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Can a 1 piece drive shaft be too long?

Discussion in 'The Garage' started by divorced, Feb 12, 2006.

  1. divorced

    divorced 3/4 ton status

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    What's the length limit on a 1 piece driveshaft before a 2 piece unit is needed?



    .
     
  2. K5Chris

    K5Chris 1/2 ton status

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    68-70" or so. but maybe jesse or another expert might have a different opinion....
     
  3. DEMON44

    DEMON44 Low-Tech Redneck

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    its 6 or 8' before a steady bearing and 2 pieces is needed. I just don't recall if its 6 or 8. I think 6'.
     
  4. Zeus33rd

    Zeus33rd Smarter than you GMOTM Winner

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    The longest one I've ever put together at HAD was about 5'. After that they become a pain in the ass to balance. I don't think Jesse will do a 1 piece over 6'.
     
  5. divorced

    divorced 3/4 ton status

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    Cool, thanks guys.
     
  6. greywolf

    greywolf 1/2 ton status

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    the 1 i have is 64" long no probs yet
     
  7. 1985_K5_Silverado

    1985_K5_Silverado 1/2 ton status

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    Well, it depends partly on how fast you intend to spin and the mass of the shaft, as well as the length. Crown Vic cop cars have some mighty long driveshafts for a car that can have a 3.55 rear end and a top speed of about 150mph. Because of this, they use a lighter shaft (than those used in the non-P71 cars) so the shaft won't try and shake itself to bits at top speed.
     
  8. diesel4me

    diesel4me 1 ton status Premium Member

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    How long is my shaft??

    Longest one peice driveshaft I have owned /seen so far,is the one in my 81 G10 Van with a 125" Wheelbase..its either 69 or 70-1/2" long,I forget which..only reason I know is I had a hell of a time finding one that a forkloader hadn't squashed already at several junkyards, when my i discovered my original one had a big dent in it,and it vibrated some at 65-70 mph..:doah:


    I'd think any longer than that, and it would bow in the middle under torque!..:eek1:
     

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