Towing Modifications
Thread Starter
|
New User
Joined: Aug 2017
Posts: 1
Likes: 0
Towing Modifications
I have a 2003 F250 Super Duty 4x4 with V10. I want to buy a fifth wheel Ford says it will tow 10,000 pounds. That's not a very big trailer. Is there any modifications that can be done to tow more. It has 3.73 gears and stock engine. It has Kand N cold intake set up but that's it.
Elder User
Joined: Feb 2006
Posts: 545
Likes: 5
From: FL
You can swap rear end to 4.3 , that will increase 5th wheel towing capacity to 13,800 Lbs (like my truck). That's all you can do in real terms . Make sure the 5th wheel you want to buy has a "hitch weight" less than 2000 Lbs. and the less the better ( since your F-250 has less gross vehicle weight rating -GVWR , compared to F-350 and there is nothing you can do about it ) . After market additions (tunes, air-bags,etc) will not increase your factory recommended towing capacity . Good luck,
Cargo Master
Joined: Apr 2013
Posts: 3,087
Likes: 24
From: Central Florida
lol I like how you mention gears twice:
like swapping from 3.73's to 4.10's and loving that. Then get headers and free flowing exhaust, and then spend another $1500 on gears again to go even lower.
Good times.
like swapping from 3.73's to 4.10's and loving that. Then get headers and free flowing exhaust, and then spend another $1500 on gears again to go even lower.
Good times.
Moderator
Joined: Jul 2010
Posts: 12,050
Likes: 1,549
From: Media PA
My list would be:
Gears
Tunes
Gears
Headers
Gears
Exhaust
Gears
But I'm not suggesting to redo the gears multiple times, I'm just stressing how going with deeper gears is THE BEST option for improving the towing prowess of the V-10 platform. My V-10 EX only tows (11,000lb TT) for us these days with no daily driving and I have done all the mods I listed and without question, the deeper gears made the single biggest improvement in towing performance.
Tuned
Joined: Jul 2003
Posts: 274
Likes: 20
I agree that the answer is gears.
I've towed heavy with two different V-10 Superduty trucks. The first came stock with 3.73 and I paid to change it over to 4.30. That made all of the difference. When I ordered my current truck I spec'd out 4.30's to begin with.
It really makes a huge difference in the V-10 trucks.
I've towed heavy with two different V-10 Superduty trucks. The first came stock with 3.73 and I paid to change it over to 4.30. That made all of the difference. When I ordered my current truck I spec'd out 4.30's to begin with.
It really makes a huge difference in the V-10 trucks.
Elder User
Joined: Jul 2005
Posts: 974
Likes: 11
OP: where do you live, what elevation? And what kind of terrain and speeds will you typically be towing?
The answers to those questions would help to dictate just how deep of gears you may consider.
The answers to those questions would help to dictate just how deep of gears you may consider.
Trending Topics
Lead Driver
Joined: Mar 2013
Posts: 7,460
Likes: 85
From: Kent Station, WA
Play around with the calculator at 4lo.com to find the sweet spot.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Fleet Mechanic
Joined: Oct 2004
Posts: 1,394
Likes: 104
From: Southern KS
I have only had 2 F250's. A 99 v10 and my current 2007 V10. Prior to buying the 99 I test drove 2 v10's back to back...a 3:73 and a 4:30. I ordered the 4:30.
My current v10 also has the 4:30. I can't imagine either truck without them.
My current v10 also has the 4:30. I can't imagine either truck without them.
Thread
Thread Starter
Forum
Replies
Last Post
racinghoss
1999 - 2016 Super Duty
3
Jun 17, 2009 09:43 AM