Xcalliber

Xcalliber Xcalliber has specialized in repairing, replacing, and upgrading Allison transmissions since 1984 and offers a full line of stock and performance parts.

Whether you have a GM Duramax truck or a fleet of commercial vehicles, Xcalliber has you covered.

To the fallen, the families who loved them, and the veterans who carry their memory — we honor you today and every day. ...
05/22/2026

To the fallen, the families who loved them, and the veterans who carry their memory — we honor you today and every day.

In observance of Memorial Day, we'll be closed on Monday, May 25. 🇺🇸

Save on 1K/2K Seal and Gasket Kits (Less Piston Kits) for your Allison transmission.29545311-LP (LB7/LLY) ➡️ $162.50eaOr...
05/20/2026

Save on 1K/2K Seal and Gasket Kits (Less Piston Kits) for your Allison transmission.

29545311-LP (LB7/LLY) ➡️ $162.50ea
Order now: https://www.xcallibertransmission.com/product/29545311-lp-df/

29545312-LP (LBZ/LMM) ➡️ $174.99ea
Order now: https://www.xcallibertransmission.com/product/29545312-lp-df/

29547606-LP (LML/L5P) ➡️ $188.00ea
Order now: https://www.xcallibertransmission.com/product/29547606-lp-df/

We assemble these kits in house — In the U.S.A. 🇺🇸

Additional discounts may apply for Platinum and Black Dealers.

The ONLY American-made performance hubs, carriers, and shafts come from Xcalliber. Upgrade your Allison transmission and...
04/10/2026

The ONLY American-made performance hubs, carriers, and shafts come from Xcalliber.

Upgrade your Allison transmission and keep it American. Get your billet parts at XCALLIBER.COM. 🇺🇸


We’re proud to share this kind recognition from Veterans Park Elementary. We’re always happy to support our local school...
02/27/2026

We’re proud to share this kind recognition from Veterans Park Elementary. We’re always happy to support our local schools.

Customize a renewed Allison 1000 transmission for your GM Duramax pickup — LB7, LLY, LBZ, LMM, LML, or L5P.Renewed stock...
01/05/2026

Customize a renewed Allison 1000 transmission for your GM Duramax pickup — LB7, LLY, LBZ, LMM, LML, or L5P.

Renewed stock transmissions are in stock and ready to ship, and performance models are available from 500–2,000 HP.

Features and Benefits:

• Dyno-tested — In stock, ready to ship
• Complete with the latest upgrades
• Contains the most new parts in the industry
• New coolers in stock
• ATF in stock
• Free return freight on core (continental U.S.)

To order your renewed Allison transmission, call 800.682.1290, email [email protected], or customize your build online by clicking here:
https://www.xcallibertransmission.com/renewed-allison-transmissions/

Xcalliber’s renewed Allison transmissions are in stock and ready to ship.Available Series:• Allison 1000 / 2000 / 2500• ...
01/05/2026

Xcalliber’s renewed Allison transmissions are in stock and ready to ship.

Available Series:

• Allison 1000 / 2000 / 2500
• Allison MD3000 / B400 / T200
• Allison HD4000 / B500 / T400
• Legacy transmissions (AT / MT / HT)

Features and Benefits:

• Dyno-tested — In stock, ready to ship
• Complete with the latest upgrades
• Contains the most new parts in the industry
• New coolers and cooler kits in stock
• Yokes in stock
• Flywheels and ring gears in stock
• TCMs and shift selectors in stock
• Free return freight on core (continental U.S.)

To order your renewed Allison transmission, call 800.682.1290, email [email protected], or request a quote by clicking here:
https://www.xcallibertransmission.com/renewed-allison-transmissions/

Address

115 Commerce Road
Brookfield, CT
06804

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 4:30pm

Telephone

+18006821290

Website

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