4.30 gears with 35inch tires???? - Ford Powerstroke Diesel Forum
What a Powerstroke is for, Towing and Hauling FAQs, How To's, What do you pull, 5ers

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 Old 10-25-2012, 10:23 PM Thread Starter
Member
 
Join Date: May 2009
Location: nororthern california
Posts: 41
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
4.30 gears with 35inch tires????

I can't seem to find the perfect rpm range towing with 3.73 gears and 35inch tires. So I want to change gears. I have talked to several rear end shops and all of them recommended 4.30 gears. Just wanted to get some feed back from anyone running 35inch tires with 4.30 gears.

2000 F350 crew cab long bed 4x4 7.3L Diesel, 4inch procomp lift, 315/75/16 tires, 104,000 miles, 6637 air intake, zoodad mod, 4 inch MBRP turboback exhaust, AIH delete, Isspro EV2 Gauges EGT, boost, trany temp, Dp Tuner F6 hi idle, 80T, 80E, 120 Race, just installed WW
renyren is offline  
post #2 of 11 Old 10-26-2012, 01:13 AM
Serving Our Country!
 
JSchuricht's Avatar
 
Join Date: Aug 2007
Location: Manor, TX
Posts: 2,973
Thanks: 0
Thanked 25 Times in 24 Posts
Mentioned: 1 Post(s)
Quoted: 0 Post(s)
Feedback Score: 2 reviews
4.10 with 35's or 4.30 with 37's would be close to stock. How much weight are you pulling?

JSchuricht is offline  
post #3 of 11 Old 10-26-2012, 08:15 AM Thread Starter
Member
 
Join Date: May 2009
Location: nororthern california
Posts: 41
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
only about 6000 now but plan on getting a 5th wheel that will be 10000+. Problem is towing I have to do 60 out of OD or 67+ in OD to have the rpm's up enough and not lug. My truck is happy 1950+ rpm's for some reason.

2000 F350 crew cab long bed 4x4 7.3L Diesel, 4inch procomp lift, 315/75/16 tires, 104,000 miles, 6637 air intake, zoodad mod, 4 inch MBRP turboback exhaust, AIH delete, Isspro EV2 Gauges EGT, boost, trany temp, Dp Tuner F6 hi idle, 80T, 80E, 120 Race, just installed WW
renyren is offline  
post #4 of 11 Old 10-26-2012, 01:56 PM
Serving Our Country!
 
JSchuricht's Avatar
 
Join Date: Aug 2007
Location: Manor, TX
Posts: 2,973
Thanks: 0
Thanked 25 Times in 24 Posts
Mentioned: 1 Post(s)
Quoted: 0 Post(s)
Feedback Score: 2 reviews
1800 RPM is about where the turbo starts helping out and the torque starts to really come in. I got to thinking about it, 35's with 4.30 would be similar to the stock tires and 4.10 that came standard on the DRW trucks. I have the same issue with 33's on 3.73's but much more weight on a 11.5x8.5x36' trailer with a flat front. My truck is happy at 50MPH in D or 70MPH in OD, the gearing just isn't there to hold speeds in between unless you go below 2000RPM in OD or 2500RPM in D. The thing is these trucks like RPM, 2500RPM all day won't hurt it.

I would wait till you get your 5th wheel. You may find it doesn't fit with 35's and decide to go back to stock tires. I can barely clear my gooseneck on 33's at stock height and lifting the trailer would require cutting all three axles off, welding in blocks then welding the axle back in. If it weren't for the trailer I would be on 37's right now.

JSchuricht is offline  
post #5 of 11 Old 10-26-2012, 02:17 PM Thread Starter
Member
 
Join Date: May 2009
Location: nororthern california
Posts: 41
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
That is pretty much the problem I have. My truck is happy with rpm's 1900+. So it looks like you have 4.10 and 35's on one of your trucks right. Every rear end shop said the same thing, 4.10's are not a big enough change. All said to go with 4.30's. I was just looking for real world data. I go in monday and am getting 4.30's so hope it is the best choice.

2000 F350 crew cab long bed 4x4 7.3L Diesel, 4inch procomp lift, 315/75/16 tires, 104,000 miles, 6637 air intake, zoodad mod, 4 inch MBRP turboback exhaust, AIH delete, Isspro EV2 Gauges EGT, boost, trany temp, Dp Tuner F6 hi idle, 80T, 80E, 120 Race, just installed WW
renyren is offline  
post #6 of 11 Old 10-26-2012, 05:04 PM
Serving Our Country!
 
JSchuricht's Avatar
 
Join Date: Aug 2007
Location: Manor, TX
Posts: 2,973
Thanks: 0
Thanked 25 Times in 24 Posts
Mentioned: 1 Post(s)
Quoted: 0 Post(s)
Feedback Score: 2 reviews
3.73-4.10 is about 200RPM at 70MPH. My 95 had the 4.10 option from the factory and did about 2200RPM at 70MPH on stock tires. I only have 300 miles on the 35's and haven't towed anything but I am about 2000RPM at 70MPH now. Hopefully the 4.30's work out for you. Just remember you need to do both axles.

JSchuricht is offline  
post #7 of 11 Old 10-26-2012, 06:21 PM
Compression Ignition Addict
 
Joel's Avatar
 
Join Date: Oct 2008
Location: Abbotsford
Posts: 2,725
Thanks: 29
Thanked 125 Times in 113 Posts
Mentioned: 1 Post(s)
Quoted: 10 Post(s)
Feedback Score: 0 reviews
Let us know how it feels once its done

PIS 175/80's, Van Turbo with EBPV, BD Billet Wheel
Lots of money spent at RiffRaff
Holley fuel pump, in tank mods, crappy riding leveling kit, DP-F6, 5 Gauges+Edge CS in dash, CB radio in Dash, over 100 goofy little mods
Still pretty slow, just less slow now.
Quote:
Originally Posted by peixinho View Post
I love finally having my truck back... that 7.3 dog that I was driving was just not cutting it.
Joel is offline  
post #8 of 11 Old 10-26-2012, 07:06 PM
Premium Member
 
1BADTON's Avatar
 
Join Date: Oct 2007
Location: Salinas CA.
Posts: 426
Thanks: 3
Thanked 7 Times in 7 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Should have went with 4:30s in mine with 37"s but have to save up to change back. Tried to install 4:56's like i used to have, cause I felt they were all around good off the line and gas mpg's but they don't make that gearing for dana 80 so I opted for 4:88s. Built the truck to pull my "DREAM HAULER" a 40+5 WW but the economy fell, lost 15% at work and thank god never bought it. You will be happier with the 4:30s and if you go up to 37"s you still won't mind.

1BADTON
01,Lariat CCLB, 7.3L, 8" Donahoe on 37"s, John woods, ARBs, 4:88, Hansen's frt&rear, 15k Warn, HID's, DP Tunr 80econo, banks cooler, adreniline, msd dpi, optima's, autometers, more to come?
1BADTON is offline  
post #9 of 11 Old 11-14-2012, 11:53 AM
Member
 
Join Date: Sep 2008
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I went with 430's and have 35's, best mod ive done, I tow a 40ft toyhauler often.

08 f-350xlt 6.4 , spartan tuned 3.55 gears are in the bin replaced with 4.3. 35/12.5/20 toyo's
40 foot fuzion 362 toyhauler 16k fully loaded

1997 7.3
bts trans. wop injectors, afe intake, straight exhaust
4" lift 6pos ts chip.
djen223 is offline  
post #10 of 11 Old 11-22-2012, 09:14 AM
Compression Ignition Addict
 
jetjock15's Avatar
 
Join Date: Jan 2009
Location: Vegas
Posts: 3,649
Thanks: 17
Thanked 154 Times in 136 Posts
Mentioned: 7 Post(s)
Quoted: 105 Post(s)
Feedback Score: 1 reviews
I have 4.56s and my bald 37s barely measure 35", tows like a monster but max speed without trailer is 75-80, and the RPMs are up there. I'd say 4.30s/35s is perfect.

06-King/Deavers/37s/AF 22x12s/4:56/F/R Detroits/Road Armors/Warn12k/155/30s, MTW S1Billet/GoGo Manifold/Banks IC/NADP Heavy Hauler Trans/ORU Hydro-Steer/PHP tow Tune/BPD HD oil cooler/Oil & Coolant bypass/AMP steps/TransferFlow tank-toolbox

jetjock15 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