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Parts for Allison®
Renewed Allison® Transmissions

GM DURAMAX PARTS

  • Allison® 1000

  • Allison® 10L1000

COMMERCIAL PARTS

  • Allison® LCT 1000 / 2000 / 2400

  • 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 / 2400

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 / 2400
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
GM Duramax Trucks
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GM | Duramax Applications

Stock & performance parts for your Allison® GM | Duramax Transmission

Parts for Allison® Transmission
Virtual Transmission
Upgraded Allison® Transmissions

"Five stars all the way!"

My Rig.
2007.5 Chevy 3500 dually EFI tunes DP and EGR Delete 485HP. I pull a large and overbuilt solar powered 37' 5th wheel across the country from Tennessee to Montanatwice a year.

My original transmission was rebuilt at 89,000 mi with a 700HP kit including a 3 clutch Torque converter, all new internal clutches, and shift kit / pump. (Local shop in VA) At 123,000 miles the Transmission started to slip and would enter limp mode if I got on it at all. Also banging into gear downshifting. I was never happy with this performance “upgrade” as it always shifted very hard. Maybe great for racing but not good for towing. The warranty was only good at that shop and I was hundreds of miles away with a brick for a transmission. Soooo...

I contacted Jeff at Xcalliber. Jeff wanted to know everything about my truck and trailer as well as how I drive it before he made any recommendation. He finally recommended a transmission build with a special gearing option that lowered my first 3 gears as well as special PTO covers that concentrate the fluid onto the #3 clutch pack. This is unique to DEFEO Manufacturing Co. (DBA Xcalliber)

1000PK-RED-G4-R (6320942066) - 1000PK XCALLIBER - RED PERFORMANCE SERIES ALLISON TRANSMISSION (6 SPEED) LBZ/LMM THIS LBZ/LMM RED UNIT BUILT TO ALLISON S/N 6320942066 SPECIFICATIONS

P347B-X - P3 PERFORMANCE KIT with TCM Flashing
6774322-X - PERFORMANCE C3 SIDE OILING PTO COVER SET

I had it installed at a local custom diesel truck shop in Greeneville, Tennessee. The owner of that shop commented on the trans when he received it saying “Wow! Someone went way above and beyond building this unit”. That was a nice comment as this particular shop is one of the best in Tennessee. Jeff had also sent them a three page hand written instruction set for the install to make sure everything went well.

My truck shifts like a brand new Cadillac!! Better than when it was brand new! This thing now has the gearing to pull a very heavy trailer off the line with very little throttle and at the lowest tuner setting!!I am one very happy camper!

I was blown away with the service I got from everybody at Xcalliber. They are professional, knowledgeable and very detail oriented. I would highly recommend them without reservation. Jeff Abbotts really knows his business!!

-Roy

The parts have arrived and I just wanted to say how impressed I am with the quality of them all - even down to the packaging. Very professional! Thanks again for helping me and sorting out the parts list. I can’t wait to rip out the box and start rebuilding it.

Thanks again to Anthony.

-Mitch

Xcalliber