2003 7.3L PSD tranny cooling - Ford Powerstroke Diesel Forum
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Old 09-15-2010, 07:09 AM
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2003 7.3L PSD tranny cooling

I have a 7.3L 2003 PSD. Tranny oil was getting warm in the desert and I wanted to replace the trans cooler with the 6.0L larger tranny cooler. Good idea? Bad idea? any alternatives? Thanks
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Old 09-15-2010, 07:10 AM
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great idea! 6.0 is a great cooler. if you dont do with a 6.0 cooler get the biggest sob that will fit. 6.0 cooler is a very popular mod.
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Old 09-15-2010, 07:17 AM
SJB SJB is offline
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The 6.0 cooler is the "Most" recommended cooler on here, however, it is pricey if you are going to buy new. You can find them used from a wrecking yard for pretty cheap (I found mine used for like $50). You are buying at your own risk if you buy used. Make sure you do a flush before installing it.

If you don't go with the 6.0, the next best option a lot of guys do is run the Tru-Cool 4739 Max in series with your stock cooler. You can get it at Dieselsite. Both options would be a huge improvement over stock.

http://www.dieselsite.com/index.asp?...ROD&ProdID=205
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Old 09-15-2010, 03:14 PM
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the 6.0 cooler worked great for me! it now usually runs at 125 degrees now, that is unloaded. it has been in the upper 60s to low 70s here lately.
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Old 09-16-2010, 06:45 PM
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my 6.0 cooler dropped the temps by 40-50 degrees, I ran it inline with stock cooler
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