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14bolt sf

JohnDeere

JohnDeere

1/2 ton status
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Jan 17, 2006
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Location
Houston, Texas
Ok I can get a 14sf from a 2wd 91 truck with 4.10. These are questions I should know but have forgot.
Since its a 2wd it would be 5 lug right(thought they only came in 6and 8)?
Would it be a bolt in to my 85 blazer?
What ujoint would I need to attach it to my drive shaft(700r/208/10bolt)?
Would my rims fit it or is the bolt patern and are the studs differnt?
 
It will be 6-lug.

The spring perches will need to be moved.

you can swap the yoke from your 10 bolt to the 14 bolt so you don't need a conversion joint.

Rims will fit; they will be lug-centric instead of hub centric though. This has not been a problem for me though.
 
I thought they only came in 8 lug pattern. 3/4 and 1 tons... In any event, I believe that the spring perches will need to be moved to place under your blazer. Why are you going with a 14 bolt? They're big and heavy. Get a 44 and hd axle shafts. Be just as strong, but give you more clearance.
 
QUOTE]you can swap the yoke from your 10 bolt to the 14 bolt so you don't need a conversion joint.
[/QUOTE]
will I have to replace the crush sleeve in the 14bolt.

I thought they only came in 8 lug pattern. 3/4 and 1 tons.
Click to expand...
thats the full float version. this is semi-float

Why are you going with a 14 bolt
Click to expand...
Right now im running 36/14.5/15 tls and I like to power break them and I'm just scared Im going to break an axle. The semi float aint as big as the ff but its still stronger than a 10 or 12 bolt.
 
The semi float is between the 12 bolt and 14 bolt full floater as far as the pumpkin hanging down . Won't hang up as much as a full floater , but will tag more rocks than a 1/2 ton axle .


( I have an semi float 14b as a contingency plan if my 12 bolt pukes the upgrade parts :wink1: )
 
Always replace the crush sleeve. You might be able to get it out w/o any visible defects, but it has already been used as designed...

Thanks for the info. I learned something today.

I'm running 60 rear and 44 front on my blazer, but I should have gone with a 44 rear. Cheaper to work on, more clearance... Blah. Personal preference anyhow.
 
the semi-float 9.5 inch ring gear 14 bolt came in 5, 6, and 8 lug versions. i have an 88 light duty 3/4 ton that is 6 lug and is 2WD. i believe the 5 luggers are in the rear of SS454 trucks and the 8 luggers are in the heavier duty 3/4 ton trucks.
you can also find them in the 4x4 trucks such as the Z71 package.
 
Thanks for your help guys. Hopefull the guy will call me today and its a 6 lug. For $50 bucks I think its a steal. If I get it Ill put a locker in it and 4.56 gears then I can put my limited slip arburon in the front and matching gears:D
 
I'm replacing my 10 bolt with a 14 bolt SF out of a 94 3/4 2wd. Z71 would be closer for width but hard to find around here. I pulled the cover of mine this morning and the looked good. Cutting perches off this week and trying to fab disk brakes. Still need to re-gear this winter.

I'm measured a 14SF in a 80 something truck to determine if I could swap my 6 lug shafts to keep from moving the perches. Decided to just weld on new perches.
 
I can get a SF 14bolt off a 90 3/4 ton 2wd chevy truck, the guy wants 200 bucks and it includes the springs, is this worth the 200?? It's an 8-lug set up, I wonder if the axles in the 10bolt in my blazer will swap so I can keep my wheels??? Is there enough aftermarket for this axle??
 
Your 10 bolt shafts will not work in a 14bsf.
I found a light duty 2wd 3/4 ton 14b sf which has a 6x5.5 lug pattern. It is basically the same width as the stock 10bolt rear. If you can find a light duty 3/4 Z71 it will match the width of a 10 bolt six lug front with the six lug pattern. All of the 6 lug 14bsf were found in 1992+ light duty 3/4tons. Spring perches will need to be cut off and new ones welded.

I know guys have used earlier 14bsf diffs and swaped later 6 lug shafts. This requires additional brake modifications because the 6 lug shafts are longer.

I've been trying to fab disk brakes for my 14bsf and finally gave up and bought a TSM kit. It's a long story. I took my shafts in to the machine shop yesterday to have the flanges turned to accept the new rotors. Looks like a clean kit.

Gears and lockers and limited slips are available on the market.
 
hey thanx 85, I think I'm gonna go ahead and buy the axle and take the route you did and convert it to discs...now, how hard would it be to convert my front 10b to 8-lug, do I need to rob eight lug hubs from one equipped with them and that's that?? I wouldn't mind staying all 6-lug but it seems like it will take some work to stay that way...the easiest way for me to do this would be to convert the front 10b to eight lug(i guess), and getting some eight lug steelies but then I will need to buy some tires again, I aint got a lot of cash right now so this seems like it's gonna be a legthy project for me...now I'm thinking maybe I should just trash the 14b sf idea and get a 14bff and a 60 for the front, but I just can't afford all that right now. I just thought that getting the 14b sf swapped in would be easier, but it does not seem that way. I really don't do much hardcore wheelin to need the 1ton stuff, that's why i ask all these Q's about the 14b sf. Thanx all for the input.
 
I'm not sure because I've never done it, but I think you can switch the outers on the 10 bolt front. I've seen guys talking about it on here. I think 3/4ton outers will widen the track width.

If was starting over again I would go 8 lug with a 14b FF rear from the begining. I thought I was saving money and decided to just run stock 10 bolts and I bought new 6 lug steel wheels and tires. Now I'm going out of the way to keep the six lug and still get larger shafts, bearings and ring gear in rear and it would have been cheaper going to 8 lug to begin with. I'm getting alot coin dumped into this 14b sf.... Considering I have 14b FF sitting in my shop. Live and learn.

You might be able to fab disk brakes for a 8 lug 14bsf cheaper. The back plate flange has the same hole spacing as a 14bFF. I think you could use 3/4 ton front rotors and calipers and a 14bff srw disk brake adapter. I would look into it if I were you. The Semi floats had at least two different drums in the six lug. A deep drum that was about 5 inches from the axle face to the back plate flange and a shallow drum that measures about 3 inches. I think it may be the same for the 8 lugs. I would be alot cheaper then buying a complete kit.

I couldn't do this on the six lug mostly because I had to use a 11.5" dia rotor not a 12.5" dia 3/4ton rotor.

Run a search on this site. I remember reading something on a 8 lug 14bsf disk brake conversion here.

Good luck,
85CUCV
 
i've been thinking, in order to save money, I'll just keep the 14bsf with the drums and all. Now, for the 10b front, i'll try to source the 8lug hubs and I believe I'll have to get 3/4 ton front calipers too I'm guessing. Let's see what this will cost and I'll take it from there. Did you have to change anything on your rear drive shaft when you swapped the 14bsf in??
 
oh and for the record, im running 37x14 iroks on a d44 and sf 14 bolt. im using it as a stepping stone to one tons in the future. took ti wheeling, put it through hell in the mud and both stayed strong. its worth it to upgade from the 10 bolt like i did.
 
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