Buying Guide
Where to Buy a Heavy-Duty Transmission Cooler
Stock coolers are sized for a stock vehicle with no trailer. Add 8,000+ lbs of trailer and the trans overheats within 30 minutes of summer highway pull. An HD cooler is mandatory for any tow rig.
gearboxinsider.com
$120-280
Shipping: Same dayWarranty: 1 year
Tru-Cool and Derale stacked-plate coolers, BTU-rated for tow
Shop Gearbox Insider →Shipping: 1-2 day PrimeWarranty: Varies
Widest selection of Hayden, B&M, Derale models
Search Amazon →Shipping: 2-3 dayWarranty: 1 year
Performance options, racing-grade coolers, Earl's plumbed setups
Browse Summit →Tru-Cool direct (Long Manufacturing)
$150-340
Shipping: 2-5 dayWarranty: 1 year
OEM-supplier of stacked-plate coolers, highest quality
Visit Tru-Cool →Our recommendation
For any tow rig: minimum 40,000 BTU stacked-plate cooler. Tru-Cool 4454 or Derale 13950 are industry standards. Skip the cheap tube-and-fin units — they fail under sustained heat.