differential gears
Thread Starter
|
Cargo Master
Joined: Sep 2003
Posts: 2,110
Likes: 32
From: southwest pa
differential gears
alright, im planning my next step with the truck. planning on a regear and dont know if i should go with 4.88s or 5.13s? im running 36x14.50 tsl's and gonna have a mild 390. i'm also going to be buying detroits with the gear change. im thinking the 4.88s will be good for this tire setup, but i'm kind of considering going with the 5.13s
Senior User
Joined: Apr 2005
Posts: 453
Likes: 0
Well most people i know run between a 4:10/4:56 for 33-35 tires. But i would think a 4.88 would be ok for a 36-37. It just depends on if you are driving this on the street alot, size of axels, size of motor, and future plans and upgrades.
Last edited by Ford150/428/dud; Dec 27, 2007 at 10:27 AM.
Senior User
Joined: Jul 2007
Posts: 377
Likes: 0
From: ct
i had 4:56 and 36's on my last rig, and it was as close to as perfect as ya can get.
between the two mentioned, git the 4:88's
i dont think you will get what you want out of 5:13 ratio.
if yer not ever gunna go bigger on sneakers, i would reconsider 4:56 for highway purposes alone...
between the two mentioned, git the 4:88's
i dont think you will get what you want out of 5:13 ratio.
if yer not ever gunna go bigger on sneakers, i would reconsider 4:56 for highway purposes alone...
Senior User
Joined: Dec 2007
Posts: 363
Likes: 0
From: Raleigh, NC
I'm running 38.5's with 4.88's. This does good both on and off road. If you run only off road you could go lower for power and climbing.
Trending Topics
Post Fiend
Joined: Mar 2005
Posts: 8,542
Likes: 5
From: Louisiana
I'd use either 4.56s or 4.88 gears.
If you want something lower than that, then put it in 4 Lo.
Sometimes you'll want wheel speed, and you won't get that with 5.13s.
Unless your going to be on rocks, don't worry about the 5.13s.
I have a stock 400 and 36.8" tires and 4.56 gears and I'm happy with them.
Night and day difference over stock
If you want something lower than that, then put it in 4 Lo.
Sometimes you'll want wheel speed, and you won't get that with 5.13s.
Unless your going to be on rocks, don't worry about the 5.13s.
I have a stock 400 and 36.8" tires and 4.56 gears and I'm happy with them.
Night and day difference over stock
Last edited by MBBFord; Dec 27, 2007 at 06:12 PM. Reason: wanted to add something
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Thread Starter
|
Cargo Master
Joined: Sep 2003
Posts: 2,110
Likes: 32
From: southwest pa
im going to be doing mostly mud. its the truck in my sig. i was leaning more toward the 4.88s myself. i'd like to be able to run 40s in the future, i think i can fit them with the lift thats on there now. thanks guys, appreciate the help.
Post Fiend
Joined: Jun 2002
Posts: 13,873
Likes: 3
From: Atlanta GA
With the 390, the best (manual) tranny ratio will be 1:1.
I would buy the wheels and tires, put them on the truck, drive it for 500-1000 miles to break them in. Then measure the rear tire diameter and gear the rear end so I got 2100 rpms (whatever you want) at 55 mph.
I would buy the wheels and tires, put them on the truck, drive it for 500-1000 miles to break them in. Then measure the rear tire diameter and gear the rear end so I got 2100 rpms (whatever you want) at 55 mph.
Thread
Thread Starter
Forum
Replies
Last Post
GuitarJesus
1987 - 1996 F150 & Larger F-Series Trucks
7
Aug 29, 2016 07:52 PM
01FordEx
Excursion - King of SUVs
27
Apr 22, 2016 05:54 PM