SKU: 19514559223

Merchant Automotive 10742 MAximum Work Series Allison 1000 Transmission 04.5-05 6.6L GM Duramax LLY

Sale price$2204.55 Regular price$2449.50
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 30 - Aug 4

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Merchant Automotive 10742 MAximum Work Series Allison 1000 Transmission 04.5-05 6.6L GM Duramax LLYIt's true, the Allison 1000 transmission originally set the bar pretty high upon its initial unveiling on the first Duramax equipped Chevy back in 2001. Many looked to this transmission as being the cure for any future transmission issues. And to some degree, the Allisons have proven themselves, but as with all things, time, hard work, and horsepower will cause them to fatigue and fail. Fortunately, the professionals at Merchant Automotive know the

It's true, the Allison 1000 transmission originally set the bar pretty high upon its initial unveiling on the first Duramax-equipped Chevy back in 2001. Many looked to this transmission as being the cure for any future transmission issues. And to some degree, the Allisons have proven themselves, but as with all things, time, hard work, and horsepower will cause them to fatigue and fail. Fortunately, the professionals at Merchant Automotive know the ins and outs of properly building an Allison to deliver the reliability you need from your truck.

Merchant Automotive has a long history of building transmissions for customers from all over the country who depend on their trucks for many types of applications. The components in the Maximum Transmissions were selected specifically based on our experience working exclusively on the GM Duramax trucks with an Allison transmission.

If you depend on your truck to be there when it counts, the Maximum Work Series Transmission is for you! Designed to optimize the potential of the Allison transmission, even with additional power, this transmission still maintains the smoothness of the stock unit for everyday use, but with increased holding capacity when it counts the most.

WARRANTY INFORMATION:
  • Two Year, Unlimited Mileage Warranty

CORE RETURN INFORMATION: You will be required to return your original transmission to Merchant Automotive to receive your core deposit back. Your transmission must match the product purchased (model and year) and be assembled. A completely good transmission will get you a full core refund. However, it is understood that you may have some missing parts and/or damage and we would like to get you as much of a refund as we can for the good usable parts.

Below are examples of items that may reduce the maximum credit:
  • Damaged or missing bell housing $300
  • Damaged or missing rear housing $300
  • Damaged or missing planetary $600
  • Unassembled core $200
  • Missing convertor $200
IMPORTANT FREIGHT NOTE:
The Required Shipping Charge Includes The Return Shipping of the Core Pickup 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 19514559223

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★★★★★ 5
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Reviewed in the United States on May 5, 2026
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Reviewed in the United States on April 17, 2026
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Nick
Bozeman, US
★★★★★ 5
Good fit
Color: Light Grey, Size: Medium
A nice vest and a true slim fit. Good quality for the price and no satin back, the material is used for the whole vest, allowing it to be worn without a jacket and still look smart. I am 6' 3" and 200lbs with a slim build, the Medium size fit like a glove, snug but not tight as a waistcoat should be.
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Reviewed in the United States on May 29, 2022
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Spoot
San Leandro, US
★★★★★ 4
Good Fit, Fold Lines
5'9, around 125-130 pounds, and the Small fit me just fine. Adjuster strap provides a great range of... adjustment. Good waistcoat if you are looking for something quick and cheap. With it being cheap, however, the material suffers. Due to it being folded while in shipping, there are seem lines going down the sides of the waistcoat which make it poke out and look awkward.
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Reviewed in the United States on April 9, 2022
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Heather S.
Boise, US
★★★★★ 5
Great vest for a great price!
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Reviewed in the United States on October 20, 2022

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