Derale Transmission Fluid Cooler For a 2006 GMC Sierra 2500HD With AN Transmission Lines
Updated 06/29/2022 | Published 06/28/2022 >
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Question:
So I have a 2006 GMC 2500HD with the Allison transmission and the 8.1 V8. I am looking at upgrading my existing transmission cooler to a new Derale 51978. I have removed the existing rubber crimped lines and replaced them with braided steel lines and used AN fittings after I flaired the metal lines. Now looking at getting a bigger cooler and removing the lines going to the radiator and run them straight from the transmission to the cooler. I know they say that the radiator is to warm the transmission fluid when it is cold. Is there any problems with doing this?
asked by: Art E
Expert Reply:
To attach the Derale 19-Row, High-Performance, Stacked-Plate Cooler # D51978 you will need to get the correct fittings to match your AN fittings you added to your transmission lines.
Derale -6 AN Aluminum Fitting # D59006
Derale -8 AN Aluminum Fitting # D59008
Derale -10 AN Aluminum Fitting # D59010
Derale -12 AN Aluminum Fitting # D59012
You will be able to run the lines directly to the cooler and remove the lines that go into the radiator. I do recommend using a Edge Insight CS2 Comprehensive Gauge Display # EP84030 to monitor the transmission fluid temperature to ensure you do not overheat your transmission.

Product Page this Question was Asked From
Derale 19-Row, High-Performance, Stacked-Plate Cooler with -10 AN O-Ring Inlets - Class V
- Transmission Coolers
- Stacked-Plate Cooler
- Heavy-Duty Truck
- Standard Mount
- 13W x 6-7/16T x 2D Inch
- With - 10 AN O-Ring
- Derale
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