Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1973 - 1979 F-100 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 01-14-2014, 10:10 PM
Ashton460's Avatar
Ashton460 Ashton460 is offline
New User
 
Join Date: Jan 2014
Posts: 5
Ashton460 is starting off with a positive reputation.
1978 f250 4wd conversion idea

Hey guys I have interesting idea and was wondering if anyone has ever done it or has seen it done on a older truck. I have a 1978 F250 ranger 2wd and I want to convert it to 4wd. I know that most people that do this do a frame swap because of the difference of the coil spring frame to the leaf spring frame. And I'm not a fan of the ttb frontends. So my idea is to take the frontend out of the 6.0 powerstroke since it is a coil over spring frontend and a straight axle. I think by doing this I wouldn't have to deal with doing a frame swap as long as the frame widths are same from my 1978 to the 6.0?
Please let me know your opinion, Thanks
Reply With Quote
  #2  
Old 01-14-2014, 11:04 PM
iggybob44's Avatar
iggybob44 iggybob44 is offline
Post Fiend
 
Join Date: Apr 2008
Location: Grants Pass, Oregon
Posts: 5,346
iggybob44 has a brilliant futureiggybob44 has a brilliant futureiggybob44 has a brilliant futureiggybob44 has a brilliant futureiggybob44 has a brilliant futureiggybob44 has a brilliant futureiggybob44 has a brilliant futureiggybob44 has a brilliant futureiggybob44 has a brilliant futureiggybob44 has a brilliant futureiggybob44 has a brilliant future
I suspect its a little more complex than this, judging by the fact that there are some amazingly talented fabricators who post here, and i dont recall hearing of this exact swap.........I also am guessing that a 6.0 will eat up a Dana 60 rear axle, which is what your 78 F250 should have.
__________________
80 Chevy K20,350,350,np205,ute bed,Ramsey RE10000
07 Dodge 2500,cummins 5.9,a/t,4x4 daily driver
00 Suzuki 250 Quad 4x4
77 F250 Highboy, 460,C6, 205, Warn 8274
76 F250 Highboy, 390, C6,205, Koenig PTO winch
73 F250 Ranger XLT Camper Special 429, C6
Reply With Quote
  #3  
Old 01-14-2014, 11:47 PM
f250rangerexplorer's Avatar
f250rangerexplorer f250rangerexplorer is offline
Posting Guru
 
Join Date: Aug 2004
Location: Yuba City, Ca
Posts: 1,137
f250rangerexplorer is gaining momentum as a positive member of FTE.
Well funny thing you are asking this because I looked at doing this exact same thing.. Converting a 1973 F-350 SCS to 4wd. It can be done but I will tell you that to do it right you are going to need to either lift the truck substantially to allow the axle to clear the cross member or remove the cross member and build a custom one. The frame widths are quite a bit different also. The 2wd frame is like 31" center and the 6.0 frame is like 42" (iirc). Custom link bars would be necessary for the frame width difference and youd have to fab a trac bar as well.

Eventually I will do this swap but for now I went ahead and used pre-made leaf hangers from a local company and used factory 77.5-79 shackle hangers (frame mount) and factory shackles with 3" superduty leaf springs, cross over steering and custom trac bar. Everything turned out rather nice and axle placement was easy enough. I don't know that id want to do it any other way than having nothing forward of the bed on the chassis. The rivets aren't bad to remove with a grinder and torch and nice big ballpein hammer. it just getting everything apart that was welded from the factory.

If I was to do it all over again I would go the same route I went. Total cost was around $1300. Dana 44 axle $400, Parts to freshen axle $250, Cross over steering parts $250, Tie Rod Kit $150, Hanger $50, Hardware $90, and steering box F-150 $100.

Just a little insight, hope this helps.
__________________
-Aaron
2005 F-350 Lariat, CCLB DRW 6.0l, 5R110, Fx4, 4.10's 199k
4" TBE w/kitty, 285/70r17's, 3" Lift Kit, B&W Gooseneck Hitch, Studs soon to come.
1999 F-350 Lariat, ECLB DRW 6.8l, 4R100, 4x4, 4.30's 129k
285/75R16's, 2.5" Level Kit, Gooseneck and All Stock
Reply With Quote
  #4  
Old 01-15-2014, 09:59 AM
77&79F250's Avatar
77&79F250 77&79F250 is offline
Workaholic
 
Join Date: Feb 2007
Location: S/W Missouri
Posts: 15,740
77&79F250 has much to be proud of77&79F250 has much to be proud of77&79F250 has much to be proud of77&79F250 has much to be proud of77&79F250 has much to be proud of77&79F250 has much to be proud of77&79F250 has much to be proud of77&79F250 has much to be proud of77&79F250 has much to be proud of77&79F250 has much to be proud of
Here is a little cut and past info for you.

There is nothing nuts and bolts about a 4wd conversion, there is not a thing that is bolt on or swappable.
The engine cross members are entirely different, and this means that if an un molested truck is what you are after, it will be impossible to create one with a 2wd platform. The 2wd will have to be lifted quite a way to clear the front diff. 2wd trucks are coil sprung and most F250 4wd's are leaf sprung. None of the suspension items are even close to the same, so you will be fabricating or modifying some original 4wd stuff to work.

Steering systems are entirely different as well, so you will be upgrading that too. My last conversion with leafs ran me several thousand dollars, and that was with the work that I performed for free.
The difference in sale values between a 4wd and 2wd are minimal, and the 4wd conversion is hardly justifiable. How far away are you looking? I pick up F250 4x4's for reasonable money. Consider the cost of shipping, and then consider buying a west coast truck with no rust, and I can guarantee that you will be time and money ahead.

Well the frames are similar, with a few exceptions. The frame horns are slightly different, and the frame widths aft of the cab ar different from 73 to 77 trucks. The frame rise is also slightly different, but this is not a show stopper and does not make much difference one the fabrication begins.
Not that the important question is whether or not you will be using a coils springs or a leaf spring. It is possible to install a 78/9 radius arm and suspension. Not a big deal really, and with a standard cab this is reasonable. Not quite as easy with a super cab and or crew cab.

The 2wd frames are not cut for the shackle pivot, and they do not have the provisions for a spring hanger, but again, this is not a deal breaker. Installing a pivot is just a tedious process. Accuracy is key, but I am not telling you anything that you do not already know.

Ok, so next is the transfer case. You have two choices, Install a married case, and this requires the proper transmission. Might find some difficulty making or modifying an output shaft to accommodate the early C6 and a married transfer case. So then the next option is to find a divorced transfer case, and install this. You will have to make up a cross member, but then you will have to get creative with the shifter linkage. See the 4wd trans will have an adapter or tailshaft with a pivot for a typical 205 shifter. Fabrication is the only limiting factor here.

Next and final factor will be the speedo. See your speedo works from the trans, so that being the case, you will have to get a speed reference form the t-case. If you do not, the speedo will read twice as fast when you put the case in low range.

As mentioned the steering box will have to be relocated, and the truck will require some lift. That engine crossmember has limited clearance so you will be looking at some lift to even clear it. The other option would be to remove it and replace it with a tubular unit.

This is a heck of a project. Not unreasonable, but a project none the less. 2500 bucks for a 2wd might get expensive. I paid 1300 bucks for a 4wd 75 last year, and it was already 4wd with 38" tires, and a strong 460, A/c, and plenty of goodies. I have made these conversions, and can tell you that it is a chore.
__________________
77&79 F250 Rich & Penny
77 351M auto, a/c, add a leaf 33x12.50's
78 (79 headlights) 460 4 spd, 4", a/c and 35's
79 351M 4spd 6" Skyjacker Edelbrock-Holley-Hedman 35's
99 Ranger 4x4, 98 Expedition 4x4, 73 Bronco Hillbilly-Bug
71 Bronco 302 35" Boggers 5.58 gears spool/locker
Reply With Quote
Old 01-15-2014, 09:59 AM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1973 - 1979 F-100 & Larger F-Series Trucks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
1978 F250 Differential Swap KoltonFuller 1973 - 1979 F-100 & Larger F-Series Trucks 1 04-01-2014 07:47 AM
78 F 250 super cab 2wd converting to 4wd 78ecf250cs 1973 - 1979 F-100 & Larger F-Series Trucks 7 10-04-2010 09:35 PM
Quick answer? 79 F150 2WD Cab on 79 F250 4x4 frame? eglaisi2 1973 - 1979 F-100 & Larger F-Series Trucks 8 10-06-2009 08:38 PM
46 with 40 frontend M998 1947 and Older Ford Trucks 20 03-19-2007 05:26 PM
F-350 in a F-150 shell Ford460BBpower 1973 - 1979 F-100 & Larger F-Series Trucks 6 08-23-2002 10:30 PM



All times are GMT -5. The time now is 03:19 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup