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14SF "tech" info

daleearnhardt01 said:
Alright those 10 bolt drums will work however, the lug holes in the drums are too small for the M14 studs to fit through. Anybody know a place where I can get a stud with a .625 knurl diameter but only 7/16 on the actual stud part?

Can I just drill the holes out in the drums???
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Tough call. It looks like I'm going to have to downgrade to 1/2 studs on mine if I want to run my slot mags. There doesn't appear to be any 14mm mag nuts. Otherwise, if I was you, I drill the drums or use 1/2 studs like loafer did on his swap. 7/16 seems too small for me.
 
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daleearnhardt01 said:
Anybody know the specs for the diff cover bolts?
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Not sure it helps, but they are the same size as the 10 bolt ones, just longer. Don't even TRY to use the shorter bolts, BTDT. :)
 
Superior gear has chart for all the torque specs for all the axles. I have printed one off their web site.

The specs,
cover bolts 20 FT. LBS
Pinion bearing Preload new 20-25 IN. LBS,
used 10-15 IN-LBS

Ring Gear backlash .005-.009
Ring Gear Bolts 105 FT. LBS
Side Bearing Caps 60 FT. LBS
 
Well I am slowly making progress towards getting this thing under the truck..

As of today the brakes are all together, wheel studs pressed in, and lock right installed. All I have to do now is weld on shock tabs and drill out lug holes on some 10 bolt drums and it will be complete.

All new brake hardware, shoes, backing plates etc along with the yukons with studs pressed in..


IMG_1611.jpg


No spacing of the backing plate needed as I have an earlier model axle, this one being from '82, so I will have to use that era 10 bolt drum to make it all work. Spring pads welded on to work in my 98..

IMG_1612.jpg




Lock Right Installed..

IMG_1609.jpg


Buttoned Up

IMG_1610.jpg
 
Just as an FYI, if you happen to break an axle when doing some burnouts on uneven road surfaces late at night after an evening out with friends and break an axle with that lockright, just pull the damaged axle/hub/brakes/wheel/tire out of the housing, throw it in the back of the truck/Blazer, and drive home (hopefully for not for then a few miles, not sure the backing plate/axle housing would last much longer).

Not that I would know anything about that or the crowd of Annapolis City Police that had some questions for me about an hour after I got home:wink1: .
 
jac6695 said:
Just as an FYI, if you happen to break an axle when doing some burnouts on uneven road surfaces late at night after an evening out with friends and break an axle with that lockright, just pull the damaged axle/hub/brakes/wheel/tire out of the housing, throw it in the back of the truck/Blazer, and drive home (hopefully for not for then a few miles, not sure the backing plate/axle housing would last much longer).

Not that I would know anything about that or the crowd of Annapolis City Police that had some questions for me about an hour after I got home:wink1: .
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Haha that is a great story indeed... :haha:

That is why I got the Yukons :p:
 
jac6695 said:
Just as an FYI, if you happen to break an axle when doing some burnouts on uneven road surfaces late at night after an evening out with friends and break an axle with that lockright, just pull the damaged axle/hub/brakes/wheel/tire out of the housing, throw it in the back of the truck/Blazer, and drive home (hopefully for not for then a few miles, not sure the backing plate/axle housing would last much longer).

Not that I would know anything about that or the crowd of Annapolis City Police that had some questions for me about an hour after I got home:wink1: .
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I guess I'm not the only person to break an axel shaft while doing a burnout on dry pavement... :rolleyes:
 
back from the dead

I am resurecting this thread to ask a question.

So i now haven 86 14bsf sitting in my garage with 31.5" 8 lug axel shafts. The 6 lug shafts I grabbed a while back from a 90s C2500 measures to be 31". Sooo close, what has the propper length shafts? The 6 lug K2500 or do I have to order custom?
 
I don't know. I think there may be different length axle shafts. Superior used have an application guide with all the axle lengths on their web site. I just checked right now and nothing.
 
I can't believe I did't see this thread when I was doing my SF14 a couple years ago. There's a lot of good info in here!

And I did not see this mentioned yet, but...

Some people here have mentioned how the yokes are interchangeable between 10 bolts and SF14?
Well, mine came from a '97 4x4 Z71. That makes it a 6 lug. It already had the same size yoke on it as my old 10 bolt! Not sure if all the 1/2 ton SF14s are that way, but mine was.
 
hey so i guess according to LMC there are only 2 different 6lug axel shafts. The 2500 2wd one that I have and the 4wd heavy half and LD2500. I need to get the measurements from the 6lug 4wd shafts
 
I've never found any evidence that you can't put any of the shafts in any of the housings. I believe that the distance from the C-clip to the bearing surface is the same on all of them and the length differences happen outside of the axle seals. This accounted for the different width brake drums.

So if you're going disc or can find drums and shoes to match, I don't think it matters.
 
Blue85 said:
I've never found any evidence that you can't put any of the shafts in any of the housings. I believe that the distance from the C-clip to the bearing surface is the same on all of them and the length differences happen outside of the axle seals. This accounted for the different width brake drums.

So if you're going disc or can find drums and shoes to match, I don't think it matters.
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Correct.. When I ran my 6 lugs shafts from Superior they were a different lenght. I did have to space my disk brackets out a little though. No problems after running them for 3 yrs.
 
Blue85 said:
I've never found any evidence that you can't put any of the shafts in any of the housings. I believe that the distance from the C-clip to the bearing surface is the same on all of them and the length differences happen outside of the axle seals. This accounted for the different width brake drums.

So if you're going disc or can find drums and shoes to match, I don't think it matters.
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I have to disagree. The length comes from between the bearing surface and the splines. The 6 lug short shafts are about an 1/2" too short to reach the propper depth in order to install the c-clips.

I just ordered 2 6 lug shafts from 4WP at 32.XX". If all my measuring/assuming :doah::crazy: is correct, I should have to space the backing plates out aprox a 1/2".

Here's some more findings:
The 6 lug backing plates flush mount while the 8 lug ones are recessed slightly by approx 1/2". The 8 lug drums are deeper than the 6 lug drums to make up for this so both axels have the same track width.
 
loafer said:
Here is the the other 14 bolt SF thread:
http://coloradok5.com/forums/showthread.php?t=170383

Now both threads are cross-linked:)


and here are a couple more relevant threads:

http://coloradok5.com/forums/showthread.php?t=110216

http://coloradok5.com/forums/showthread.php?t=63565


____________
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I'm bumping this thread as I get ready to install an Eaton e-locker in the 14Bs/f. Eaton stopped making it years ago (when H2 production stopped?). I used to search eBay for one of these lockers and never found a decent deal and eventually gave up and started contemplating Trutrac vs. Detroit (been running gov-lock). Recently the thought occurred to me that the way to get an e-locker is to buy an entire rear axle assembly. That's what I did today - the whole rear end (minus only brake calipers) for $200. Found an indoor salvage with 9 to choose from, all on shelves. They just forklift off the pallet into my trailer and away I go. This must be the most screaming deal out there on selectable lockers. Plus I get spare bearings, shims, a 1350 yoke, etc.

To start, I'll re-link the old link links above. It would be cool if some of the old pictures could be re-posted.

https://ck5.com/forums/threads/swap-6-lug-14-bolt-sf-axle-shafts-into-8-lug-sf-did-a-search.63565/
https://ck5.com/forums/threads/14-bolt-sf-6-lug-conversion.170383/
https://ck5.com/forums/threads/converting-sf-rear-from-8-to-6.110216/
 
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