CK5
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What was the first year for the 14 bolt SF 8 lug axle?
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Masiony
1/2 ton status
The "small" GM 14-bolt has a 9 1/2-inch ring gear diameter. It was used in the rear of 1964-and-later GM pickups, and in the rear of 1984-91 3/4-ton Suburbans.
i found this in the "tech article" section of this site. next time use a little effort and search.
Masiony said:
Hey pal, I'm doing good to find the garage, let alone some tech article!
And FIY, I did try to search the forums, but "sf" is too short of a term, and Google was little help. So, I did use a little effort... but I'm just not as sharp as some.
Thanks for the info, though.
I'm going back to the Lounge now.
Slapperbar
Retired Navy NDT Examiner
Noob flaiming the Vet. Wow.
Masiony said:GM CORPORATE 14-BOLT
The "small" GM 14-bolt has a 9 1/2-inch ring gear diameter. It was used in the rear of 1964-and-later GM pickups, and in the rear of 1984-91 3/4-ton Suburbans.
i found this in the "tech article" section of this site. next time use a little effort and search.
I'm not sure that '64 is correct. My guess is closer to '81 or so.
And chill with the attitude jackass. This not the place to flame people for not searching, thats Pirate style. Did you forget where you are?
Yeah, I'm going to say 1982 was the first year for the 14SF.
Nothing before it but the 10/12 bolt and 14FF. 60 even earlier, correct?
Nothing before it but the 10/12 bolt and 14FF. 60 even earlier, correct?
I'll back up that 1964 is wrong also . I believe it was 1981/1982 when GM first used it as well.
Tom
Tom
R77K10
Banned
64 is VERy wrong
was 81/82
was 81/82
neverendingproject
1/2 ton status
I would have to agree with the 1982. I pulled mine out of a 83, but I think the first year was 1982 or 1981.5
neverendingproject
1/2 ton status
Wait a sec.... im in college. 
3 on the tree
1/2 ton status
Eaton rearends were used B4 GM came out with the 14 SF. I think it was EO 52 for the 3/4s and EO 72 was the next step up. I have pulled these rearends out of a bunch of 1st gens, even Burbs.
Yeah, first gens, but that ended in '72. I'd guarantee there are no 14SF's prior to, oh say, 81.5. 
I like that number.
I like that number.
big83chevy4x4
3/4 ton status
i have an 81 that has the 14bsf. never seen them before then.
I asked this same question before and everyone told me '81 was the first year. So, I guess I have to say they're right. 
Kevin
Kevin
I concur. Of all the trucks I've bought and dismantled, '81 marks the first year of the SF. End of story. Find another n00b to bash now.big83chevy4x4 said:
atho
1/2 ton status
GM did use the Eaton H0 rearends before the 14 bolt, the H052 was the 3/4 ton version and the h072 was the 1-ton version. I'm pretty sure that no 3/4 tons had semifloat axles until '81, either.3 on the tree said:
There was a semifloat Eaton-style axle used before the 12 bolt, but its a fairly rare animal. EDIT: only in half tons.
