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High Flow transmission coolers
Allison transmission cooling

Designed for rugged heavy duty use
Use with transmission, engine and hydraulic oils.
Working pressures up to 300 psi.
High flow Allison transmission cooler applications


Flow ratings listed for normal transmission cooler psi.
BTU ratings at 2500 FPM air flow @ 100 ITD temp.
Most truck fans (17" dia.) move over 2000 FPM!
Allison A540 to 750 series transmissions
GM Duramax, Allison transmission cooling
1000 & 2000 series require 6 to 8 GPM flow rate.

Check your cooler line size first.
Measure available mounting space.
Use Fan Coolers for remote installations

Includes Cooler & mounting kits only!

Cooler Installation Information and Guide



Allison - High flow coolers
Automatic Transmission Parts


Use these 3/4" fitting coolers with 5/8", 3/4" & 7/8" O.D. lines.
High flow coolers - 3/4 fittings Image Price    
DB-1268 High flow cooler - 3/4" fitting, 18.0 x 13.0 x 1.5 Overall size
Flow range 4 - 20 GPM
Heat rejection range 21,000 - 26,000 BTU/Hr at 2500 FPM air flow
Includes (2) DB-515-B mounting kits
$ 169.84  
DB-1260 High flow cooler - 3/4" fitting, 24.0 x 13.0 x 1.5 Overall size
Flow range 4 - 20 GPM
Heat rejection range 28,000 - 38,000 BTU/Hr at 2500 FPM air flow
Includes (2) DB-515-B mounting kits
$ 181.91  
DB-1290 High flow cooler - 3/4" fitting, 24.0 x 19.0 x 1.5 Overall size
Flow range 5 - 20 GPM
Heat rejection range 38,000 - 52,000 BTU/Hr at 2500 FPM air flow
Includes (3) DB-515-B mounting kits
$ 227.12  
DB-1299 High flow cooler - 3/4" fitting, 24.0 x 22.4 x 1.5 Overall size
On Special! Regular price $265.00
Flow range 2 - 12 GPM
Heat rejection range 39,000 - 56,000 BTU/Hr at 2500 FPM air flow
2 pass type cooler, lines are on opposite sides.
Includes (3) DB-515-B mounting kits
$ 253.58  
DB-515-B Mounting kit for High Flow Tube cooler (1 kit = 2 mounts)
Order as many needed!
2 rubber mounts, 2 brackets & 2 bolts.
Isolates cooler from vibration and offers a secure mount. Special elastomer block installs in header holes (side tubes) and expands when tightened, for a secure hold.
$ 4.68  
DB-1231 High flow cooler - 3/4" fitting, 24.0 x 7.2 x 1.5 Overall size
Flow range 2 - 12 GPM
Heat rejection range 12,000 - 20,000 BTU/Hr at 2500 FPM air flow
Includes (2) DB-515-B mounting kits
$ 126.79  

Use these 1" fitting coolers with 3/4", 7/8", 1" & 1 1/8" O.D. lines.
High flow coolers 1 fittings Image Price    
DB-1292 High flow cooler - 1" fitting, 24.0 x 25.4 x 1.5 Overall size
Flow range 5 - 30 GPM
Heat rejection range 52,000 - 71,000 BTU/Hr at 2500 FPM air flow
Includes (4) DB-515-B mounting kits
$ 303.19  
DB-2305 High flow cooler - 1" fitting, 24.0 x 31.4 x 1.5 Overall size
Flow range 12 - 30 GPM
Heat rejection range 61,000 - 85,000 BTU/Hr at 2500 FPM air flow
Includes (4) DB-515-B mounting kits
$ 369.51  
DB-515-B Mounting kit for High Flow Tube cooler (1 kit = 2 mounts)
Order as many needed!
2 rubber mounts, 2 brackets & 2 bolts.
Isolates cooler from vibration and offers a secure mount. Special elastomer block installs in header holes (side tubes) and expands when tightened, for a secure hold.
$ 4.68  

Fan mounted coolers are great when you can not mount a cooler in front of your engine fans air flow.
Fan coolers assure continued cooling even in Stop & Go traffic.
High flow coolers with Fans Image Price    
DB-343DC-12 High flow - Fan cooler 3/4" fitting, 18 x 12.75 x 6.75 overall size
On Special! - Regular price $ 410.00
Flow range 4 - 20 GPM
Heat rejection range 15,100 - 19,700 BTU/Hr
12 volt fan
Hoses, couplers & thermostat sold separately.
$ 406.82  
DB-345DC-12 High flow - Fan cooler 3/4" fitting, 24 x 19 x 6.7 5 overall size
Flow range 5 - 21 GPM
Heat rejection range 22,900 - 31,100 BTU/Hr
12 volt fan

Hoses, couplers & thermostat sold separately.
$ 528.10  
DB-341DC-12 High flow - Fan cooler 1" fitting, 24 x 19 x 6.75 overall size
Flow range 5 - 30 GPM
Heat rejection range 22,700 - 33,000 BTU/Hr
12 volt fan

Hoses, couplers & thermostat sold separately.
$ 528.10  
DB-TCF180 In-line fan thermostat - activates at 180 +-
Screws in to a "T fitting" (customer supplied) in the Inlet side of the Fan Cooler.
1/2" pipe thread on unit.
For DB High flow fan coolers only!
$ 51.27  

Water cooled - Transmission Oil Cooler assembly.
This is totally different from all the other transmission coolers that use Air to cool the fluid.
Water from the radiator flows around the sealed inner transmission cooler.
This is a great low cost choice when you have an original external "water cooled" transmission cooler that is leaking.
This is a aftermarket cooler designed to replace many original type external water coolers.
Designed to REPLACE existing water cooled coolers, NOT intended to be installed as a retro fit!
Heat exchanger - water cooled Image Price    
TDI-13680 Heat exchanger - Transmission Oil Cooler assy. - Water cooled
Transmission oil cooler ports are 3/4" npt
Water cooling ports are 2.25"
Heat duty ~up to 360,000 BTU/hr at 10 to 20 GPM flow rate
Aftermarket replacement oil to water heat exchanger for many motor homes & large trucks.
Overall length = 22.70" +-
Cooler body width = 3.36" +- (excludes brackets)
Overall height = 5.3" +-
Mount bracket bolt holes = 9.75" +- / 5 3/4" +-
$ 439.90  


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Makco Distributing, Inc. - 4255 Bryson Blvd., Florence, AL 35630
Phone 256-767-2840 - FAX 256-767-2841
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Makco Distributing, Inc. customers may use our web site for purposes of placing orders with Makco Distributing, Inc.. But no permission is granted to any customer or other individual or entity to make use of the web site, data, part numbers, descriptions or prices to compete with Makco Distributing, Inc. in any way. This site and all its contents are the proprietary property of Makco Distributing, Inc. .


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.
You must be 18 or older to order from this site.


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