1-800-682-1290 Test@defeomfg.com
SAVE 5% on your first parts order at checkout
Xcalliber logo
Parts for Allison®
Renewed Allison® Transmissions

GM DURAMAX PARTS

  • Allison® 1000

  • Allison® 10L1000

COMMERCIAL PARTS

  • Allison® LCT 1000 / 2000 / 2500

  • Allison® MD / B300 / B400 / 3000 / T200

  • Allison® HD / B500 / 4000RDS / T400

  • Allison® AT 540 / 542 / 545

  • Allison® MT 643 / 644 / 653 / 654

  • Allison® CT / CLBT / HT-700

  • Allison® V730 / 731

  • Allison® TT / Twin Disc

  • Allison® CLT 3461 / Terex

  • Allison® 4000 Off-Highway

  • Allison® 5000 / 6000

  • Allison® 8000 / 9000

  • Allison® TX-100 / Military

  • Allison® Torque Converter

  • Allison® Hybrid H 40 / 50 EP

Allison® 1000 | 5 Speed + 6 Speed

STOCK

PERFORMANCE

Allison® 10L1000 | 10 Speed

STOCK

PERFORMANCE

Allison® LCT 1000 / 2000 / 2500

Allison® MD / B300 / B400 / 3000 / T200

Allison® HD / B500 / 4000RDS / T400

Allison® AT 540 / 542 / 545

Allison® MT 643 / 644 / 653 / 654

Allison® CT / CLBT / HT-700

Allison® V730 / 731

Allison® TT / Twin Disc

Allison® CLT 3461 / Terex

Allison® 4000 Off-Highway

Allison® 5000 / 6000

Allison® 8000 / 9000

Allison® TX-100 / Military

Allison® Torque Converter

Allison® Hybrid H 40 / 50 EP

Parts for Allison®
GM DURAMAX PARTS
Allison® 1000
Allison® 10L1000
COMMERCIAL PARTS
Allison® LCT 1000 / 2000 / 2500
Allison® MD / B300 / B400 / 3000 / T200
Allison® HD / B500 / 4000RDS / T400
Allison® AT 540 / 542 / 545
Allison® MT 643 / 644 / 653 / 654
Allison® CT / CLBT / HT-700
Allison® V730 / 731
Allison® TT / Twin Disc
Allison® CLT 3461 / Terex
Allison® 4000 Off-Highway
Allison® 5000 / 6000
Allison® 8000 / 9000
Allison® TX-100 / Military
Allison® Torque Converter
Allison® Hybrid H 40 / 50 EP
Renewed Allison® Transmissions
GM Duramax Trucks
Commercial Vehicles
Surplus Allison® Parts
Virtual Parts Catalog
Merchandise
Sign In Reorder
Call
800.682.1290		 Email
Parts@Xcalliber.com
GM Duramax Trucks
Sign In Reorder
Call
800.682.1290		 Email
Parts@Xcalliber.com
close

Xcalliber Sign-In

New customer? Create an account.

Forgot password?

close

Create an Xcalliber Account

Already have an account? Sign in.

Register

Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy.

By creating an account, you agree to Xcalliber’s Privacy Policy and Terms and Conditions.

close

Reset Password

Remembered password? Go back to Sign-In.

Lost your password? Please enter your username or email address. You will receive a link to create a new password via email.

PERFORMANCE REBUILD KITS

Allison Transmission Rebuild Kits for Performance

Xcalliber’s Allison transmission rebuild kits for performance applications are for Duramax owners who demand more than stock capacity can deliver. These kits are purpose-built for modified trucks running at elevated power levels. They contain upgraded clutch packs, hardened components, and friction materials capable of handling serious torque. Allison 1000 transmission rebuild solutions at this level are designed alongside Xcalliber’s billet shafts, performance valve bodies, and high-stall torque converters for a fully capable performance drivetrain.

Manufactured in-house in Brookfield, Connecticut, our performance kits reflect decades of Allison-specific development since 1984. Whether you’re building a street truck or a competition-ready Duramax, our Allison transmission rebuild components can support builds well into 800+ HP territory. Choose Xcalliber for US-made, engineer-designed performance parts.

ALLISON® 1000 GM | DURAMAX - Performance Parts

shop loop alter small grid
  • 29547606-XX

    29547606-XX

    REBUILD KIT - 1K W/ PERFORMANCE...
    REBUILD KIT - 1K W/ PERFORMANCE UPGRADES (LML & L5P) (XX-RATED)
  • 29547606-X

    29547606-X

    REBUILD KIT - 1K W/ PERFORMANCE...
    REBUILD KIT - 1K W/ PERFORMANCE UPGRADES (LML & L5P) (X-RATED)
    Quick View
  • 29547606-XXX

    29547606-XXX

    REBUILD KIT - 1K W/ PERFORMANCE...
    REBUILD KIT - 1K W/ PERFORMANCE UPGRADES (LML & L5P) (XXX-RATED)
  • 29545312-XXX

    29545312-XXX

    REBUILD KIT, 4TH GEN - 1K W/...
    REBUILD KIT, 4TH GEN - 1K W/ PERFORMANCE UPGRADES (LBZ/LMM) 2006-2010 (XXX-RATED)
  • 29545311-XXX

    29545311-XXX

    REBUILD KIT, 5 SPEED - 1K...
    REBUILD KIT, 5 SPEED - 1K W/PERFORMANCE UPGRADES (LB7/LLY) XXX-RATED
  • 29545312-XX

    29545312-XX

    REBUILD KIT, 4TH GEN - 1K W/...
    REBUILD KIT, 4TH GEN - 1K W/ PERFORMANCE UPGRADES (LBZ/LMM) 2006-2010 (XX-RATED)
  • 29545311-XX

    29545311-XX

    REBUILD KIT, 5 SPEED - 1K...
    REBUILD KIT, 5 SPEED - 1K W/PERFORMANCE UPGRADES (LB7/LLY) XX-RATED
  • 29545312-X

    29545312-X

    REBUILD KIT, 4TH GEN - 1K W/...
    REBUILD KIT, 4TH GEN - 1K W/ PERFORMANCE UPGRADES (LBZ/LMM) 2006-2010 (X-RATED)
    Quick View
  • 29545311-X

    29545311-X

    REBUILD KIT, 5 SPEED - 1K W/...
    REBUILD KIT, 5 SPEED - 1K W/ PERFORMANCE UPGRADES (LB7/LLY) 2001-2005 (X - RATED)
    Quick View
29547606-XX
REBUILD KIT - 1K W/ PERFORMANCE UPGRADES (LML & L5P) (XX-RATED)
29547606-X
REBUILD KIT - 1K W/ PERFORMANCE UPGRADES (LML & L5P) (X-RATED)
29547606-XXX
REBUILD KIT - 1K W/ PERFORMANCE UPGRADES (LML & L5P) (XXX-RATED)
29545312-XXX
REBUILD KIT, 4TH GEN - 1K W/ PERFORMANCE UPGRADES (LBZ/LMM) 2006-2010 (XXX-RATED)
29545311-XXX
REBUILD KIT, 5 SPEED - 1K W/PERFORMANCE UPGRADES (LB7/LLY) XXX-RATED
29545312-XX
REBUILD KIT, 4TH GEN - 1K W/ PERFORMANCE UPGRADES (LBZ/LMM) 2006-2010 (XX-RATED)
29545311-XX
REBUILD KIT, 5 SPEED - 1K W/PERFORMANCE UPGRADES (LB7/LLY) XX-RATED
29545312-X
REBUILD KIT, 4TH GEN - 1K W/ PERFORMANCE UPGRADES (LBZ/LMM) 2006-2010 (X-RATED)
29545311-X
REBUILD KIT, 5 SPEED - 1K W/ PERFORMANCE UPGRADES (LB7/LLY) 2001-2005 (X - RATED)
Xcalliber