Replaces the cracked or worn 4x4 tailshaft housing that mounts the NP271 or NP273 transfer case to the 48RE on 2003-2009 Ram 2500/3500 Cummins.
A cracked or broken housing at the back of a 48RE is one of those failures that leaves a good transmission unusable. If your 2003-2009 Ram 2500 or 3500 4x4 is weeping ATF where the transmission meets the transfer case, or the housing split after a hard hit or a bad driveshaft vibration, this is the cast aluminum overdrive extension housing (Mopar calls it the transfer case adapter) that replaces 5093166AA and 5093166AB.
On four-wheel-drive Rams the 48RE does not end in a long tailshaft like the 2WD trucks. Instead this short adapter housing bolts to the back of the overdrive section, carries the output shaft and its bearing support, and gives the transfer case a flat flange to bolt to. It holds the transfer case in line with the transmission, so any crack lets the two move against each other and lets fluid out. The NP271 and NP273 cases bolt straight to it. The weight of the transfer case hangs off this flange, which is why the casting takes so much abuse when the truck is worked hard.
Clean the area and run the truck with dye, or just wipe it down and look again after a drive. A leak that is only at the rear seal is a seal job, not a housing. A crack in the casting, a broken mounting ear or a damaged bore is the housing. Before you put a new one on, check the driveshaft U-joints and slip yoke: a failing U-joint sends vibration straight into this casting and is a common reason they crack, so fix that too or the new housing will be next. Our 48RE Ram 2500 common problems guide and the Ram 3500 version cover what else wears on these trucks while you have it apart.
Fits 2003-2009 Dodge Ram 2500 and 3500 4x4 with the 48RE behind the 5.9L or 6.7L Cummins, and the 2003 8.0L V10 gas trucks, when equipped with the NP271 or NP273 transfer case. It does not fit the NP241. Mopar shows 5093166AB as the current number replacing 5093166AA, and the castings are also stamped 22770GA. A word of caution on 6.7L trucks: most 6.7L pickups came with the 68RFE six-speed, which uses a different case, so make sure yours has the 48RE four-speed. 2WD trucks use a different extension housing. If you are not sure, send us your year and VIN, or look at the full 48RE parts catalog.
| Fitment | 2003-2009 Dodge Ram 2500/3500 with 48RE, 5.9L/6.7L Cummins; 2003 8.0L V10 gas |
| Transfer case | NP271 and NP273 4WD (does not fit NP241) |
| OE part numbers | 5093166AA, 5093166AB, 05093166AA, 05093166AB, 22770GA |
| Material | Cast aluminum |
| Weight | 11.82 lb |
| Warranty | 12 months |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. This housing is made for the NP271 and NP273 transfer cases used on 2003-2009 Ram 2500 and 3500 4x4 trucks. The NP241 uses a different adapter, so check the tag on your transfer case before ordering.
Yes for ordering purposes. Mopar lists 5093166AB as the replacement for 5093166AA, and this housing replaces both. Some castings also carry the number 22770GA.
The usual causes are driveline vibration from a worn U-joint or slip yoke, hits to the transfer case off-road, and the weight of the transfer case hanging off the flange. Inspect and replace worn U-joints when you fit the new housing, or the vibration that cracked the old one will go to work on the new one.
No. You transfer your existing output shaft and snap ring into the new housing. Use a new gasket and fresh seals on reassembly so the repair does not leak.
Only if the truck actually has the 48RE four-speed. Most 6.7L Rams from mid-2007 on came with the 68RFE six-speed, which needs different parts. Check the transmission ID tag or send us your VIN and we will confirm.
