1989-2024 Cummins 5.9L / 6.7L Rear Block Alignment Dowel To Adapter Plate

Cummins SKU: CU-3900068
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1989-2024 Cummins 5.9L / 6.7L Rear Block Alignment Dowel To Adapter Plate

Precision Engine-to-Transmission Alignment for Cummins Engines

The 1989–2024 Cummins Rear Block Alignment Dowel to Adapter Plate is designed to ensure precise alignment between the rear of the Cummins engine block and the transmission adapter plate. These precision alignment dowels help maintain correct drivetrain positioning, preventing misalignment that can cause input shaft wear, pilot bearing failure, and transmission damage.

These dowels ensure the adapter plate sits exactly where it should on the rear of the engine block for proper drivetrain alignment.


Key Features

  • Precision-machined alignment dowel pins
  • Designed for 1989–2024 Cummins engines
  • Ensures accurate engine block to adapter plate alignment
  • Helps prevent transmission input shaft and pilot bearing wear
  • Durable construction for long service life

Why Alignment Dowels Matter

Correct alignment between the engine block and transmission adapter plate is critical for drivetrain reliability. Missing or worn dowels can lead to:

  • Transmission input shaft damage
  • Pilot bearing failure
  • Drivetrain vibration
  • Premature transmission wear

These rear block alignment dowels ensure the adapter plate remains properly located on the engine block, keeping the drivetrain running smoothly and reducing mechanical stress.


Applications

Compatible with:

  • 1989–1998 5.9L Cummins (12V)
  • 1998.5–2002 5.9L Cummins (24V)
  • 2003–2007 5.9L Cummins Common Rail
  • 2007.5–2024 6.7L Cummins
Shipping information

Free economy ground shipping on most orders over $200. This includes lower 48 United States only. Excludes products that must ship freight.

Core Return Info

Read Carefully!

When you purchase a product from our website that has a core requirement, you have two options:

1. You choose to pay the core charge and we will ship the product right away, then once we receive the cores you will be refunded the core charge if your cores pass our inspection qualifications. This is the preferred choice and has the least delays. 

2. You choose to send in your cores before we ship the product that was purchased. This choice has the risk of delayed shipment of your purchased product and our inventory is not guaranteed by the time we receive your cores. You will need to follow all of the instructions below as quickly as possible so that you can get your purchased product and we can receive the cores. When you choose this option you acknowledge that by the time we receive your cores, our inventory could have change and there could be a delay in your shipment. 

 


Please return all cores to:



Industrial Injection Core Returns
2858 South 300 West
Salt Lake City, Utah 84115

INCLUDE RA# THAT WAS ISSUED AT TIME OF PURCHASE! If RA # is lost, please call Customer Service at (800) 955-0476. Have your original invoice at time of phone call to give all appropriate information for return.

Core return freight is the responsibility of the customer

FULL CREDIT WILL BE GIVEN WHEN: 

In order to receive full core credit, your core(s) must be returned within 90 days from receipt of order. It must be as is “off the engine.” Full core credit will be given if core meets acceptance criteria. Cores that are damaged during shipment to Industrial Injection are the responsibility of the customer and their shipping company.

½ CORE CHARGE CREDIT WILL BE GIVEN WHEN:

  • Slightly damaged housing or camshaft
  • Missing parts such as FCA

No Core Credit issued when:

  • Core is seized or hydraulic head is cracked
  • Excessive damage ( Heavy use of Bio-diesel and rust are common causes for unacceptable core)
  • Core is fire damaged
  • Core is returned after 90 days/3months

Please do the following when returning a core:

  • Make sure you have removed all fittings from your old unit
  • Drain all fuel and oil from unit
  • Package cores so that fuel and oil does not escape from the package

NOTE: packages that have fuel or oil residue on the outside of the box during shipping will not be delivered by UPS or the postal service which will cause delays.

  • Please re-use boxes and bags that parts were shipped in originally. These boxes are UPS approved to reduce damage while being handled in freight.
  • All shipping charges are the responsibility of the customer
  • Please write on the box “Core Return” and have RA # clearly written on the outside of box
  • Include copy of original invoice and RGA inside box

PLEASE RETAIN RA#, INVOICE # AND TRACKING NUMBER UNTIL CREDIT IS RECEIVED BY YOU. We do not research by customer name, only invoice # or RA #.

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