
powerstroke619 is offline  
post #10 of 24 Old 06-01-2012, 08:02 AM Thread Starter
Powerstroke.org Rookie
 
powerstroke619's Avatar
 
Join Date: Apr 2009
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by ODAWG714 View Post
I'm running 4.30s and love em. You down in sd? If your near Anaheim you can try my truck with the 4.30s

And I believe the 325.60 is like a 36in tire I have two n my garage.
Yes I'm in San Diego...

I'm actually looking for a spare tire for an extra rim I have, let me know if you're interested in selling a tire or two.
powerstroke619 is offline  
Reply

Tags
3.73 , 4.10 , gearing , gears

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome