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View Poll Results: Which would you choose?
Dodge 47RH 0 0%
Allison AT545 2 100.00%
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Old November 12th, 2013, 07:29 PM   #1
TBigLug
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Talking 47RH in MDT vs AT545

Basically looking at either tranny in a stock (read as one without a lot of $ sunk in it) configuration. Will the 47RH work in a 1992 Topkick behind a 5.9?

Might be picking up a low-pro TK that has a 366 and a 545 in it, currently has a 24' box on it. Truck will end up being either a crew cab conversion with a donor cab from a '94 C3500 with a flatbed or I'll keep the standard cab and add on a ~60" flat top sleeper. Either way it'll have a 10' flatbed with a gooseneck ball and pintle hitch on the back.

I would like to (someday) repower with a 5.9. Not a mega power hotrod, just something that can pull my 4H gooseneck and fifth wheel camper. No mountains and I'm happy going 60-65 down the highway. Furthest trip I'll ever make is to TX to visit my daughter, again, pulling a fifth wheel.

Everyone says that the AT545's are junk and only good for around town stuff. I don't have the money to shell out for an AT1545 or a 3060. So, according to all the Cummins guys the only option is a 47RH so I can have OD and a lockup converter. But, they are all referring to light duty (2500 & 3500) applications.

So to sum up all the ramblings of a mania c , which transmission (in a stock take-out format) would be best in your opinion and why?
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Old November 12th, 2013, 10:53 PM   #2
in2deep
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I have drove a rv with a 5.9 and a 545 non lock up all over the country, it sucks like really sucks, 63 is max on flat ground and the 12 valve is on the gov and defueling, I would go for a 6-9 speed, the amount of money you would sink in a 47rh to get it to live at that gcw isn't worth it,
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Old November 12th, 2013, 11:27 PM   #3
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A manual would probably work better but after my wifes shoulder surgery she can't throw a shifter out that far so it's gotta stay an auto. Only reason 545's there is cause that's what's in it now. I'd rather have a 3060, 1545 or at least a 643 but working with what's available.
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Old November 13th, 2013, 11:20 AM   #4
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well then id with a 545 and put gov springs in the 12 valve
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