Has anyone heard of an Allison trans that fits on a '98 Dodge Ram 24V. I want to change the exhaust (4") and chip in my 24V for more HP and torque and was told by the mechanic to make trans changes or I would be asking for trouble. Someone else suggested an Allison trans vs a new torque converter and valve body of my stock Dodge trans.

 

pmmorris46,
I never heard of this swap. But who knows if it does, someone will let you know.
The question is WHY?
A good triple disc converter & i minor upgrade is all you need. My truck puts out 350 hp & 1007 tq with just these mods. Why would you go to anything else & invite trouble?
IMHO
MY WORLD

 

My dad is setting a 99 24v with an Alison t1000 behind it in his motor home right now. He bought all the parts to go from the Cummins to the Alison from the Cummins and Alison dealers. I would have to get up with him to see about part #s. It ain't cheap i can tell you that much. The Alison he got was reman. with all the parts I think he has tipped $5,000 and still has to buy a computor from alison to control it.

 

There is no "G" in Cummins

 

Unless you're talking about a town in Georgia.

 

WOW!

You could buy a bulletproof trans from ATS or DTT or your favorite vendor and stilll have money left over!

The Allison is good, but not THAT good.

 

Back in about 96 or 97, when I first had trouble with my auto/Dodge, I talked with Allison trans. I was told they didn't make an auto with Over drive. But are designing one for the Chevy people to be announced in a year or so.
So, it appears the Allison that chevy uses is the only OD trans they make. And it doesn't have a very good reputation.
Just have yours built right and it will go a long way.

 

Sorry didn't know i was here for the spelling bee I can't spell worth anyting so I don't bother proof rading either.

 

I wonder if a alison takes more horsepower to turn it... Like a GM turbo 400 eats more horsepower than a GM turbo 350

 

Our work trucks have 8.3 with allison automatics behind em.....thats not that much more of an engine than our *little* 5.9s..I've heard of it done.

 

http://www.piersdiesel.com/TruckClub.../TruckClub.htm

 

I currently have a 2004 4X4 Ford Excursion with a modified QSB5.9 marine engine and the Allison 3200 TRV equipped with a retarder.

There are some real issues to deal with when converting the Cummins to an Allison. The Allison weighs 625 lbs, holds 29 quarts of oil, and is only rated to handle 370 horses without MAJOR upgrades. The Ford body had to be lifted 2.35" to clear the transmission housing, and the suspension another 4.5" to keep the sump out of harms way, and then a NP205 cast iron transfer case had to be installed for the four wheel drive (so it is noisy).

The other problem with the 6 speed Allison is the limitation on engine rpm. The Allison is only rated for a max of 2,800 rpm, and the QSB spins up to 4,000. So, spinning the transmission up where I need it presented another set of opportunities (costs).


I have converted 12 valve Cummins powered Dodges to the 4 speed 5XX, 6XX, and 7XX series Allison transmissions, but again there are transmission hump problems, and the Dodge body is a real pain to lift above the frame to gain the needed clearance. On the Dodge, the other opportunity of challenge is that of where to put the exhaust. The SAE adaptor needed to mate the transmission to the engine places the rear motor mounts on each side of the bellhousing. So, exhaust routing is a real problem. Those transmissions easily handle 3500 rpm, so are not as limiting as the newer 6 speeds.

My recommendation is to visit www.dieseltrans.com and simply purchase a proven unit that just bolts in the Dodge.

 

I agree with RCW. While there may be a few advantages to replacing a stock 47RE with a stock Allison, if you are turning up the HP you'll have to build either one for it, so economically it will be cheaper to just build the heck out of the 47RE instead of converting to Allison.

Chris

 

I've seen guys selling 48RE's for about 2K if you are so inclined to swap to that unit.

 

I totally agree with RCW and allision has a higher percent rate of failure than your Dodge transmission to boot.

A couple of more places to check into for quality transmissions or parts.

www.suncoastconverters.com
www.gbtransmissions.com
www.atsdiesel.com