1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Driveshaft lengths

Discussion in '40- & 55-Series Tech' started by CruisinGA, May 31, 2003.

  1. CruisinGA

    CruisinGA

    Messages:
    6,163
    Likes Received:
    8
    Joined:
    Mar 27, 2003
    Location:
    Georgia Tech
    Did driveshaft length change between the '74 3spd and the '74 4 spd? If so would any set of 4 spd driveshafts work despite the '74 4 spd being on a F engine? ???
     
  2. CruisinGA

    CruisinGA

    Messages:
    6,163
    Likes Received:
    8
    Joined:
    Mar 27, 2003
    Location:
    Georgia Tech
    come on, SOMEONE has to have put a 4 spd in a pre 74 cruiser?? I guess If they aren't, I could always cut them and lengthen/shorten them. ??? But if that has to happen, then it makes the SM420 seem like not so much more work.
    Decisions, decisions... ??? :dunno:
     
  3. Pin_Head

    Pin_Head

    Messages:
    13,731
    Likes Received:
    1,297
    Joined:
    Feb 6, 2002
    Location:
    OC, CA
    Yes, the toy 4sp is about 2 inches longer than the 3sp, so the 4sp rear shaft is 2 inches shorter and the front 2 inches longer.

    The sm420 is about 1 inch longer than the 3sp, so you may be able to use a 3sp shaft in the rear and a 4 sp shaft in the front (with a 4sp diff flange), especially with a 4 inch lift.