G80 series limited slip GM Getrag Diff Info - servaasusa/LFX GitHub Wiki

3.42 Ratio G80 series limited-slip:

Getrag Diff 15793754 - superseded now by 25873500 according to

Tools used to pull from 2006 Cadillac 3.6L STS:

  • 21 mm wrench, deep and shallow socket (3x mount bolts, suspension hardware)
  • 18 mm wrench, deep and shallow socket (drive shaft dounut)
  • 13 mm socket (trans tunnel brace)
  • Breaker bar
  • Pry bar
  • ratchet strap (to pull cv axles clear of housing)

Suggested steps for pulling carrier:

  1. Remove exhaust (rubber hangers and 13mm for brace)
  2. Disconnect everything that bolts up to the bottom of the IRS knuckle (21mm)
  3. Swing the knucke and upper arm up and out (shafts can now be popped out with pry bar or big screw driver)
  4. Pull shafts out and clear of housing
  5. Unbolt driveshaft joint (18mm)
  6. Remove 3 bolts (21mm) and lower carrier

Other cars with this diff

https://www.wholesalegmpartsonline.com

  • Cadillac CTS 4DR Base 2005, 2006, 2007
  • Cadillac CTS 4DR HF 2005, 2006, 2007
  • Cadillac CTS 4DR V 2005, 2006, 2007
  • Cadillac STS 4DR Base 2005, 2006, 2007
  • Cadillac STS 4DR V 2006, 2007

G80 series limited-slip GM/Getrag Diff part numbers:

  • 3.23 – 25978162 (supersedes 25862519)
  • 3.42 – 25873500 (supersedes 15793754)
  • 3.73 – 25873497 (supersedes 15793718)
  • 3.91 – 25968531 (supersedes 25858218)

Cheap Front Poly mount

  • cut out rubber but leave metal sleeve in place
  • Use poly 1-3/4" OD Rear From Shackle bushings for Chevy Truck (Energy Suspension 3.2125g)
  • note - Poly bushings and center sleeve will need to be cut down as front mount isn't as deep as shackle holes