98.5-03 7.3L CNC Fab 4R100 Transmission Cooler Bypass Fittings - 425033

Introducing the latest upgrade for your 98.5-03 7.3L Ford Powerstroke.  CNC Fabrication 4R100 transmission cooler bypass fittings. These fittings have been designed to replace your...
Vendor: CNC Fabrication
SKU: 425033
Availability: In Stock
Product Type: Automatic Transmission Parts
Please hurry! Only 100 left in stock
Subtotal: $79.95
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Return Policy

Within 21 Days

California Residents:
Prop 65 Warning:
Cancer and Reproductive Harm

Introducing the latest upgrade for your 98.5-03 7.3L Ford Powerstroke.  CNC Fabrication 4R100 transmission cooler bypass fittings. These fittings have been designed to replace your factory bypass tube that is known to fail and cause overheating issues in your transmission.

Crafted from high-quality 12L-14 carbon steel, these fittings are built to withstand extreme conditions and ensure long-lasting performance. The black zinc chromate plating adds an extra layer of protection against corrosion, making them a reliable choice for any truck owner.

One of the key features of these fittings is their longer thread count, which provides superior thread engagement and prevents stripping out of the threads inside the transmission case. This ensures a secure fit and eliminates the risk of leaks or damage.

We have also installed new Viton O-rings inside the fittings. These premium quality O-rings are known for their exceptional resistance to heat, chemicals, and other harsh substances, making them ideal for use in automotive applications.

Don't let a faulty bypass tube compromise the performance and longevity of your transmission.  Trust CNC Fabrication for top-quality aftermarket parts that deliver exceptional results every time.


  • Machined out of 12L-14 carbon steel
  • Black Zinc Chromate Plated for long life against corrosion
  • Longer thread count for better thread engagement to avoid stripping out the threads inside the transmission case
  • New Viton O-rings installed inside the fittings 

NOTE:  **These fittings are ONLY for transmissions that originally came in trucks. E-Series van transmissions have different style of fittings**



Brand: CNC FabricationManufacturer Part Number: 425033Length (in): 8.0Width (in): 5.0Height (in): 2.0Weight (lbs): 1.0

Returns Policy

You may return most new, unopened items within 21 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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