CDD -6AN Transmission Cooler Upgrade Kit
CDD -6AN Transmission Cooler Upgrade Kit
Couldn't load pickup availability
Fitment: CDD -6AN Transmission Cooler Upgrade Kit. Match your engine, chassis, transmission and turbo configuration to the details below.
Fulfillment: Supplier-sourced from Classic Diesel Designs. Availability and any manufacturer build time apply; this listing does not indicate stock held at PSC.
Manufacturer information — Classic Diesel Designs
Upgrade to our bolt in 6.0 transmission cooler kit for E40D transmission equipped diesel OBS trucks (1989-1997). This kit completely replaces the fragile, tiny hard lines with our billet fittings and -6AN stainless braided lines, complimented with matching -6AN fittings on the cooler itself so that there is no longer a single hose clamp in your entire transmission cooling system. Every connection will now be an AN (Army-Navy) flare style connection without any sealant or hose clamps ever required again! Additionally, our -6AN lines allow for routing of the cooling lines away from the exhaust and will instead run on top of the frame rail, away from heat and debris.
Every single cooler is individually pressure tested before shipping.
This kit eliminates the factory transmission cooler and internal radiator cooler.
This kit fits with AC and an intercooler kit using factory mounting holes in the radiator support.
This kit will not fit gas or superduty trucks, nor will it work for C6 transmissions or E-series
Update June 2026- now all kits will include gel coated AN lines
Installation Instructions:
https://docs.google.com/document/d/1uDAOoXdpjtWMQWsO8NC3TJfuADwxTsTcFBy0JT8yG9o/edit?usp=sharing
Share
FAQ
How long does shipping take?
Shipping cost is calculated at checkout. Dispatch timing depends on the product and options you choose; delivery timing also depends on your destination and shipping service.
Need parts by a specific date? Call (979) 575-0024 before ordering to confirm availability and the current dispatch estimate for your exact setup. Review our shipping policy for details.
How do I know if a product fits my truck?
Each product page lists the year, make, and model it fits.
If you’re unsure, you can message us through our website, email, or Facebook, and we’ll confirm fitment for you.
Do you offer installation?
Yes. PSC Automotive & Diesel Repair installs everything we sell.
Call or message us to schedule an appointment.
What is your return policy?
- Returns accepted on new, unused items.
Some items are subject to a restocking fee, depending on the manufacturer.
Electrical parts, tuners, and custom-built items are non-returnable.
Full details are on our Refunds page.
What is your warranty policy?
Our warranty matches the manufacturer’s warranty.
If a part fails or has a defect, we will work with the manufacturer to get it replaced.
We do not warranty parts that were:
Installed incorrectly
Damaged by lack of maintenance
Removed or messed with after installation
Installed by another shop after we installed it
Full warranty details are on our Warranty page.
Will I get tracking information?
Yes. Tracking is emailed to you as soon as your order ships.
Check your spam folder if you don’t see it.
Do you offer customer support?
Yes! You can contact us anytime at:
Website chat
Email
Phone
Facebook or Instagram
We reply quickly during business hours.