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Power Strokes
94-97 Aftermarket
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[QUOTE="Charles, post: 637854, member: 103"] I said, the only time to run a manual would be when the task didn't make the cost of the auto practical. That's the only reason my F550 has a manual with a 350 dollar clutch... It's already there, and it's cheap, although on trans number 3 it's not as cheap as it should be... I have had to drag our 550 with the tractor before because without low range it could not come up my driveway at ~27,000lbs in first gear with 4.88's. The engine is probably ~300rwhp on fuel as tuned for towing. It's just not in the cards. A torque converter on the other hand can produce TREMENDOUS volumes of driveline torque, and it's not actually destroying itself while doing it like a clutch disc is. Unloading a fully loaded gooseneck with 18 to 20+ round bales (no fun...) multiple times from our 550 and backing my 4R100 F-250 up under it so I could bring the hay that last 1/4 mile to the barn up the driveway has made it abundantly clear that a torque converter > clutch. If the 550 had low range I could use that. But the 250 doesn't need low range, nor does it even strain to pull the same load up the same hill. In the 550 I have to rev along, driving way faster than you would want on a twisty driveway, only to have it still go down and snuff out when you need it most because there simply isn't enough gear. Going from full power to nada and trying to get the brakes to hold enough to make your backward slide down the driveway somewhat manageable while you hang your head out the window is a game I've played plenty. I always want to think it can do it. And sometimes it can when the load is lower. But at full load, unless the driveway surface is peeeeeerfect, and I get no spin, it will not go up. This is with me hauling ass, and generally making a mess out of the whole ordeal, only to have it snuff out anyway. And this engine makes tons of low end power too. The engine is strong, the grade and gearing vs load just can't win. They don't come right out and say it, but obviously a manual trans tandem truck [i]could not[/i] start off on this hill without breaking something, or spinning down [i]and[/i] breaking something, if the clutch held and the engine didn't die. [URL="http://www.youtube.com/watch?v=Lq7T4ZnvqV8&feature=endscreen"]http://www.youtube.com/watch?v=Lq7T4ZnvqV8&feature=endscreen[/URL] I had a bunch of trucks coming in and out of a job just last week and the manuals were CONSTANTLY spinning down in the entrance, and the guys weren't driving dumb, they would hit it fast, and then eaaaaaaaase up on the pedal as the truck slowly lost speed to try and get over the hump and they would start hopping and spin down. The autos never spun, and never even slowed down. Just like this: [URL="http://www.youtube.com/watch?v=UvWPRpF_CTg"]http://www.youtube.com/watch?v=UvWPRpF_CTg[/URL] [/QUOTE]
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