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Home > Cooling products > Tru Cool Heavy Duty

Cooling products
Automatic Transmission Tru Cool Heavy Duty

Tru Cool Heavy Duty transmission cooler kits
1 1/2" thick Cooler kits
Ideal for trucks, heavy duty cooling, RV use and towing applications!
LPD (Low pressure drop) highly efficient transmission fluid cooling technology that combines improved protection against lube system failure with the required levels of optimal heat transfer.

For use with 5/16" & 3/8" transmission cooler lines.
Do not use on 1/2" or larger lines used on some Chrysler diesels and Allison transmissions.

Tru Cool Max


Cooler Installation Information and Guide

Part #    Name & Description Image Price    
4588       Tru-Cool LPD, thick cooler & standard installation kit
On Special!
Truck & heavy duty to 19,000 GVW
Low pressure drop cooler , 5 3/4 x 11 x 1 1/2 thick


$58.43
4589       Tru-Cool LPD, thick cooler & standard installation kit
On Special!
Truck & heavy duty to 24,500 GVW
Low pressure drop cooler , 8 x 11 x 1 1/2 thick


$71.66
4590       Tru-Cool LPD, thick cooler & standard installation kit
On Special!
Truck & heavy duty to 28,000 GVW
Low pressure drop cooler, 12 x 11 x 1 1/2 thick


$84.35
4739       Tru-Cool MAX transmission cooler with external thermal bypass
Tru-Cool # LPD4739-1 cooler plus a # 708-4739 Remote external thermal bypass
40,000 GVW rating, 45,000 BTU rating
8 1/2 x 22 3/4 x 1 1/4 inch
3/8 inverter flare (fittings are included for thread to hose barbs) Includes external thermal bypass for cold climates!


$154.35
4739-1       Tru-Cool MAX transmission cooler *without external cold weather thermal bypass
Tru-Cool # LPD47391 40,000 GVW rating, 45,000 BTU rating
8 1/2 x 22 3/4 x 1 1/4 inch
3/8 inverter flare (fittings are included for thread to hose barbs)
WITHOUT external thermal bypass. Lower cost for locations where there are mild winters!


$130.10
4920-1       Tru-Cool MAX transmission cooler (Mini Max)
3/8" hose barbs on side of cooler.
Size 4 x 23 x 3/4 inch
WITHOUT external thermal bypass!
8 plates, 24,000 GVW / 22,000 BTU ratings


$81.04
4920-1K       Cooler kit for RIALTA GROUP (Canada Version)
Package Includes:
4920-1,Tru-Cool MAX transmission cooler (Mini Max)
75496K KIT, VW095 COOLER ADAPTER
723-4318, Transmission cooler hose(5 foot)
708-4739, Remote external thermal bypass NOT INCLUDED- order separately as needed


$129.84
4921-1       Tru-Cool MAX transmission cooler (Medium Max)
3/8" hose barbs on side of cooler.
Size 6 x 23 x 3/4 inch
WITHOUT external thermal bypass!
12 plates, 30,000 GVW / 34,000 BTU ratings


$99.78
4921-1K       Cooler kit for RIALTA GROUP (U.S. Version)
Package Includes:
4921-1, Tru-Cool cooler (Medium Max)
75496K KIT, VW095 COOLER ADAPTER
723-4318, Transmission cooler hose(5 foot)
708-4739, Remote external thermal bypass NOT INCLUDED- order separately as needed


$149.63
708-4739       Remote external thermal bypass
External thermal bypass for large coolers used in cold climates (32 degree -).
Installs in cooler line. Includes bypass only!
Use on 5/16" & 3/8" line sizes ONLY!!
Opens fully at approx. 180 +-


$30.32
75496K       KIT, VW095 COOLER ADAPTER 90-UP ( Sonnax # 119814-01K )
Volkswagen: 01M, 096, 01P, 098 Audi: 01N, 097
Sonnax Part Number: 119814-01K
Adapter Kit for Remote Transmission Cooler
Product Data Sheet
Installation Instructions


$44.05
Most Tru-Cool Transmission oil cooler kits contain:
Cooler, hose, fittings and hardware, 2 styles of mounting hardware - Quick connect nylon straps & steel mounting, easy installation instructions.
(NO special tools required)
*Some late model cooler applications may require additional fittings when installing a cooler kit.

The 4739, 4920 & 4921 series "MAX" cooler kits do not include nylon straps! Install by brackets or included steel straps.


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Makco Transmission Parts - 4255 Bryson Blvd., Florence, AL 35630
Phone 256-767-2840 - FAX 256-767-2841
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We recommend that these transmission parts and accessories are installed by an automotive professional, with the proper tools and training.
These parts are for professional use, these are not retail packaged products.
Please go to the Sales Information page and read our Limited warranty and Company policy before you order.
Parts that are pre-packaged and sealed are NOT RETURNABLE once they are opened.
Errors in description, photography, price, or typographical errors are subject to correction.
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