Description
Product Overview
The iFJF LPD47391 Transmission Oil Cooler delivers advanced cooling protection rated for up to 40,000 lbs GVW. Brazed aluminum plate design with self-regulating flow technology balances cooling efficiency with proper fluid pressure critical for towing, hauling, RV use, and commercial applications. Overheating is the #1 killer of automatic transmissions this cooler keeps fluid in the safe range even under maximum load.
Key Features
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40,000 GVW Rating: Heavy-duty applications including towing, RV motorhomes, commercial vans, and light trucks.
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Self-Regulating Flow: Built-in thermal bypass allows cold fluid to bypass during warmup, then directs full flow when at operating temp.
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Brazed Aluminum Construction: Superior heat transfer and durability vs tube-and-fin. Precision fin spacing maximizes surface area.
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Universal Application: Compatible with most cars, vans, light trucks, SUVs, RVs, and towing vehicles.
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Extends Transmission Life: Every 20F reduction in fluid temperature doubles fluid service life.
Applications
| Vehicle Type |
Typical Use |
| Light Trucks 1500-3500 |
Towing trailers, boats, campers |
| SUVs & Vans |
Family travel, cargo transport |
| RVs & Motorhomes |
Long-distance heavy chassis loads |
| Performance |
High-HP, track use, oversized tires |
Specifications
| Part Numbers |
LPD47391 / OC-4739-1 |
| GVW Rating |
Up to 40,000 lbs |
| Core |
Brazed aluminum plate |
| Includes |
Cooler, hardware, hose fittings, instructions |
Frequently Asked Questions
Q: What size vehicle can this handle?
A: Rated for up to 40,000 lbs GVW suitable from passenger cars to Class A motorhomes and commercial vehicles.
Q: Should I bypass the factory cooler or run in series?
A: Run in series after factory radiator cooler for maximum cooling while allowing proper warm-up in cold weather.
Q: Will this work with manual transmission?
A: Designed for automatic transmission fluid (ATF). Some high-performance manuals can benefit with electric pump setup.
Related Guides & Resources
