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4x4 coversion

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Old Mar 22, 2011 | 01:20 AM
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4x4 coversion

Hi i have a 96 f250 2wd and i am in the process of making it 4x4. i was wondering if i could use the IFS F150 axles And just change the the knuckles so i could have coil suspension with 8 lug rims this would eliminate the need to put leaf springs under the front
 
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Old Mar 22, 2011 | 11:42 AM
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You would have to change the whole suspension in the front end and your ruining the weight carrying abilities in the front end that way. Most people are trying to go from the IFS to a straight axle with the leaf springs in the front. Just get a front end out of a 80-97 F250 or F350 it is a very very simple swap.
 
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Old Mar 22, 2011 | 12:57 PM
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Hi i have a 96 f250 2wd and i am in the process of making it 4x4. i was wondering if i could use the IFS F150 axles And just change the the knuckles so i could have coil suspension with 8 lug rims this would eliminate the need to put leaf springs under the front.
I like your thinking - I have a friend who has a 90 F250 he wants to convert to 4x4 and I recommended this to him. I don't think leaf springs and TTB go together. I have not looked at it closely but I am wondering if you can just fasten the coil spring cups (the donut that sits on top of the axle and goes up inside the spring) from an F150 to F250 TTB axles? Your truck of course already has the upper coil spring mounts in place.
 
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Old Mar 22, 2011 | 12:59 PM
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You would have to change the whole suspension in the front end
I disagree with this. The 2wd F250 has coil springs and the 4x4 has leaf springs. He is trying to stay with the coils. This would seem to me to be less swapping, not more.
 
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Old Mar 22, 2011 | 01:06 PM
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Originally Posted by Redneck1465
You would have to change the whole suspension in the front end and your ruining the weight carrying abilities in the front end that way. Most people are trying to go from the IFS to a straight axle with the leaf springs in the front. Just get a front end out of a 80-97 F250 or F350 it is a very very simple swap.
It's not that simple. Converting from coil to leaf springs is quite a bit of extra work and may even require some fab work. F-250's came from the factory with Dana 44 axles anyway so it's not like you're putting weaker parts in it than Ford used. Yes a Dana 60 is stronger but they are also a lot more $$$$ and if he doesn't need the strength then why spend the money.

Originally Posted by jas88
I like your thinking - I have a friend who has a 90 F250 he wants to convert to 4x4 and I recommended this to him. I don't think leaf springs and TTB go together.
Why is that? I hope you have a very good reason.

Originally Posted by jas88
I have not looked at it closely but I am wondering if you can just fasten the coil spring cups (the donut that sits on top of the axle and goes up inside the spring) from an F150 to F250 TTB axles? Your truck of course already has the upper coil spring mounts in place.
I'm not sure if the coil mounts will work on a TTB leaf-sprung axle. I know they bolt on but I'm not sure if the housing is fabbed differently or not. At any rate, if he's using an F-150 front axle it's a moo point.

I would say do it. F-150 TTB axles are dirt cheap and it's probably the cheapest and safest way to make your truck 4x4. You know you need a 4x4 transmission or run a divorced t-case, right?
 
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Old Mar 22, 2011 | 01:27 PM
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more on the conversion

the truck has a 351 in it so im not to worried about the weight or load carrying. i just want to do it different every one puts a straight axle under the front. i also have the trans and t case but its out of a half ton its not a zf but it came out of a half ton with a 351 in it so i think it will work
 
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Old Mar 22, 2011 | 02:08 PM
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Why is that? I hope you have a very good reason.
Think about how a TTB flexes at full extension - the spindle is moving in an arc down and toward the center of the frame. The leaf spring can only move up and down in a vertical motion. This puts the leaf-sprung TTB in a bind as it moves toward full extension. The same is true as it approaches full compression. The coil spring does not have this limitation, it can follow the motions of the swing-arm much better.
 
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Old Mar 22, 2011 | 05:10 PM
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Its not very easy to swap a F150 D44 from 5lug to 8lug. You have to do alot of hunting and find the exact right parts otherwise it wont work. If i remember correctly, you need the outer axle stubs, spindle, caliper bracket, hub, rotor and caliper off of a late 60's Chevy 3/4ton with a 8lug dana 44. On top of needing all the parts, you have to get the right year to have the right caliper bracket, because there are a couple designs that dont work because they hit the knuckle.

You have to make sure to get a D44 TTB that has a 6 blot spindle. The newer ABS trucks are 5 bolt spindles that wont work. You will have to trim and clearance the TTB knuckle alot to make it all fit.

I did it on my truck and i would have much rather gone with a Dana 60 and after less then a year im ready to swap a d60 in.

Also the older axle shafts from the Chevy have a weaker yoke, and im just waiting for it to break.

I wouldnt worry to much about leaf springs binding because of to much flex. I dont think it would cause any problems. unless you want crazy amounts of travel, there is enough play in the bushings and flex in the springs to let the axle move where it wants.
 
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Old Mar 22, 2011 | 05:32 PM
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I would think it would be just as easy to get the F250, Dana 50 TTB as it will be to get an F150 Dana 44 TTB. Look around for any of the F250 guys doing the Dana 60 SAS, and see if you can nab the TTB setup for next to nothing. It's going to preserve the weight capability of the truck and it's going to be leaf spring suspension like factory F250's have.

This is also going to get you the 8 lug outers that you want without any of the hassle of dealing with mixing and matching parts.

Also, I don't see binding being an issue with the stock leaf springs (at least I've never seen the problem in my truck).
 
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Old Mar 22, 2011 | 06:59 PM
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Originally Posted by Redneck1465
Just get a front end out of a 80-97 F250 or F350 it is a very very simple swap.
just another day at the office hey?
 
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Old Mar 22, 2011 | 11:48 PM
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wow

Originally Posted by fordman1090
Its not very easy to swap a F150 D44 from 5lug to 8lug. You have to do alot of hunting and find the exact right parts otherwise it wont work. If i remember correctly, you need the outer axle stubs, spindle, caliper bracket, hub, rotor and caliper off of a late 60's Chevy 3/4ton with a 8lug dana 44. On top of needing all the parts, you have to get the right year to have the right caliper bracket, because there are a couple designs that dont work because they hit the knuckle.

You have to make sure to get a D44 TTB that has a 6 blot spindle. The newer ABS trucks are 5 bolt spindles that wont work. You will have to trim and clearance the TTB knuckle alot to make it all fit.

I did it on my truck and i would have much rather gone with a Dana 60 and after less then a year im ready to swap a d60 in.

Also the older axle shafts from the Chevy have a weaker yoke, and im just waiting for it to break.

I wouldnt worry to much about leaf springs binding because of to much flex. I dont think it would cause any problems. unless you want crazy amounts of travel, there is enough play in the bushings and flex in the springs to let the axle move where it wants.
thanks for the eye opener. my second option is a 44hd that i have out of a 70s f250 i will still need leaf spring but it sounds easy than the last option does any one know where i can buy the spring hangers for front leaf springs
 
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