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Clutch ID

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by 72B, Oct 6, 2001.

  1. 72B

    72B Registered Member

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    Have 72 Blazer w/ 4sp. and it has a 11" lever type clutch does anybody know if or what was stock, lever or dia. I cant find the lever type in that diameter, I'm confussed, HELP
     
  2. Blazer1970

    Blazer1970 1/2 ton status

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    I took apart a bone stock '72 with a 350 and SM465/NP205. It had a 12" Borg & Beck (coil spring) clutch. What motor did your '72 come with? I think an 11" Borg & Beck was stock with 6 cyl. or 307. No diaphragm clutches in these trucks that I know of.

    Tim

    70 Blazer CST 4X4 350 SM465 NP205
    87 Burb 4X4 350
    01 GMC 2500HD 4X4 Duramax/Allison
     
  3. blazer72

    blazer72 1/2 ton status

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    11 or 12 inch borg and beck was stock. But you can go with the 12 inch dia use a diffrent bearing, which comes in most clutch kits any way, the Dia is much easyer on the lt foot

    72 Blazer CST 400TPI NV4500 NP203/205
    01 Suburban 2500 4X4 8100
     
  4. Steve_Chin

    Steve_Chin 1/2 ton status

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    I had a 12" Long-style clutch in my Blazer when I bought it. I am now using a Centerforce II diaphragm type clutch in 12". It's much softer in pedal effort than the clutch that was in it (I don't know what it was) and it clamps better. Can't argue with that.
     
  5. 72B

    72B Registered Member

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    It came with a 350, I made the mistake of putting a rebuilt, heavy duty clutch in when I rebuilt the motor and it took 3 men and a boy to push the pedal in, its been miserable for 5 yrs now the springs are falling out and Iwant to make sure I do it right this time. From what I've seen in parts listed for a 350 is all 12" diaphram and the 11" is all 6 cyl and 307
     

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