Page 4 of 4 FirstFirst ... 2 3 4
Results 31 to 34 of 34
  1. Collapse Details
    Re: RCV Performance 930 CV plunging axle
    #31
    Senior Member
    Join Date
    Nov 2007
    Location
    Fort Worth Texas
    Posts
    565
    Default
    The drive flange is not damaged, the drive flange only has enough room to handle the plunge in the CV that is why I clipped the axle to the CV at the drive flange. The CV has 1.25 inches plunge at the CV.

    The mid-board as a cup shape cover so the end of the axle is 4.75 inches away from the end of the mid-board hub cover. There are not hit marks on the cover.

    The axle has 3.0 inches of plunge from short distance to full drop. Each CV only as 1.25 inches of plunge so I need 0.6-0.7 axle plunge through the CV inter race. If I clipped the axle to the CV at the mid-board hub I would not have enough plunge.

    The thing that is controlling short distance side to side free play I measured is the CV at the drive flange only has 1.25 of plunge and since the axle is clipped to this CV. So the axle can not move that CV plunge at the drive flange.
    Its not like micro-stubs where you have something the axle can hit on the backside of the CV. So mid-board numbers are not going to look like the normal numbers you see on micro-stubs.

    RCV looked at the axle with a digital magnifying tool and said the CV inter race was grinding up the axle spline and caused the inter race to dig into the axle which was putting a axial load on the axle which caused the failure. They said they have seen this before.

    What I take away from this experience and talking to RCV is I should not of set up my axles planning on the axle spline being able to plunge through the inter race on the CVs. I should of had the axles built so the axle splines are only wide enough to trap the CV inter races with clips so the axle can not plunge through CV inter races on both ends of the axle. So all my plunge would be handled by only the CV joint , there is only 1.25 plunge in each CV joint. I would have had to remove about 4.5 inches of suspension travel out my rear if I only have 2.5 inches of total plunge. If I would have done this I most likely would not have axle breaking problems. Trying to plunge 0.5 inch of axle spline through the inter CV race is the problem, I was thinking that mid-boards are designed to do this, but it causes problems. If the new plunging axles I got do not work out this is what going do next.
    Last edited by stress; 09-01-2015 at 12:29 AM.
    Reply With Quote
     

  2. Collapse Details
    Re: RCV Performance 930 CV plunging axle
    #32
    Senior Member arrowhead's Avatar
    Join Date
    Jul 2008
    Location
    2 minutes from the sand in Florence
    Posts
    337
    Default
    I machined the 930 star .375 deep so my spiralocks will slide inside the cvs on both ends
    Reply With Quote
     

  3. Collapse Details
    Re: RCV Performance 930 CV plunging axle
    #33
    Default
    Quote Originally Posted by stress View Post
    The axle has 3.0 inches of plunge from short distance to full drop. Each CV only as 1.25 inches of plunge so I need 0.6-0.7 axle plunge through the CV inter race. If I clipped the axle to the CV at the mid-board hub I would not have enough plunge.

    .
    This is your problem.

    You designed your suspension so the spline MUST slide thru the CV joint.

    RCV told you their shaft failed because there was excessive sliding between the shaft and CV.
    Reply With Quote
     

  4. Collapse Details
    Re: RCV Performance 930 CV plunging axle
    #34
    The Wizard bdkw1's Avatar
    Join Date
    Jul 2006
    Location
    Easton, KS
    Posts
    4,370
    Default
    Every trailing arm buggy out there has the axle plunging in the star. This should not be an issue. Polishing the splines on both the axle and star goes a long way. With the axle body the same diameter as the splines, the splines will want to twist before the axle body. This will lock up the star on the axle.
    Reply With Quote
     

Page 4 of 4 FirstFirst ... 2 3 4

Similar Threads

  1. 930 axle information
    By stress in forum Axles, Stub Axles
    Replies: 0
    Last Post: 03-28-2015, 09:12 PM
  2. Sway-a-way axle problems
    By stress in forum Driveline
    Replies: 6
    Last Post: 12-26-2013, 04:41 PM
  3. Stretch you solid axle
    By Chikin in forum How To Do It
    Replies: 15
    Last Post: 10-28-2013, 10:02 AM
  4. 930 drive shaft set up (3" plunging?)
    By moto1 in forum Driveline
    Replies: 2
    Last Post: 06-21-2009, 11:18 PM
  5. Replies: 11
    Last Post: 03-05-2008, 09:43 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •