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Its only taken about 8mo for the write up! S/F 14 & Disc Conversion!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Corey-88K5, Jan 20, 2001.

  1. Corey-88K5

    Corey-88K5 1/2 ton status

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    Here it (mostly) is! I still have some pic's, but I can't seem to find it on my sites. Here is about 90% of it. I've also got a bunch misc. information about this, to include tools/sizes and spec's on the axle. Also, I know that the 3ed pic is a dead link. Thanks...

    <A target="_blank" HREF=http://www.geocities.com/corey_perez/discbrakes.htm>http://www.geocities.com/corey_perez/discbrakes.htm</A>

    Corey
    88K5

    [​IMG]<font color=red>Girls Like Guys In Bow Ties
    <A target="_blank" HREF=http://www.geocities.com/corey_perez>http://www.geocities.com/corey_perez</A><P ID="edit"><FONT SIZE=-1>Edited by Corey-88K5 on 01/20/01 10:55 AM (server time).</FONT></P>
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Nice job Corey! Very informative.

    Rene

    [​IMG]
     
  3. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>Looks good. In the reveiw, you said you switched to non p-brake calipers. What are you doing about the p-brake? I would like to switch to non-eldo calipers on my rear since I already have an extra set of front calipers.</font color=blue>

    [​IMG]
    <font color=blue>pavement queen with shinny paint job and car tires</font color=blue>
     
  4. Goose

    Goose 1/2 ton status

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    Good, detailed article. I don't plan on doing this conversion anytime soon, but was still good reading.

    [​IMG]
     
  5. WARP1

    WARP1 Registered Member

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    I plan to do a similar swap on my Blazer. Only I plan to start with an older 8-lug 14SF axle and swap out the 8-lug axles for 6-lug axles. Then I'll add the disc brakes. Anyone know if this will work. I just don't want to swap spring pads, and an older 8-lug should be cheaper.
     
  6. K5-Kowboy

    K5-Kowboy Registered Member

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    Well done Corey...lot's of great info there.

    [​IMG]<font color=blue> K-5 Kowboy </font color=blue>[​IMG]

    Go Through It or Go Over It....Going around is NOT an option.
     
  7. Texan

    Texan 1/2 ton status

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    Just curious why you chose to use your stock driveshaft and trick u-joint when you could've had the 3/4 ton driveshaft cut down to fit? Also, do you have your t-case lowered or were you able to match the angles when you rewelded the perches with it in the stock location? Lastly, did you change the shock mounts or use them as is? I have the same diff. out of a 91' Chevy 2500 including the drive shaft and will be making the swap into my K5 in the next couple of weeks so it's good timing to pick up a few tips before diving in...

    Thanks For The Info.,

    <font color=orange>STEVE<font color=orange>[​IMG]
    89 Blazer
    67 Camaro 468
    68 CamaroSS 327
    98 GTP
     
  8. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>Hey WARP1, your idea will work. The only difference between the 8 lug and 6 lug SFs is the shafts and drums. The housing will bolt up if you get it from a pre-88 pickup or a pre-92 burb. </font color=blue>

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  9. shum1

    shum1 1/2 ton status

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    Why SF vs FF? Just curious.
     
  10. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>GM made 2 versoins of the 14 bolt axle. One was 10.5" ring gear with full-float shafts (ff) and the other was 9.5" ring gear with the c-clip semi-float design (sf). The SFs are becoming more popular because they're lighter than the ff's, have a little more clearance and you can still use 6 lug 15" rims.</font color=blue>

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    <font color=blue>pavement queen with shinny paint job and car tires</font color=blue>
     
  11. Logan

    Logan Registered Member

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    About the no parking brake problem: A friend of a friend of mine used to drag race his old Chevy Nomad -- It had a system to lock the front wheels during burnouts. He'd stand on the brakes, flip a toggle or something, let go, and the front brakes would remain locked while he melted his rear tires. No idea what's involved in the system, or how it worked, but it might be something to look into.

    -Al.

    -Al.
     
  12. They're called line locks.
     
  13. HarryH3

    HarryH3 1 ton status Author

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    Line locks technically aren't legal for use as a parking brake. The parking brake is supposed to be totally mechanical, so it will still work in the event of a complete hydraulic failure. A slow leak in a line lock could also mean that your vehicle is not where you parked it when you return. [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
     
  14. Corey-88K5

    Corey-88K5 1/2 ton status

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    The reason I used a trick U-joint as opposed to a new shaft was cost. There wasn't any reason for me to switch driveshafts, the one I had was a CV Style, and worked perfectly. As far lowering the T-case. I don't believe in doing that. There isn't any reason to raise a vehicle and lower the lowest break over point on the vehicle. So, I won't lower any T-cases on my vehicles. I"ll correct the drive line issues else where.

    And lastly, I had to reposition the shock mounts. I used the stock ones off the 10bolt axle though. I don't remember if there was a reason, or if I just did it because. I think they were smaller for some reason. Smaller in the means as being closer to the axle.

    Corey
    88K5

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  15. Corey-88K5

    Corey-88K5 1/2 ton status

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    As far as the P-brake, currently I don';t have one. I'm considering a Driveshaft mounted parking brake. I haven't really worried about it yet. But as the truck sits right now, there isn't any parking brakes on the truck.

    Corey
    88K5

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  16. Corey-88K5

    Corey-88K5 1/2 ton status

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    S/F vs F/F? Simple...

    GROUND CLEARANCE! I don't see much of a benifit of the FF vs. SF. The axles are worlds larger then the 10's and 12's. I don't know how much stronger they are, but I know they are. I am not worried abuot the breakage, I'm sure the S/F will hold up perfectly.

    Corey
    88K5

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  17. Texan

    Texan 1/2 ton status

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    Corey,

    Thanks for the info! If I had a CV driveshaft I probably wouldn't change it out either. I agree with you on giving up ground clearance, however, I'm just not sure that with the angles I'll have (2" Tuff Country rears with shackle flip) that I will be able to avoid dropping the t-case and turning the pinion up a bit when I weld the perches due to clearance between the driveshaft and yoke ends...

    <font color=orange>STEVE<font color=orange>[​IMG]
    89 Blazer
    67 Camaro 468
    68 CamaroSS 327
    98 GTP
     
  18. Corey-88K5

    Corey-88K5 1/2 ton status

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    When I sarted my swap I ended up needing to use lift blocks. Currently I have a homemade shackle flip w/ 2" blcoks. I don't have any problem, but I am using a CV Shaft as previously stated. I'm looking forward to getting new springs all aound. i just settled a deal for 5 TSL Boggers: 35x16 15" wheels/. All 5 for $650.

    Looks like I'm going to need a bigger lift to clear those tires that big and wide.

    Corey
    88K5

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