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USA Standard Gear ZMG56-9A G56 Manual Transmission 5th & 6th Gear Countershaft 6.7L

Manufacturer

Picture for manufacturer USA Standard Gear

Part Number

ZMG56-9A
9 reviews
Sale Price

$431.80

Estimated ship date Saturday, November 21

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Fitment guaranteed

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Product Details

The USA Standard Gear ZMG56-9A is a precision-engineered countershaft assembly designed specifically for G56 six-speed manual transmissions equipped with the 6.7L Cummins diesel engine. This critical drivetrain component integrates both the 5th and 6th gear positions on a single countershaft, ensuring proper power transfer and smooth shifting performance in heavy-duty applications.

Key Specifications:

  • Cluster gear tooth count: 47 teeth (5th gear) and 52 teeth (6th gear)
  • Application-specific design for 6.7L diesel engines
  • Direct replacement for worn or damaged OEM countershaft assemblies
  • Precision-machined gears for optimal mesh and reduced noise
  • Engineered to handle the demanding torque output of Cummins diesel applications

The countershaft is a fundamental component in the G56 transmission's gear train, responsible for transferring power from the input shaft through the selected gear ratio to the output shaft. This part is essential for transmission rebuilds or repairs when addressing worn gears, damaged teeth, or bearing-related failures. USA Standard Gear manufactures high-quality replacement transmission components engineered to meet or exceed OEM specifications for reliable performance and durability.

Great service, great price and super fast shipping. Overall an AAA+++ experience!

No issues w/the order... shipped quickly and parts arrive in undamaged/perfect condition...

produce shipped quickly and was package very well. Arrived on date provided at shipping.

First order experience was great. Received the day after I ordered. I ordered the very same item on Jul 21st, got a shipping notification and tracking number but the item appears to be stalled somewhere. I need it sooner rather than later. I have spoken with customer service via telephone call and online chat, but not getting much of a response from either. Appreciate someone looking into it as I need this item quickly. Thanks, Tim.

Fast easy checkout great fit

Pleasurable shopping experience

I contacted Customer Service when I didn't receive a Tracking Number. The two items arrived a few days later. All was good. Thank You

Great product, price, and delivery.

Found the part I needed IN STOCK and at the best price! I was not even able to find the part on the manufacturer's website!

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