Results 1 to 8 of 8

1980 trans am rear end

This is a discussion on 1980 trans am rear end within the LSx Retrofit and Swap forums, part of the LSx Technical Help Section category; I just had a ls dropped in my 80 TA Now the rear end seems messed up, I want to ...

  1. #1
    Junior Member
    Join Date
    May 2016
    Location
    flower mound
    Posts
    2

    Black
    1980

    1980 trans am rear end

    I just had a ls dropped in my 80 TA Now the rear end seems messed up, I want to change it out to something with disc breaks maybe with 373 gears any ideas what donor would fit? Thank you all

  2. #2
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,201

    Navy Blue Metallic
    98 T/A w/a little mods...

    Do you know what's wrong? Slipping or broken teeth on the gear, howling?

    These above are relatively simple in that depending on what the issue is what needs to be done to rebuild it.


    Now if you're looking to beef it up and and a built rear end you have several options but some of your problems are going to be suspension setup, particularly working with the leaf springs.

    Do you not bother with a stock 4th gen rear, they are weak and not worth building up.


    Several companies out there that build rears in Ford 8.8, 9", and GM 12 bolt are the most common. Dana60 is if you're super serious about track.


    Regarding the disk brake conversion, there are plenty of kits that you can convert to. IIRC you can even get the stock rear setup from a 4th gen and use on your car.

    I have fab a 8.8 for mine. So far so good.

  3. #3
    Senior Member Whamhammer's Avatar
    Join Date
    Sep 2010
    Location
    Bel Air, Maryland
    Posts
    1,077

    Silver
    '02 Trans Am WS-6, 6M

    Quote Originally Posted by SMWS6TA View Post
    Do you know what's wrong? Slipping or broken teeth on the gear, howling?

    These above are relatively simple in that depending on what the issue is what needs to be done to rebuild it.


    Now if you're looking to beef it up and and a built rear end you have several options but some of your problems are going to be suspension setup, particularly working with the leaf springs.

    Do you not bother with a stock 4th gen rear, they are weak and not worth building up.


    Several companies out there that build rears in Ford 8.8, 9", and GM 12 bolt are the most common. Dana60 is if you're super serious about track.


    Regarding the disk brake conversion, there are plenty of kits that you can convert to. IIRC you can even get the stock rear setup from a 4th gen and use on your car.

    I have fab a 8.8 for mine. So far so good.
    The 1980's still had a 8.5 inch rear, probably just beefing it up with some good parts, and adding on a rear disk brake conversion would probably get the job done nicely.

  4. #4
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,201

    Navy Blue Metallic
    98 T/A w/a little mods...

    I haven't had the "pleasure" of working on one yet. That's why I asked what was wrong with it. If it's slipping that's easy to fix, broke ring gear, again easy.

  5. #5
    Giant Dicks Car Club Zapper2003's Avatar
    Join Date
    Nov 2006
    Location
    Millerton, PA
    Posts
    5,103

    2005 Ram
    1978 Firebird

    1980 trans am rear end

    as was stated, the 80's 10 bolt rear had an 8.5" ring gear, perfectly fine for stock ls power. gearsets for it are easy to find, as are aftermarket differentials. Right Stuff Detailing sells a very affordable disc brake conversion that's simple to install, especially since the axles have to be pulled to correct whatever the issue may be.

  6. #6
    Junior Member
    Join Date
    May 2016
    Location
    flower mound
    Posts
    2

    Black
    1980

    It's making a popping sound and some grinding as well mostly when turning at low speed . It would seem to have low gears as it doesn't jump off the line but curses at 55 at really low rpm.
    So I was hoping to just pop in a whole another rear end in but doesn't sound like there is a fit. I'm not a racer this is a driver and weekend fun.

  7. #7
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,201

    Navy Blue Metallic
    98 T/A w/a little mods...

    1980 trans am rear end

    Sounds like bearings
    http://www.ls1.com/forums/f7/my-6-liter-build-174257/

    http://www.ls1.com/forums/f8/my-8-8-rear-build-165553/

    6.0L Block - Forged 403 built, breaking it in , Polluter Stg3 Cam, FAST 102mm Intake, NW102 TB, MSD wires, NGK TR6 plugs, Truck Coil Packs, LS3 Fuel Injectors, CC Pacesetter LT Headers, TS&P ORY, QTP e-Cutout, Magnaflow Muffler, 104mm Air Lid & Line Lock, Catch Can, Stage 2 T56, PRO 5.0 Shifter, Tick MC, Monster Stg 4 Clutch, QT SFI BH, MWC DSL, UMI: SFC, PHB, LCA's, LCA Relocation Brackets & TA, Hotchkis Springs (1" Drop), YR1 Snowflake Wheels wrapped in NT555 tires & Custom Fab Ford 8.8 rear w/4.10 Yukon Gears, WSQ Hood, 3"CM Strange Eng Drive Shaft.

    Horsepower never lies, but is often lied about!

  8. #8
    Giant Dicks Car Club Zapper2003's Avatar
    Join Date
    Nov 2006
    Location
    Millerton, PA
    Posts
    5,103

    2005 Ram
    1978 Firebird

    1980 trans am rear end

    the is a bit more to it than just swapping the rear out in favor of disc brakes, too. you will also need a disc brake master cylinder and proportioning valve. to make matters worse, I have read on more than one account that the factory disc setup wasn't very good, and when compared stock for stock against drums, they're pretty much on the same playing field and neither one is better than the other.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 1980 Pontiac Trans Am promo
    By blk99ws6ta in forum Firebird / WS6
    Replies: 1
    Last Post: 09-01-2012, 11:40 AM
  2. 1980 Trans Am (Again)
    By SHines-IT in forum Almost Anything Goes
    Replies: 68
    Last Post: 02-03-2010, 05:27 PM
  3. 1980 Trans Am
    By SHines-IT in forum Almost Anything Goes
    Replies: 91
    Last Post: 10-13-2009, 09:28 PM
  4. 1980 Pontiac Trans Am - Shootout
    By Ed Blown Vert in forum Firebird / WS6
    Replies: 0
    Last Post: 10-09-2009, 12:11 AM
  5. 1980 trans am for trade
    By jim mullen in forum Vehicles For Sale / Trade
    Replies: 1
    Last Post: 10-31-2006, 05:54 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
  •