Need some help regearing
Thread Starter
|
New User
Joined: Aug 2011
Posts: 4
Likes: 0
Need some help regearing
My trucks a 95 F-150 regular cab short bed. I’m working with a 302, 5 speed manual trany, 8.8 rear end with 3.55 limited slip gears. I've put a 6'' suspension lift and 35x12x15 BFG KM2s (possibly 38s when these wear out). The truck is extremely sluggish as you could imagine. I’m looking at going with 4.56 ratio but I’m not sure. I do like to play in the mud with it so I want the power and I also do some towing nothing major just atvs and utvs. This truck is more of a toy then a daily driver so I’m open to all suggestions. I’ve been told to go with a 9’’ rear end but I really have no clue what to do at this point. Any help is appreciated 
Post Fiend
Joined: Nov 2005
Posts: 7,437
Likes: 4
From: Charles Town, W bygod Va
Thread Starter
|
New User
Joined: Aug 2011
Posts: 4
Likes: 0
Thanks to bashby's link I've narrowed it down 4.10s or 4.56s. 4.10s would be perfect when driveing it to town but I'm not sure how it would do when towing. 4.56s would be perfect for towing but I'm not sure about when I'm driveing to town. I do'nt tow often but when I do the power would be nice. Is there a inbetween? Is there anyone with any of these setups I can compare to?
Senior User
Joined: Feb 2003
Posts: 247
Likes: 0
From: Greenville, NC
I have a Jeep CJ-7 with 35" tires, a 304 and 4.10 gears. They are adequate, I can tow a boat with it. I think 4.56 would be a bit better off road, especially on a heavier F-150. If you are seriously considering 38" tires, you definitely want the 4.56.
Mountain Pass
Joined: May 2010
Posts: 210
Likes: 1
From: Sandusky Ohio
Definitely without a doubt go with the 4.56 The 4.10 would be a measureable improvement but still very weak with a 302. My 95 F150 had a 351 (later a 393 stroker)- I swapped the 3.55 out for 4.10's and auburn diffs both ends, but I only had 31" tires. In my opinion, the 4.10's are perfect for 31"-33" tires; go with the 4.56's for 35"+....
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Trending Topics
Fleet Owner
Joined: Oct 2005
Posts: 20,785
Likes: 1,751
From: Kentucky
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
New User
Joined: Aug 2011
Posts: 9
Likes: 0
To ballance everything like stock for both fuel milage and torque for bigger tires.
Take your stock tire size like 31s and devide it by your diff gear ratio like 3.55-1 it will look like
31/1/3.55 you get the ratio of a single driveline rotation. Take your new tire size and that single rotationu came up with. Multiply the two and by a gear set close to that and u can save money not
Beating up the gear boxs any more then stock would've.
31/3.55 is 8.73
8.73 is what u want to match as close as posible
38/8.73 is 4.35 so get something close to that and it will handle close to stock but be bigger
Take your stock tire size like 31s and devide it by your diff gear ratio like 3.55-1 it will look like
31/1/3.55 you get the ratio of a single driveline rotation. Take your new tire size and that single rotationu came up with. Multiply the two and by a gear set close to that and u can save money not
Beating up the gear boxs any more then stock would've.
31/3.55 is 8.73
8.73 is what u want to match as close as posible
38/8.73 is 4.35 so get something close to that and it will handle close to stock but be bigger
Thread
Thread Starter
Forum
Replies
Last Post
General Geoff
1987 - 1996 F150 & Larger F-Series Trucks
15
Jul 28, 2016 11:21 AM
Raccoonjoe
1987 - 1996 F150 & Larger F-Series Trucks
14
Sep 29, 2012 09:44 AM
