I'm guessing you have gauges, but if you don't, that would be one reason to run with the 40T over 80DD. It doesn't sound like a lot of weight so you'll probably be fine either way. The main differences will be: about 40 hp(less to worry about temps), and shift points. The higher shift points(in tow) would help in keeping the turbo spooled up when towing heavy and acceleration isn't quite so quick. I think you'll be ok either way.
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Thomas H.
'97 F-250 CCSB 7.3L Auto, Gauges, Modded H2E, 285/200% sticks, 7.3L IC, Stealth Dual HPOP, Pheonix chip
'03 F-250 CCSB 6.0L Auto, Gryphon CTS, FICM tuning by PHP, Powermax
Last edited by F-127; Wed, November 24th, 2010 at 09:10 AM.
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