So I have an 03 2500 with a 5 speed. It has 4.10 gears and it is a 235 hp engine. I had been told that the 235's got the 10.5, but I thought the 10.5 had a 3.5" axle tube. My truck has a 4" axle tube. An help would be great. Thanks

 

Mine is labeled in the glove box, on the sticker. If not there Mag-Hytec web site has good descriptions with photos.

 

What he said.

 

Thanks I forgot about the glovebox label. I have a 11.5. I guess that is good and bad. Good it is the bigger axle, Bad the Power Wagon e-locker won't fit. Thanks Again!