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Hayden Automotive 778 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler

Free shipping on orders over $29.99

$105.01

$ 45 .99 $45.99

In Stock

About this item

  • Size is 1-3/4 inch X 8-7/8 inch X 12-15/16 inch
  • Class "A" motor homes, large travel trailers, 5th wheel trailers
  • GVWR up to 30,000 pounds, towing up to 10,000 pounds
  • Plate and fin, heavy duty, high capacity design
  • 12 fittings for maximum flow capacity
  • Fit type: Vehicle Specific



rem700vtr
Reviewed in the United States on September 27, 2023
Ordered item twice. Both deliveries were damaged. Even if the box arrives in good shape, inspect the tabs for damage and deformation. The tabs were bent on both units I received. Since the cooler is aluminum, it isn't worth installing to find out it leaks later.
Going in raw
Reviewed in the United States on November 14, 2023
Very well made, probably the best made oil cooler IMO. 2003 Chevy 1500HD. Transmission 165-175 degrees towing. Made my own brackets from Home Depot. Would buy again
Zechariah Bordon
Reviewed in the United States on October 8, 2022
Put this in my 05 expedition in addition to another after market transmission cooler which I had previously installed. I tow a 7k Travel Trailer and this thing really helped bring my temps down from over the edge. Adding this to my system drop my temps about 20 degrees
David
Reviewed in the United States on January 3, 2021
Installed this external cooler on a Toyota Tundra.Without a cooler transmission pan temps were around 225 degrees, now stays around 185 degrees.I did not use the plastic mounting zip ties, used a metal bracket instead.
Michael J.
Reviewed in the United States on October 16, 2020
First one damaged, second one damaged as well, they are NOT made in USA, so typical 3 world quality garbage
Stas M.
Reviewed in the United States on March 5, 2019
I use it on my 07 Chevy trailblazer 4.2l and it works flawlessly!
Matt K
Reviewed in the United States on September 24, 2016
With some brackets made up, fit and works great on my duramax
Joanna Wojtczak
Reviewed in the United States on August 11, 2016
My auto transmission runs about 10-20Degrees cooler even I the mountains and towing my jeep. Only con, it doesn't come with any fittings, it was a pain to get them