The Derale 21 Row Series 9000 Plate & Fin Cooler is a furnace-brazed aluminum fluid cooler built with 1-1/4 inch wide plates and embossed turbulators that increase heat transfer while keeping pressure drop low. This plate and fin design is popular with original equipment manufacturers, and the 21-row core suits light to medium duty applications and occasional towing. Cooling the fluid helps prevent heat-related transmission failures, extend transmission life, and improve shifting. It is sold as a cooler only, with 1/2 inch FPT ports and no fittings.
Specifications:
- Style: Plate & fin, Series 9000
- Rows: 21
- Construction: Furnace-brazed aluminum with 1-1/4" turbulators
- Ports: 1/2" FPT (female pipe thread)
- BTU rating: 25,000
- Fluid capacity: 14 oz
- Working pressure: 250 PSI (300 PSI burst)
- Overall dimensions (W x H x D): 9-3/4" x 12-13/16" x 1-1/4"
- Mounting pattern: 6-11/16" x 12"
- Configuration: Cooler only, no fittings
- Part number: 33605
FAQ
What is the Derale 33605 cooler used for?
It is a universal plate and fin fluid cooler for light to medium duty use and occasional towing, commonly plumbed as a transmission cooler.
What port size does it have?
It has 1/2 inch FPT (female pipe thread) ports and is sold as a cooler only, so fittings are purchased separately.
How much cooling does it provide?
It is rated at 25,000 BTU with a 250 PSI working pressure and 300 PSI burst strength.
What are its dimensions?
The core measures 9-3/4" wide by 12-13/16" tall by 1-1/4" deep, with a 6-11/16" x 12" mounting pattern.

