AS68RC Input Drum 2007-2010, new and ready to install. Fits the AS68RC. Ships fast from the USA.
This is the input shaft and drum assembly for the Aisin AS68RC six-speed used behind the 6.7L Cummins in 2007-2010 Ram 3500, 4500 and 5500 chassis cab trucks. As the photo shows, the long splined input shaft and the drum are one assembly. Buyers usually land here after a teardown turns up a cracked or burned drum, worn sealing-ring lands on the shaft, or a K1 pack that let go and took the drum with it, or after a work truck suddenly lost its lower gears.
Torque from the converter turbine comes in through this shaft, and the drum on its end carries the K1 clutch. In this transmission K1 is the clutch used from 1st through 4th gear, which means it is working nearly every time the truck pulls away loaded. The shaft also feeds apply oil to the drum through sealing rings that ride on the shaft and in the pump support, so worn ring grooves or a scored journal leak pressure away from the clutch piston. FCA's bulletin on the AS69RC and AS66RC, the units that replaced the AS68RC, shows how hard a K1 failure hits: a dislodged K1 snap ring sets P0731 and the truck loses 1st through 4th, while 5th and reverse still work. The repair calls for a new snap ring and, where it is damaged, the K1 input shaft drum sub-assembly. On the AS68RC, a drum or ring-land failure on this part shows the same pattern.
Read the codes with a scan tool that talks to the separate transmission control module, check fluid level and condition, and note which gears are missing. Losing only 1st-4th points at K1 and this drum, while losing 4th through 6th points at the K2 pack instead. Our gear ratio code diagnosis guide covers how to read P0731-type codes, and the Aisin slipping under load guide walks through the pressure and fluid checks. Rule out the internal wiring harness too, a known weak point on this family that can mimic a mechanical failure. Once the case is open, air-check the K1 piston through the shaft passages; a drum that will not hold air with good seals has a leak in the drum or the shaft.
This listing covers the AS68RC in 2007-2010 production. The AS68RC arrived with the 6.7 Cummins partway through the 2007 model year and was used in Ram 3500, 4500 and 5500 chassis cab models; most Ram 2500 and 3500 pickups of these years have the 68RFE, which this part does not fit, and 2013-up trucks moved to the AS69RC. Aisin made running changes during production, so compare shaft length, spline count and the sealing-ring layout against your old part, or send us your year and VIN and we will confirm it before it ships. See our 68RFE vs AS69RC comparison if you are not sure which unit your truck has. Every AS68RC part we carry is listed under hard parts.
| Fits | AS68RC 2007-2010 |
| Part type | Input Drum |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
The AS68RC was used behind the 6.7L Cummins in 2007-2012 Ram 3500, 4500 and 5500 chassis cab trucks. This listing covers 2007-2010 units. Most Ram 2500 and 3500 pickups of those years have the 68RFE, which is a different transmission.
That pattern points to the K1 clutch, which lives on this drum. On the sister AS69RC and AS66RC, FCA documented exactly that symptom from a dislodged K1 snap ring with P0731 set. Confirm the drum is damaged at teardown; sometimes only the snap ring and clutches need replacing.
Mopar ASRC fluid, or Mobil 3309, which is listed as its equivalent. Do not use ATF+4 or another Mopar fluid in this transmission.
New sealing rings, the K1 snap ring, K1 frictions and steels, and any worn thrust bearings or races. If the failure put debris through the unit, flush or replace the cooler and service the converter.
Compare shaft length, spline count and the sealing-ring layout with your old part, or send us your year and VIN and we will confirm fitment before shipping.
