SKU: 39451055118

K-4266R Genuine Eaton TCM Transmission Control Module

Sale price$200.22 Regular price$222.47
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Description

K-4266R Genuine Eaton TCM Transmission Control ModulePart details DESCRIPTION TCM Transmission Control Module CONDITION Used BRAND Eaton PART NUMBER K 4266R OTHER OEM PART NUMBERS THAT WILL WORK A2C7561430000, 10001705A, K 4266, K 4269, K 4274, , K 4269R, K 4274R, ECK4398, 2519502C91, K 4398, K4398, 10001705 , E271000R, K 4354, E27 1000R, K 4398R, K 4354 PAC, K4354PAC, K 4354R PAC, K4354RPAC Function of this part The engine control module (ECM) is the electronic brain of the engine. It reads information

Part details

DESCRIPTION TCM Transmission Control Module
CONDITION Used
BRAND Eaton
PART NUMBER K-4266R
OTHER OEM PART NUMBERS THAT WILL WORK A2C7561430000, 10001705A, K-4266, K-4269, K-4274, , K-4269R, K-4274R, ECK4398, 2519502C91, K-4398, K4398, 10001705 , E271000R, K-4354, E27-1000R, K-4398R, K-4354-PAC, K4354PAC, K-4354R-PAC, K4354RPAC

Function of this part

The engine control module (ECM) is the electronic brain of the engine. It reads information from sensors and commands fuel delivery, timing, and other actuators to keep the engine running properly.

Why this part matters

Without a functioning ECM, the engine will not start or will run poorly. A correct, working ECM is essential for performance, diagnostics, emissions control, and protecting the engine from damage.

About the brand

Eaton components are commonly used in commercial truck and equipment applications where dependable performance and proper fit are important.

Fitment & usage

Used OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.

Note: Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.

Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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SKU: 39451055118

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4.7 ★★★★★
Based on 2074 reviews
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Product Reviews
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Verified Purchase
Brenda A DeRouen
Fort Morgan, US
★★★★★ 1
Before use on March 15 two days later March 17 engine light still on
Size: 1 Count (Pack of 1), Size: 1 Count (Pack of 1)
I read the specs on this product and it was guaranteed to cleanse as well as turn engine light off in vehicle. I received it March 14.2026 and used it on March 15.2026 I took a picture on Sunday before I entered it into the gas tank engine light was on at that time. Today is March 17.2026 and engine light is still on. The truck was driven for one hour on the 15th 45 minutes on the 16th and 50 minutes on 17 March. Still the engine light is on. Got home parked the vehicle took a picture again to show engine light is still on product guaranteed it was shut it off, but unfortunately product does not work.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026
A
Verified Purchase
Amazon Customer
Grantham, US
★★★★★ 4
Good stuff
Size: 1 Count (Pack of 1)
I've used and it's worked for emissions for me and that's with having check engine light on..use stuff,drive around a bit,clear code drive to emissions and should b good unless got serious problems. It's good to use 1 or 2 times a yr if high mileage vehicle.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 1, 2025
A
Verified Purchase
A.U.
Grantham, US
★★★★★ 5
It works!
Size: 1 Count (Pack of 1)
My 2005 Jetta failed the inspection and my mechanic said (after clearing the engine light) that I should drive the car for 20 min highway and 20 local. We've tried that the whole day but out of three lights on his device only 1 went away. Next day the light engine came back. After not being happy with the explanation offered by him (a family friend) that I should keep driving it until we get lucky I went online and found CRC 05063. Followed the instruction (one bottle on full tank of gas). Before my tank was under 3/4, engine light went off!! At half tank I went and did the inspection - IT PASSED! I am really impressed! Update August 2015! I have been using this product for 2-3 years now and if it is not working for you please read. In July I have used the first bottle and took my 2005 Jetta for inspection. It failed. Ordered a second bottle and it failed again. My mechanic said keep driving. Did 200 miles in one day and nothing. Decided to take matters in my own hands and ordered Autel MaxiScan MS300 ($18, it allows you to read and delete codes). There were two faults - EVAP and 2nd something about Oxygen. Went online and this is the first time I heard about driving cycles. These are steps that you have to follow so that your car's computer can start measuring all the parameters needed for the test. Driving cycles are not exact science but I tried to follow the instructions as much as I could and after just 20 minutes (10min city and 10min highway) ALL the parameters were set and I passed the emission test with flying colors! So, just before you give a comment about CRC like "tried and didn't work" be aware that there are other things you have to take into account.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 1, 2013
C
Verified Purchase
Colleen Milakovich
Birmingham, US
★★★★★ 3
My car did not pass!
Size: 1 Count (Pack of 1)
My car didn't pass. However, the company CRC sent me a reimbursement check.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
R
Verified Purchase
RON HAGGIN
New York, US
★★★★★ 5
Pass Again
Size: 1 Count (Pack of 1)
This product never fails (no pun intended), I have been using this for the last 10 years my car has never failed a smog test. I highly recommend this and that you use it correctly. You will not be disappointed.
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Reviewed in the United States on March 27, 2026

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