Notices
1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

IRS Swap options?

Thread Tools
 
Search this Thread
 
Old Jul 8, 2018 | 07:24 PM
  #1  
Dano61's Avatar
Dano61
Thread Starter
|
Cross-Country
Joined: Jan 2018
Posts: 82
Likes: 1
IRS Swap options?

Two questions -

1. Is there any specific rear end that I could get that would bolt in on my ‘66 F100 that would be an upgrade and give me the 5x4.5 lug pattern? Or possibly swapping out just the axles?

2. Does anyone have the part number for the rear leaf springs in a ‘66 F100?
 
Reply
Old Jul 9, 2018 | 09:33 PM
  #2  
hello113's Avatar
hello113
Mountain Pass
Joined: Oct 2016
Posts: 194
Likes: 0
dano you probably have a 9 inch with 28 spline axels in it 5x5 pattern?
if so a company called moser engineering will drill the 5x4.5 pattern in them and will fill the big hole in them if it has them for not to much money
mike
 
Reply
Old Jul 10, 2018 | 09:34 AM
  #3  
Dano61's Avatar
Dano61
Thread Starter
|
Cross-Country
Joined: Jan 2018
Posts: 82
Likes: 1
I’m seeing a lot of people installing the T-Bird IRS. My only question is what years will work?
 
Reply
Old Jul 11, 2018 | 07:16 AM
  #4  
dman2008's Avatar
dman2008
Posting Guru
Joined: Oct 2008
Posts: 1,038
Likes: 11
From: Southern AB
Club FTE Silver Member

Originally Posted by Dano61
I’m seeing a lot of people installing the T-Bird IRS. My only question is what years will work?
I believe it starts in 88 till 1997. Also if you can find one with rear disc and a locker. The one I Installed in my 57 was out of a 93 cougar and it had disc brakes with a 3.08 locker 8.8 diff. I bough wheel adapters to go from 5x4.25 to 5x4.5 bolt pattern or you can install the Mustang Cobra wheel bearing and rotor to get 5x4.5 with no adapter. Team 321 makes a installation kit.

https://en.wikipedia.org/wiki/Ford_MN12_platform

D
 
Reply
Old Jul 11, 2018 | 11:48 AM
  #5  
TheMonson's Avatar
TheMonson
More Turbo
Joined: Oct 2014
Posts: 504
Likes: 4
From: Malheur County
I think the Lincoln Mark VIII has it too.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
cudaboy68
1948 - 1956 F1, F100 & Larger F-Series Trucks
5
Jan 18, 2015 03:32 PM
fordtruckguy98
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
12
Oct 29, 2014 02:36 PM
ohbrian
1948 - 1956 F1, F100 & Larger F-Series Trucks
7
Oct 16, 2013 12:08 PM
mkrog
1957 - 1960 F100 & Larger F-Series Trucks
7
Jan 18, 2012 09:53 PM
addicted56
1948 - 1956 F1, F100 & Larger F-Series Trucks
14
May 4, 2009 05:07 PM




All times are GMT -5. The time now is 04:41 PM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE