48RE Tcc Solenoid 2003-2008, remanufactured and ready to install. Fits the 48RE. Ships fast from the USA.
Ram 2500 and 3500 Cummins owners land on this page searching for a 48RE TCC solenoid because the converter will not lock up, shudders at highway speed, or the engine dies when the truck is put in Drive. Read this before ordering: this listing is not a loose solenoid. The product photo shows a complete remanufactured 48RE valve body with the solenoid pack and its harness already mounted, which is the right buy when the lockup problem lives in worn valve bores rather than in the solenoid coil. If you only need the solenoid, the 48RE OD/TCC solenoid pack is the loose part.
On the 48RE the TCC solenoid is only the switch. Once it opens, oil runs through the TCC timing and apply valves, the lockup boost valve and the converter switch valve before it reaches the converter clutch. Sonnax's 48RE vacuum test guide ties wear at those valves to TCC slip under load, TCC cycling, no lockup, overheated converters, burned overdrive clutches and gear ratio codes. A new solenoid bolted to a valve body with worn bores still leaks apply oil, so the shudder or slip returns. Replacing the whole valve body covers the solenoid and the bores in one job.
Sonnax's Jim Dial describes two differences from the 46RE and 47RE: the pressure regulator raises line pressure about 22-28 psi when lockup or overdrive is applied, versus roughly 10-15 psi on the older units, and the TCC solenoid is fed from the manual valve in any Drive position so the converter can lock in manual 2 and manual 1 while towing. Transmission Digest adds that because the feed is forward-clutch oil, a restricted TCC solenoid can apply the converter as soon as Drive is selected and stall the engine. Sonnax also warns that a 46/47RE valve body swapped into a 48RE may seem fine at first but tends to come back with a failed converter clutch or overdrive clutch, so a correct 48RE casting matters.
Test the solenoid pack and its ground first; if the coils check good and the truck still slips in lockup, the valve body is the next suspect. A stall in Reverse as well as Drive means the pump or cooler, not this part. Our OD and TCC solenoid testing guide walks through it, and 48RE Cummins transmission problems covers what else wears out alongside the valve body.
Listed for 48RE transmissions from 2003 to 2008, the four-speed in Cummins-powered Ram 2500 and 3500 trucks. Within that span 2003-2004 trucks use a throttle valve cable while 2005 and later use an electronic throttle valve actuator on the case, so confirm that the throttle lever and governor connector match your truck, or send your year and VIN before it ships. More parts for this unit are on the 48RE parts page.
Pair it with a 48RE shift kit if you are rebuilding for heavy towing.
| Fits | 48RE 2003-2008 |
| Part type | Tcc Solenoid |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is a complete remanufactured 48RE valve body with the solenoid pack and harness installed, as shown in the product photo. If you only want the solenoid, choose the loose OD/TCC solenoid pack.
Sonnax warns against it. The 48RE has a different pressure regulator curve and TCC feed circuit, and a 47RE valve body tends to lead to converter clutch or overdrive clutch failure.
It fixes shudder caused by worn lockup and TCC valve bores or a failed solenoid. A converter with a damaged clutch lining will still shudder and needs to be replaced separately.
It is listed for 2003-2008, but early trucks use a throttle cable and later trucks use an electronic actuator. Match the throttle lever and connectors to yours, or send your year and VIN.
Refill with ATF+4, check the level hot, let a 2005-later truck calibrate the throttle valve actuator with the key on, then drive through several lockup cycles.
