Which Gear Ratio would be better for 35s? 3.31 or 3.55 - Ford Powerstroke Diesel Forum
General 6.7 Discussion General 6.7 Discussion

User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 26 Old 05-18-2013, 06:44 AM Thread Starter
Powerstroke.org Fanatic
 
colecoop56's Avatar
 
Join Date: May 2013
Posts: 127
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 2 Times in 1 Post
Feedback Score: 0 reviews
Which Gear Ratio would be better for 35s? 3.31 or 3.55

Hey guys I am about to order my truck from the dealer and I am trying to figure out which gear ratio to go with. Will one be better than the other if I want to run 35s? I want the gear ratio that will get me the best mpg when I step up to 35s and the ratio that I will be happy with in the future. I know my duramax im trading in has 3.73 and they seem perfect for my 35s. Can someone please tell me which ratio would be better for me and the benefits of each ratio. I just don't want to mess up and get the wrong one.

Thanks,

Cole
colecoop56 is offline  
post #2 of 26 Old 05-18-2013, 07:14 AM
Compression Ignition Addict
 
WoodBoy's Avatar
 
Join Date: Sep 2010
Posts: 1,706
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 1
Thanked 16 Times in 16 Posts
Feedback Score: 0 reviews
3.55. You can only get 3.31 with the stock 18s anyways. If you was going to leave it stock size tires and wheels and do alot of highway I would say 3.31 but the 3.55s seem to fit everyone's needs

2010 CC/SB FX4 Lariat.. Tuned By Eric@IDP and Matt@Gearhead

Thinking about getting rid of the stock 6.7 turbo?
Check this out... and research before buying



http://www.powerstroke.org/forum/6-7...ustration.html

http://www.powerstroke.org/forum/6-7...round-2-a.html
WoodBoy is offline  
post #3 of 26 Old 05-18-2013, 08:44 AM
Compression Ignition Addict
 
Baddestt's Avatar
 
Join Date: Aug 2008
Location: Central Texas
Posts: 918
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Thanks: 0
Thanked 20 Times in 19 Posts
Feedback Score: 0 reviews
Pretty simple answer: 3.55s. You'll burn more fuel with the tall 3.31 and 35s.

Enjoy the new truck when it comes in

'07 F-250 PSD 4x4 . S&B, 5" exhaust, zoodad, blue spring, '03 Turbo, 6.4 starter, 2.5 f/coils, adj Trac bar, 2" r/add-a-leafs, egr delete, DC 185 alt, Procomp shocks, SCT SF3 tuner, F-Detroit Truetrac, R-Detroit Locker, 4:10 gears, LT315/70r17 Duratracs, Amsoil Gear lube, Amsoil FE ATF, Delo 400 LE 5w30 diesel, Delo ELC, archoil 9100/ar6200, bpd ficm, arp studs, oem gaskets, HD water pump, stc, plugs, stand pipes, 6.4 banjo bolts, monitor, new oil cooler, coolant filter
Baddestt is offline  
post #4 of 26 Old 05-18-2013, 11:47 AM Thread Starter
Powerstroke.org Fanatic
 
colecoop56's Avatar
 
Join Date: May 2013
Posts: 127
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 2 Times in 1 Post
Feedback Score: 0 reviews
Thanks guys. Thats what I was thinking
colecoop56 is offline  
post #5 of 26 Old 05-18-2013, 04:49 PM
Compression Ignition Addict
 
2013F250Tank's Avatar
 
Join Date: Apr 2013
Posts: 570
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 2
Thanked 14 Times in 14 Posts
Feedback Score: 1 reviews
i had 3.55 and hit 6th gear at 40mph. Have 3.31 now with 33s and dont hit 6th till 50mph. Gearing is low enough in the new trans i'd go with 3.31.

13 F250 Lariat CC SB 3.31 EL axle w/SPE full lock module, Ultimate Interior,
H&S Big Single 64mm NON VGT Turbo Kit, Cast manifolds, NON Cobra downpipe, Mini MAxx w/H&S stock fuel tune
Down Pipe back 304T 4" Diamond Eye, AFE stage II intake, front 4 link,
Road Armor bumpers front/rear. N Fab nerf steps. 20" American Force w/Trxus 33",
Dura flaps, Air Lift rear bags, 34k+ miles, Stage 3 traction block bars.


2012 F250 TOTALED.

Civilian Contractor Airforce 2+ years Asscrackistan.
2013F250Tank is offline  
post #6 of 26 Old 05-18-2013, 04:54 PM Thread Starter
Powerstroke.org Fanatic
 
colecoop56's Avatar
 
Join Date: May 2013
Posts: 127
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 2 Times in 1 Post
Feedback Score: 0 reviews
Quote:
Originally Posted by 2013F250Tank View Post
i had 3.55 and hit 6th gear at 40mph. Have 3.31 now with 33s and dont hit 6th till 50mph. Gearing is low enough in the new trans i'd go with 3.31.
Ya but if I wanted to go 35s I'm not sure. What mpg are you getting with the 33s and 3.31 gears highway if you dont mind me asking
colecoop56 is offline  
post #7 of 26 Old 05-19-2013, 09:26 AM
Compression Ignition Addict
 
2013F250Tank's Avatar
 
Join Date: Apr 2013
Posts: 570
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 2
Thanked 14 Times in 14 Posts
Feedback Score: 1 reviews
60 mph driving like a grandpa 21 mpg. Around florida so flat helps too.

13 F250 Lariat CC SB 3.31 EL axle w/SPE full lock module, Ultimate Interior,
H&S Big Single 64mm NON VGT Turbo Kit, Cast manifolds, NON Cobra downpipe, Mini MAxx w/H&S stock fuel tune
Down Pipe back 304T 4" Diamond Eye, AFE stage II intake, front 4 link,
Road Armor bumpers front/rear. N Fab nerf steps. 20" American Force w/Trxus 33",
Dura flaps, Air Lift rear bags, 34k+ miles, Stage 3 traction block bars.


2012 F250 TOTALED.

Civilian Contractor Airforce 2+ years Asscrackistan.
2013F250Tank is offline  
post #8 of 26 Old 05-19-2013, 09:47 AM
Compression Ignition Addict
 
6.0f250firstcar's Avatar
 
Join Date: Jul 2012
Location: New Joisey
Posts: 3,594
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 23
Thanked 62 Times in 46 Posts
Feedback Score: 0 reviews
3.31 gears with the bigger tires are going to be really tall. IMHO the 3.55 gears are just right for these trucks.


Sent from AutoGuide.com Free App

Ryan
6.0f250firstcar is offline  
post #9 of 26 Old 05-19-2013, 10:27 AM
Powerstroke.org Rookie
 
Join Date: May 2013
Location: Rathdrum ID
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I have 35"s (285/75/18 Toyo M/T) with 3.31's with 800ftlbs at 1600 rpm I can honesty say I can hardly even tell the difference over the stock 33.2" tires (Connti 275/70/18 AT's).
GroverDill is offline  
post #10 of 26 Old 05-19-2013, 06:32 PM
Compression Ignition Addict
 
raftdaddy's Avatar
 
Join Date: Jan 2012
Location: thompson manitoba
Posts: 369
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 7 Times in 7 Posts
Feedback Score: 0 reviews
just order the stock 20's they have a 34.7 tire,then your done!!


2012 f350 lariat,35x12.50x20 on moto metal mo962 in 20x9 with o offset.bil 5100's,readylift 2.5 level
raftdaddy is offline  
Reply

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

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