4.2L upgrades
Postmaster
Joined: Jun 2003
Posts: 3,310
Likes: 0
From: Lufkin
Originally Posted by brianteel
what size rockers can be used on a stock motor
My goodness...
Ok, go to "contact info" or something of the sort, and call them toll free and ask. It's that simple. All you need to do is get a locker that fits an 8.8 Ford (your year) truck. Make sure it's a 31 spline. That's it!
It's another Ford site with a sponsor than I got my T-lock from. He can sell you gears or a locker and he has plenty of them. Have you even researched?
I could go to google and do a search and I'll bet I could come up with 10 different places that would carry a locker for you.
Also, there is a thread at the top of this forum called Power Recommendations or something like that. That has about a million sites listed as well.
Freshman User
Joined: Jun 2004
Posts: 33
Likes: 0
I have the 2004 heritage also. They do not come with 3.08 gears, that I can see. The most common gear by far is the 3.31. oddly enough my window sticker says 3.31 but the vehicle ID sticker says 3.55. I will have to do more research I guess. 
FTE Leadership Emeritus
Joined: Jan 2003
Posts: 161,999
Likes: 75
From: 3rd Rock
nebraska911...Welcome to Ford Truck Enthusiasts! If you have a minute check out the Guidelines, it will help you to navigate through and understand FTE.
Stick around someone will be by shortly to answer your question.
We are pleased you have chosen the best source for Fords!
Enjoy....and
JOIN CLUB FTE -SUPPORT THE FORUMS!
…..See you on the boards.
Stick around someone will be by shortly to answer your question.
We are pleased you have chosen the best source for Fords!
Enjoy....and
JOIN CLUB FTE -SUPPORT THE FORUMS!
…..See you on the boards.
Postmaster
Joined: Jun 2003
Posts: 3,310
Likes: 0
From: Lufkin
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / Worst Features Of The 2025+ Ford Expedition
Brett Foote
10 Ways Ford is LOSING to the Competition
Joe Kucinski
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
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
New User
Joined: Mar 2005
Posts: 4
Likes: 0
Well at this time I would like not to spend a whole lot, Just try it out to see. Even on the 5.8L didnt really go crazy. Would like to see if a muffler,Air cleaner,and other things that arent really pricy. trying to find areas that even have 2005 4.2L add ons are going to be harder to find(maybe). Any Ideas at this time will help. Thanks for your time in this matter. Doug..
Postmaster
Joined: Jun 2003
Posts: 3,310
Likes: 0
From: Lufkin
Hmm, I noticed you said 2005 with a manual tranny. I didn't even know they came with a stick. I'm out of the times man...
Also, I know nothing of the 2005 newer 4.2 mods...my best answer would be to try a search on the internet.
Also, I know nothing of the 2005 newer 4.2 mods...my best answer would be to try a search on the internet.
New User
Joined: Mar 2005
Posts: 3
Likes: 0
Sorry, I'm a bit new to actually working on trucks, I just wanted to know what swapping out my rear differential would entail, how much time and if there were any special tools needed.
If you guys could just give me something basic that'd be awesome. thanks.
If you guys could just give me something basic that'd be awesome. thanks.
Postmaster
Joined: Jun 2003
Posts: 3,310
Likes: 0
From: Lufkin
Normally, you should post a new thread for this, but I'll give some advice...
Swapping out the rear end is a pretty difficult process, especially, if you've never done it before. There are special tools needed for doing this, and if you do it yourself with normal tools, it will take an entire weekend if you're lucky. I'm curious, are you swapping for different gears, or just getting the same gears or what?
I know off hand you'll need a pinion depth gauge measure thingy, some kind of hammer, a lot of socket heads and a couple different ratchets, screw driver, differential oil, brake cleaner, big jack, jack stands, and probably some other tools.
Swapping out the rear end is a pretty difficult process, especially, if you've never done it before. There are special tools needed for doing this, and if you do it yourself with normal tools, it will take an entire weekend if you're lucky. I'm curious, are you swapping for different gears, or just getting the same gears or what?
I know off hand you'll need a pinion depth gauge measure thingy, some kind of hammer, a lot of socket heads and a couple different ratchets, screw driver, differential oil, brake cleaner, big jack, jack stands, and probably some other tools.
Thread Starter
|
Freshman User
Joined: Aug 2003
Posts: 39
Likes: 0
i am trying to decide if i should do it myself or pay some one also. Anyone every pay to have one install and have a cost for it. for replacing the diff
any one know what the vin reads....like what each number/letter is for
any one know what the vin reads....like what each number/letter is for
New User
Joined: Jan 2016
Posts: 1
Likes: 0
Need to u understand
MAC Intake is the best.
MAC Headers are also IMO the best. They are equal length ceramic coated shorty headers for $300 a set. You can get them at macperformance.com.
If you are going for performance, get a Flowtech Warlock. They are a straight through design and are louder than Flowmasters. For more information on the mufflers just do a search for them on internet.
The rear end depends...you either have a 3.55 rear end or a 3.08 rear end with a 31 spline gear. Mike at Texas Motorsports can hook you up with a set of gears and LSD for a good deal. He is sponsored at v6f160.com.
MAC Headers are also IMO the best. They are equal length ceramic coated shorty headers for $300 a set. You can get them at macperformance.com.
If you are going for performance, get a Flowtech Warlock. They are a straight through design and are louder than Flowmasters. For more information on the mufflers just do a search for them on internet.
The rear end depends...you either have a 3.55 rear end or a 3.08 rear end with a 31 spline gear. Mike at Texas Motorsports can hook you up with a set of gears and LSD for a good deal. He is sponsored at v6f160.com.