Hi all,
I have a 2003 Ram 3500 Cummins SLT Heavy Duty, AT, quad cab short bed, 3.73 rearend, manufactured 08/2002 in case any of this matters. I know there are several different auto transmissions offered with this truck, (47-something, 48-something?) How do I tell which trans I have? I tried looking for a label during my last oil change, but didn't see anything. That being said, I didn't know where to look either.

 

Should be a 48RE.

 

^ Yup ..... the output on the "new" HO engine (305hp) included the switch to the 48RE.




Kris

 

carefull... if it was built in the date period he wrote there Aug 2002, it could be a 47RE.
There should be a metal tag or stamping on the drivers side near the shifter mechanisism which could tell for sure. Get the degreaser and a rag and see. If it's gone, short of opening it up you're screwed.

 

Look in glove box thier is a lable that tells you. Thier is in mine and do not believe ven no. mine says it is 47re but know for a fact it is 48re.

 

I thought the few 3rd gen 47RE's were all on 2500's?

 

Only 3rd gen SOs could have come with 47re's. All HO auto trucks had the 48re until the 68RE came out. Some of the 03-04 SOs came with 48re's too....
The OP has not told us if he has an SO or an HO truck.
BTW, my glove box gives me both codes for the different transmissions and also a third trans code. It's pretty stupid.....

And I had an 03 SO 3500 that had the 47re. It also had the bigger front axle....

 

Oh, sorry. It is the SO (250hp). So am I looking at the 47re?

 

Fill this out and ask for your build sheet...

http://www.dodge.com/wccsapp/universal/D/index.jsp

 

Its a 47RE, the 48RE did not go into production until 01-2003 for SO or HO.