how much more beefy is the 48RE

[Cummins Cowboy]

Apart from the obvious, frimer shifts and better holding gear ability how much better is the 48re over the 47re.

 

[JRG]

bigger shafts, same crappy converter.



JRG

 

[Matt400]

DTT did a nice write up with teardown, pics and explanation some time ago, maybe someone has a link for it.

 

[CUMMINZ]

30%

Factory specs say 30% better

 

[zstroken]

Convertors are different

 

[thejeepdude]

Convertors are different

List the ways that it's different, please.

 

[Cummins Cowboy]

is that link the same one that claimed there was a small flaw that could ruin the trans prematurely?? is this a problem or not??

 

[zstroken]

Shafts are the same size, convertor and input shaft have another seal, both carriers are different(I think eachone has an extra pinion and one is changed to steel from aluminum), extra clutch in the front clutch, more clutches inthe OD section, pump has a little more volume, valve body is different more line pressure, and I think capable of 2nd gear lockup. There are more changes but I can't remember them all

 

[thejeepdude]

Shafts are the same size, convertor and input shaft have another seal, both carriers are different(I think eachone has an extra pinion and one is changed to steel from aluminum), extra clutch in the front clutch, more clutches inthe OD section, pump has a little more volume, valve body is different more line pressure, and I think capable of 2nd gear lockup. There are more changes but I can't remember them all

Thanks for the followup, but I was talking about your reply that the convertors are different. You listed some changes of the transmission, but the question remains... what exactly is different with the converters? I'm just wondering because everyone I've talked to has said they're the same, although it wouldn't surprise me if there were a few minor changes just to adapt to the 48RE changes, but overall it's still the same major components from what I've heard... and it sure doesn't provide any more torque transfer than my 47's TC did.

 

[CUMMINZ]

changes

Some changes



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CUMMINZ NC

2004. 5 CTD, Pullrite, 2006 - 36' Cedar Creek, Tornado, TST, AMSOIL, 4x4, 4. 10LS, 315x70Rx17 BFG, 8" Factory cast aluminum, 2" front lift/w RC shocks, Line-X, Hellwig sway bar, Banks monster exhaust & High-RAM Intake,

My Truck at www.GoRowan.com/2004ram

 

[zstroken]

The convertor has a different design around the input shaft to help with lockup conditions.

 

[Reb.B]

they put a seal on the input shaft and a mating surface in the converter to help eliminate convertor drain back. The converter will not hold anymore power, in 05 the trans is much smarter and i think this will help the converter not slip as much. The 48re in 03 and above is a little smarter as well. When i say smarter i'm refering to the PCM. If you are towing heavy with extra power, you still need to stick a triple disk in front of it and call it good.