What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

How to tell the difference in a 14bff & 14bsf

franco802

franco802

1/2 ton status
Joined
Oct 16, 2004
Posts
270
Reaction score
0
Location
San Diego, CA
I might go to the wrecking yard today to look for a 14bff. How the heck can I tell if its a ff or sf?? Any pics I can see, so I don't fug up and get an sf:confused:

Also, to bolt it right in to my K5, should I try to find one from a 3/4 ton?
 
I just read the ID chart descriptions and maybe a little more info is in order. The "small" 14 bolt with the 9 1/2" ring gear is the semi-floating version. The one you want is the big guy with the 10 1/2" ring gear. It's the one with the sort of diamond shaped housing.
 
This is a 14bff hub -

brawler_hub1_small.jpg


This is a good read on 14 bolts.
 
Now what if i find one on a newer truck? Say.....88-94 3/4 pick up? Would it still bolt up with no problems? Brake lines will hook up fine?
 
franco802 said:
Now what if i find one on a newer truck? Say.....88-94 3/4 pick up? Would it still bolt up with no problems? Brake lines will hook up fine?
Click to expand...

Spring perches will be WAY different on the IFS trucks. Stick with 73-88/91.

-- A
 
Steve GMC said:
14ff has this hub
Click to expand...

Awsome!! Thanks!
I been working on cars and have been racing since I was a kid. I always wondered what the bolts in the center of those big rear ends were for:o
 
CDA 455 said:
Is there a 3/4 ton 14bolt FF, and a 1 ton 14bolt FF :confused: :dunno: ? If there is, what is the difference?
Click to expand...
Spring perch width, and/or shock mounting. 1-ton's have the narrower frames and may have weird shock mounts (particularly 2WD, IIRC.)

Also, some 1-tons are DRW; most would be D70's, but post-87's could be a wiiiide 14BFF, and the C&C DRW's are the same axle (just with different brakes and hubs) as an SRW.

Your best bet for a drop-in into a Blazer is a K20 14BFF, i.e. 3/4, 4WD. Anything else, you may have some cutting & welding to do.

Oh, fark ... just saw that you have a first-gen Blazer. I don't know if 73+ axles drop into your frame or not.

-- A
 
dremu said:
Spring perch width, and/or shock mounting. 1-ton's have the narrower frames and may have weird shock mounts (particularly 2WD, IIRC.)

Also, some 1-tons are DRW; most would be D70's, but post-87's could be a wiiiide 14BFF, and the C&C DRW's are the same axle (just with different brakes and hubs) as an SRW.

Your best bet for a drop-in into a Blazer is a K20 14BFF, i.e. 3/4, 4WD. Anything else, you may have some cutting & welding to do.

Oh, fark ... just saw that you have a first-gen Blazer. I don't know if 73+ axles drop into your frame or not.

-- A
Click to expand...

Actually its a 2nd gen. I thought 1st gen was 60's-72?
I have an 86'.
 
dremu said:
Spring perch width, and/or shock mounting. 1-ton's have the narrower frames and may have weird shock mounts (particularly 2WD, IIRC.)

Also, some 1-tons are DRW; most would be D70's, but post-87's could be a wiiiide 14BFF, and the C&C DRW's are the same axle (just with different brakes and hubs) as an SRW.

Your best bet for a drop-in into a Blazer is a K20 14BFF, i.e. 3/4, 4WD. Anything else, you may have some cutting & welding to do.

Oh, fark ... just saw that you have a first-gen Blazer. I don't know if 73+ axles drop into your frame or not.

-- A
Click to expand...

When I bought my 1st Gen., it already had a 14 bolt FF under it. I was just wondering if I had a 3/4 ton or 1 ton 14 bolt FF.

Thanks for the info!
 
You can put a new style 14FF in your rig you just have to change the spring perches. Also some of the later ones came with Disc brakes with the Ebrake being the drum in hat style. They are also wider than the 73-87 14FF.

Ira
 
sandawgk5 said:
You can put a new style 14FF in your rig you just have to change the spring perches. Also some of the later ones came with Disc brakes with the Ebrake being the drum in hat style. They are also wider than the 73-87 14FF.

Ira
Click to expand...

I am going to try and find one from a 73-87.
 
franco802 said:
Actually its a 2nd gen. I thought 1st gen was 60's-72?
I have an 86'.
Click to expand...

69-72. I think I confused you with the OP :)

And I call yours a gen-4 (69-72, 73-75, 76-80, 81-86, 87-91) but that's just me =))

-- A
 
You must log in or register to reply here.

Latest Posts

Top Bottom