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SM465 Durability behind BBC

Discussion in 'The Garage' started by rcamacho, Jan 3, 2007.

  1. rcamacho

    rcamacho 1/2 ton status

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    I'm considering a 465/205 combo as a lower cost alternative to repairing my 4500. - Yeah crazy idea.

    Q: how have the SM465 held up behind BBC's? 32 spline combos are very rare and I'm concerned about blowing 10 spline couplers or mainshafts.
     
  2. jays68yak

    jays68yak 1/2 ton status

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    I have a 10 spline 465 behind a 454. Behind the 465 is a doubler. So far so good, but its only been one trip.
     
  3. draggbody

    draggbody 1/2 ton status

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    i rape my 465 w/ my 454... i have broke a t-case adapter, but no tranny, t-case problems...
     
  4. 454k30

    454k30 1/2 ton status GMOTM Winner

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    darn near unbreakable, i'm sure this is why they came stock behind BBCs for so many years. They do have the drawback of no overdrive though. Bada** low 1st gear, but not good highway gearboxes
     
  5. blazinzuk

    blazinzuk Buzzbox voodoo Premium Member GMOTM Winner

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    I have heard of alot of poeple breaking the t-case adaptors but never the trans behind big blocks
     
  6. supersize75k5

    supersize75k5 OrganDonorRacing.com

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    i have also seen one used like a damn race car..

    buddy of mine abused the hell out og it..no breakage:D
     
  7. 5280k5

    5280k5 1/2 ton status

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    So far so good with mine and let's just say I don't go easy with the skinny pedal:D But I would think of this as a downgrade if you're used to a nv4500, I only dream about a fifth gear as I cruise the highway at 2600 rpm.....
     
  8. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Yeah and rcamacho's truck has 4.56's and last I saw 33's...which puts the cruise rpm at 3017 rpm at 65 mph without overdrive. :eek1: :eek1:

    Rene
     
  9. MattK

    MattK 1/2 ton status

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    yeah durability is no issue. driveability is what i'd be worried about
     

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