Results 1 to 9 of 9

Swapping rear ends

This is a discussion on Swapping rear ends within the Drivetrain forums, part of the LSx Technical Help Section category; I think my rear end needs replaced. I have the 3.23 GU5 option (3 carrier) with ABS and no TCS. ...

  1. #1
    Member vannatte's Avatar
    Join Date
    Jun 2007
    Location
    Noblesville, IN
    Posts
    440

    Black
    1998 Pontiac Trans Am A4

    Swapping rear ends

    I think my rear end needs replaced. I have the 3.23 GU5 option (3 carrier) with ABS and no TCS. Will a 2.73 GU2 (2 carrier) bolt directly on and function exactly the same? I'm not concerned about the 2.73's because I plan on replacing them with 3.73's. Is there any difference in these rear ends except the carriers? A used GU2 rear end seems much easier to come by and is cheaper from what I've seen.
    1998 Trans Am, A4, SLP Loudmouth I, US Exotics WS9 ram air hood, Volant intake, 3.23's, 70k miles

  2. #2
    That guy thearborbarber's Avatar
    Join Date
    Nov 2007
    Location
    SoDak
    Posts
    892

    White over Red
    1991 Suburban

    If you have a rear with the same abs/tcs options as the rear you have already you are golden. I just did a rear swap in mine. I went from 2.73 to 3.42.

  3. #3
    Member
    Join Date
    Nov 2008
    Location
    harrisburg pa.
    Age
    61
    Posts
    868

    black
    02 vette vert

    Quote Originally Posted by thearborbarber View Post
    If you have a rear with the same abs/tcs options as the rear you have already you are golden. I just did a rear swap in mine. I went from 2.73 to 3.42.
    i just caught this post. can you tell me what rpm you are doing now at maybe 70 mph? i assume with the 2.73 it was about 1900, 1950 roughly. thanks. [i also assume you re-did your speedo after the swap]

  4. #4
    That guy thearborbarber's Avatar
    Join Date
    Nov 2007
    Location
    SoDak
    Posts
    892

    White over Red
    1991 Suburban

    2274rpms in OD with the 3.42 gears according my HPTuners scan and 1800 rpms in OD with 2.73 gears. Both at 70mph

  5. #5
    Auto Painter RyanJM's Avatar
    Join Date
    Dec 2007
    Location
    Houston, TX
    Age
    41
    Posts
    2,002

    White
    1998 Trans Am

    Might wanna have the rear check. I have a 98 TA 3.23 3 carrier no tcs and I just damaged the gearsat 70k Got new gears and a rebuild kit from ws6store and it has been ok for about 7k miles now and i do beat on my car, it's a toy for me and I don't really car what breaks. I replaced them with 3.32's since I did alot of hwy but it's going in for 3.73's friday. So check 1st you may not need a rear.
    1998 Trans Am 85k miles.
    Bolt ons, MS3 113LSA cam, Circle D Stall, Tune, Modified WS6 style hood, Full Suspension, 6000k HID's, Clear Side Markers w/ Leds, Led 3rd Brake Light and 18" AR Staggered Killer Wheels w/ BFG KDW NT's.- Weekend Toy/DD
    02 Trailblazer -Sold
    09 Ram 1500 CC - Sold
    09 Cobalt SS/TC - Sold
    13 ram 1500 LoneStar CC 4x4 - Magnaflow, K&N,and more to come-DD/Toy

  6. #6
    Member vannatte's Avatar
    Join Date
    Jun 2007
    Location
    Noblesville, IN
    Posts
    440

    Black
    1998 Pontiac Trans Am A4

    The rear wheels are both slightly pointing inwards according to my mechanic. I believe the axle is actually bent.

  7. #7
    Member vannatte's Avatar
    Join Date
    Jun 2007
    Location
    Noblesville, IN
    Posts
    440

    Black
    1998 Pontiac Trans Am A4

    Does it make a difference if the rear end I get comes from an automatic or manual? I'm having a hell of a time finding 3 channel, 3 series rear end even on Ebay. They all have TCS and I don't want to have to do that mod.
    Last edited by vannatte; 05-04-2009 at 08:05 PM.

  8. #8
    That guy thearborbarber's Avatar
    Join Date
    Nov 2007
    Location
    SoDak
    Posts
    892

    White over Red
    1991 Suburban


  9. #9
    Member vannatte's Avatar
    Join Date
    Jun 2007
    Location
    Noblesville, IN
    Posts
    440

    Black
    1998 Pontiac Trans Am A4

    Thanks. I sent him a message already. Everything for sale on Ebay is 4 channel.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Rear ends going??
    By rkh3 in forum Drivetrain
    Replies: 6
    Last Post: 05-11-2010, 12:31 PM
  2. Rear Ends
    By sloroller in forum General Help
    Replies: 2
    Last Post: 05-09-2010, 12:22 PM
  3. 3rd gen and 4th gen rear ends?? HELP
    By 02bluews6ta in forum Drivetrain
    Replies: 2
    Last Post: 12-11-2009, 03:08 PM
  4. swapping rear end
    By maskedman58 in forum Automatic Transmission
    Replies: 1
    Last Post: 01-11-2009, 04:58 AM
  5. Question: Rear ends
    By JoshuaGrooms83 in forum GTO
    Replies: 22
    Last Post: 07-15-2008, 12:23 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
  •