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Old July 29th, 2012, 12:00 PM   #1
CheapThrillB2
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Default 14 bolt shaft differences

Okay I cannot find the sale thread where I purchased my 14 bolt back in 09. And I didn't appear to say what it was from in my build thread at the time.

Memory serves me I recall it being a 87 3/4 ton suburban axle. My housing doesn't have the ribs and I recall ordering the older crush sleeve when I set up the gears.

Well I broke the RR last weekend, went to LKQ and pulled a early 90's pickup shaft and it was to short. Returned it and found a 95 one ton van and pulled that shaft. Near as I can tell its the same length. Hard to tell with the broken shaft comparing to a not so broken shaft. However the van shaft doesn't seem to wanna slide all the way into the carrier. I get about .250-.500 away from the hub flange and it seems to stop. Feels like the splines start to engage and then stops. Tapping on it doesn't seem to drive it in any further. The old shaft came out decent once I could get a grip on it to pull it out. Looking at the van shaft vs my old shaft the splined ends seem slightly different. Van shaft has more of a taper to the end of the shaft where my old one is more blunt.

Is there a difference in shafts that they won't interchange? You can see in the splines where the engagement was and see its different depths. Mine is a 4.10 gov lock carrier, no idea what the donor van was.


Last edited by CheapThrillB2; July 29th, 2012 at 12:09 PM.
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Old July 29th, 2012, 02:56 PM   #2
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the ones in mine and my spares look like the bottom one.mine were both out of late 70's truck.75 width i think. so measure your width john and it should be any 14 bolt in that width.

Last edited by liv2mx; July 30th, 2012 at 12:52 PM.
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Old July 29th, 2012, 03:33 PM   #3
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Not sure if this will help you.

http://www.pirate4x4.com/tech/billavista/14b_bible/
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Old July 29th, 2012, 03:56 PM   #4
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I read through the bible, didn't really read much on the shafts and interchange.
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Old July 30th, 2012, 08:53 PM   #5
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Quote:
Originally Posted by CheapThrillB2 View Post
Memory serves me I recall it being a 87 3/4 ton suburban axle.

Returned it and found a 95 one ton van and pulled that shaft.
IIRC, when they went to the slip-on drums around 1990 the shaft changed length slightly.

Best bet would be to find something from 1973-1987.
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Old July 30th, 2012, 08:59 PM   #6
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10-4 thats my hope sometime this week. Gonna get over to weller u-pull it and hope they have something that old.
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Old July 30th, 2012, 09:14 PM   #7
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Got a complete one out of a 82 3/4 ton.
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Old July 31st, 2012, 05:57 AM   #8
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looks like vans are differant. Looks like your splines were enguaged more. are the splines on the new shaft wore and binding where they havn't rode before?


From the 14 bolt bible.



The different types of 14 bolt.There are many different 14 bolt axles available, with an almost dizzying array of possible widths, tube OD's, hub types, brakes etc. Fortunately, all are pretty similar, a huge number of parts interchange, and through the power of the internet and Pirate4x4.com we are beginning to catalogue all the available data here.*CAUTION* - With this axle, as indeed with all things "axle" like - there are no hard and fast laws - for every "fact" I shall present, I know there's at least one person out there, maybe many more, who claim they own or know of exceptions. This is very likely true and due to the way in which oem vehicle construction occurs, can not be avoided or completely resolved.What follows is what i believe to be true, or the most correct, information based on the research I have done and the letters I have received from what I judge to be the most reputable sources. Use the data with caution - "your mielage may vary" as they say.14 Bolts can be broken down into 4 broad groups. There is also at least one year break that bring minor changes, but this is in fact far less significant than the "type" of 14 bolt axle in question.

Once again - this article is concerned only with GM 14 Bolt full-float rear drive axles. With that said, the following table attempts to capture the data.

TypeWidth WMS-WMSTube OD / ThicknessApplicationsHubs* Shafts**
SRW
(single rear wheel truck)

67.5" 3-3/8" / 0.5"Type A Type 1
DRW
(dual rear wheel truck)72"3.5" / 0.5"Type B Type 2
C&C
(cab and chasis truck)

63.5"3.5" / 0.5"Type B Type 1
Van70"G30 and G35Type A Type 3

Notes:

The SRW and C&C axles use the same housings and shafts, with the difference in width being in the hubs. The housings are actuallly identical except for the location of the backing plate flange. Drums & hubs are different, but backing plates, shoes, and wheel cylinders are the same) * The SRW and Van axles use the same hubs, the C&C and DRW axles use the same hubs; Though different, the SRW/Van hubs and the C&C/DRW hubs can be interchanged causing a change to the axles WMS (see pics below) SRW and C&C axle shafts are the same ** Van, DRW, and SRW/C&C axle shafts are all different lengths as follows (long/right side / short/left side):
Type 1 - SRW/C&C - 37-5/8" / 31-5/8"Type 2 - DRW - ??
Type 3 - Van - 39-3/8" / 33-3/8"
C&C and dually brakes are the same.In all cases one side axleshaft is shorter than the other; pinions are centered. 1350 appears to be the only available stock pinion yoke.1-tons feature 40.5" perch spacing - whether C&C or pickup, whether SRW or DRW. 3/4-ton is 42.5" spacing. (COUNTER) - The perchs on my C&C measure 36"Wheel studs went metric for the 88-up C/K trucks, and 96-up vans
Front 60 and rear 14b spindles have the same bearing spacing and same bearing journal sizes. Seal journal is different
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Old July 31st, 2012, 10:25 AM   #9
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Having a hard time finding 87 older axles in the upullit yards. Plus with not having a day off this week and trying to get it fixed by sunday doesn't help .

Napa lists a shaft for $364
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Old July 31st, 2012, 10:30 AM   #10
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Would the suburban be considered the cab and chassis or the van axle
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Old July 31st, 2012, 10:46 AM   #11
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if you need one john you can have my spare just replace it.
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Old July 31st, 2012, 11:01 AM   #12
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Time for some double spline floater shafts.
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Old July 31st, 2012, 11:03 AM   #13
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Kyle is gonna look at his tonight, hes closer
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Old July 31st, 2012, 06:38 PM   #14
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Looks like from the back of the flange to the end of the splines my shaft is close to 37.750.

So I must have the 37 5/8 shaft. The shaft in the pic above looks real close to 38"s
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Old July 31st, 2012, 06:56 PM   #15
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so did you find one? i just went by kyles a few hours ago.
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Old July 31st, 2012, 06:58 PM   #16
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Not Yet
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Old August 1st, 2012, 07:06 PM   #17
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Did that shaft work?
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Old August 1st, 2012, 07:09 PM   #18
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Yep now to find two more just like it and another for the other side
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Old August 1st, 2012, 08:18 PM   #19
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Did it slip right in? Or did you have to tap it in?
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Old August 1st, 2012, 08:24 PM   #20
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Slid right in.
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