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View Poll Results: Which would you use?
Allison AT545 2 66.67%
Dodge 47RH 1 33.33%
Voters: 3. You may not vote on this poll

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Old 11-12-2013, 06:03 PM   #1
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Join Date: Sep 2006
Location: Jackson, MI
Posts: 18
Question 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?

Also, any advice on the cab conversion or a good place to find a used sleeper is appreciated!

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Old 11-13-2013, 10:44 AM   #2
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Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 15,559
JMHO: After dealing with and owning tow units with 46RH & 47RH transmissions.
I'll throw in that reverse gear ratio is these transmission's weak point.
When loaded to GCVW, you will have trouble getting them to back up if there is any incline involved, like trying to start out forward in second gear.
Only thing that saved my TV trans; on many occasions; was the fact that both were 4X4, and low range operation took care of the issue.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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