Results 1 to 7 of 7

Thread: diff conversion

  1. #1
    Ride
    VB Commodore

    Join Date
    Jul 2011
    Location
    Sydney
    Posts
    6

    Default diff conversion

    i just bought myself a vk diff with disk brakes to put into my vb. Its just a standard non lsd diff but i just wanted to make sure there was nothing i needed to change. I was told something about having to change the brake master cylinder because of the disks. could someone please clarify.

    Also the diff is complete minus a handbrake cable, could i use the stock handbrake cable from my diff or not?

    Cheers
    James

  2. #2
    Ride
    holden vs

    Join Date
    Mar 2010
    Posts
    46

    Default

    yes master cylinder will need changing i have a disc diff in my wagon but havent change master cylinder yet (as car is still a project in the shed not on road) and yea car dosnt stop very well lol as for hand brake cable i thank they are different but i havent got there yet lol
    Built with Spanners. Not chops sticks

  3. #3
    Ride
    VC

    Join Date
    Oct 2008
    Posts
    170

    Default

    Handbrake cables are different and you need to replace the 15/16" master cylinder with a 1" unit.

  4. #4
    Ride
    Black VK Calais 333 Pack

    Join Date
    Jul 2009
    Location
    Melbourne - SE
    Posts
    323

    Default

    Some later VKs ran the Borg Warner diff. You may have to change the rear half of the drive shaft as well. If your car had drums then you will need to change the handbrake cable.

  5. #5
    ari666's Avatar
    ari666 is offline captain halfajob
    Ride
    1966 impala

    Join Date
    Mar 2009
    Location
    melbourne
    Posts
    6,496

    Default

    Quote Originally Posted by NPreston View Post
    you need to replace the 15/16" master cylinder with a 1" unit.
    i have heard a lot of people saying that, which is weird cos' my V8 VK which is an L32 so factory V8 is running a 15/16's master (from factory) and obviously it has 4 wheel disc brakes.

    so yeah, master cylinder change is unnecessary. mine works fine.

  6. #6
    Ride
    VC

    Join Date
    Oct 2008
    Posts
    170

    Default

    Quote Originally Posted by ari666 View Post
    i have heard a lot of people saying that, which is weird cos' my V8 VK which is an L32 so factory V8 is running a 15/16's master (from factory) and obviously it has 4 wheel disc brakes.

    so yeah, master cylinder change is unnecessary. mine works fine.
    Forgot I also upgraded to VT brakes, that's why I changed master cylinder.

  7. #7
    Ride
    VK SL 5spd

    Join Date
    Sep 2009
    Location
    Wagga Wagga
    Posts
    1,114

    Default

    Quote Originally Posted by ari666 View Post
    i have heard a lot of people saying that, which is weird cos' my V8 VK which is an L32 so factory V8 is running a 15/16's master (from factory) and obviously it has 4 wheel disc brakes.

    so yeah, master cylinder change is unnecessary. mine works fine.
    There is two types of 15/16 master the drum and disc style, my factory 308 also has the 15/16 with discs, drum masters have a residual pressure valve and a biased a bit differently as drums require fark all pressure to work compared to discs.

Similar Threads

  1. need help!! 9 inch diff conversion
    By norman89 in forum V8 Development and Modification
    Replies: 2
    Last Post: 14-08-2010, 12:50 PM
  2. VL LSD diff conversion
    By 05 Senator in forum VL Holden Commodore (1986 - 1988)
    Replies: 2
    Last Post: 20-07-2010, 03:17 PM
  3. diff conversion
    By vkhawkey in forum VB - VK Holden Commodore (1978 - 1985)
    Replies: 5
    Last Post: 02-01-2008, 02:04 PM
  4. vr to vb diff conversion
    By oldenvb in forum General Discussion
    Replies: 5
    Last Post: 09-05-2006, 02:57 AM
  5. VLT diff or disc conversion
    By Snowfox in forum VL Holden Commodore (1986 - 1988)
    Replies: 8
    Last Post: 28-10-2004, 06:16 PM

Posting Permissions

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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71