ATS Diesel 2007+ Dodge 68RFE Billet Transmission Upgrade Ki: Specs, Fitment, and Is It Worth It

The ATS Diesel 2007+ Dodge 68RFE Billet Transmission Upgrade Kit (313-802-2326) is a comprehensive rebuild and performance upgrade package for the 68RFE six-speed automatic transmission used in 2007.5 and later Dodge Ram pickup trucks equipped with the 6.7L Cummins diesel engine. The 68RFE was introduced as the heavy-duty automatic transmission option for the Ram diesel lineup, but the factory calibration and internal components have well-documented limitations under increased power and torque, including pressure regulation inconsistencies from the stock valve body, solenoid pack wear under high fluid temperature cycles, and shift quality degradation as the valve body bores wear over time. The ATS kit addresses the root causes of these issues in a single purchase: it includes a billet-machined valve body, the Co-Pilot transmission controller for precise line pressure and lockup management, and a complete transmission rebuild kit covering the friction elements, seals, and hard parts needed for a full internal rebuild alongside the billet components. This guide covers the ATS Diesel Transmission 68RFE upgrade kit specifications, year fitment, and how the full kit compares to individual component upgrades for the 68RFE platform.

Specifications and Fitment: 68RFE Billet Upgrade Kit

The 313-802-2326 kit is designed for 2007 and later Dodge Ram trucks equipped with the 68RFE transmission. A companion kit, 313-800-2326, is specifically labeled for 2007.5 and later 6.7L Cummins applications and covers the same transmission platform with fitment confirmed for the 6.7L engine pairing. Both kits address the same transmission unit and include three main components:

• Billet Valve Body: Machined from billet aluminum to tighter tolerances than the factory cast valve body; addresses the pressure regulation inconsistencies and bore wear that develop in the OEM unit over time and under high fluid temperature cycling; the billet construction eliminates the porosity present in cast valve body cores that can allow cross-leakage between circuits under pressure
• Co-Pilot Transmission Controller: An electronic line pressure and lockup controller that allows the driver to adjust transmission behavior for towing, performance driving, and normal street use; the Co-Pilot increases base line pressure above the factory setting to firm shift feel and improve clutch pack clamping force, which reduces clutch slippage under high-torque diesel applications where the stock pressure calibration is marginal
• Transmission Rebuild Kit: A complete set of friction clutch packs, bands, seals, O-rings, and associated hard parts for a full internal rebuild of the 68RFE alongside the billet valve body installation; performing the valve body upgrade during a transmission rebuild rather than in a stand-alone procedure amortizes the labor cost of transmission removal and ensures all wear items are addressed in a single service event

The 68RFE fits all Ram 2500 and Ram 3500 trucks with the 6.7L Cummins from the 2007.5 model year through the production years covered by this kit. Early 2007 Ram diesel trucks used the 5.9L Cummins with a different transmission, so confirming the engine and transmission type before ordering is the correct step. The 68RFE can be identified by the six-speed gear count on the gear selector and by the transmission identification tag on the driver-side pan rail.

Top Picks: ATS Diesel 68RFE Upgrade Options

For a complete 68RFE rebuild combined with the billet valve body and Co-Pilot controller, the ATS Diesel 2007+ Dodge 68RFE Billet Transmission Upgrade Kit - Valve Body and Co Pilot - Transmission Rebuild Kit (313-802-2326) is the full-package option covering all three components in a single purchase. The ATS Diesel 2007.5+ Dodge 68RFE Cummins 6.7L Billet Transmission Upgrade Kit w/ Co-Pilot (313-800-2326) is the 2007.5 and later 6.7L Cummins-specific variant with confirmed fitment for the 6.7L engine pairing. For builds where only the valve body upgrade is needed without a full transmission rebuild, the ATS Diesel 2007+ Dodge 68RFE Performance Valve Body (303-900-2326) provides the valve body upgrade as a standalone component for installations where the transmission internals are in serviceable condition and only the valve body requires replacement.

Match to the Build

• High-mileage 68RFE on a 6.7L Cummins build showing shifting inconsistencies and torque converter shudder: The full kit (313-802-2326) addresses the valve body pressure regulation failures and worn friction elements simultaneously; a 68RFE showing erratic shift behavior, delayed gear engagement, or torque converter shudder has typically developed both valve body bore wear and clutch pack degradation; replacing only one component and not the other leaves the remaining worn components to continue causing drivability problems; the complete kit covers both in a single rebuild event
• Performance Cummins build adding significant power above the stock 68RFE torque rating: The billet valve body and Co-Pilot controller together address the two primary failure modes for the 68RFE under increased torque -- insufficient line pressure allowing clutch slippage during hard acceleration, and valve body bore wear causing inconsistent pressure delivery; the Co-Pilot's line pressure adjustment capability allows the transmission to be tuned to hold the elevated torque of a modified 6.7L Cummins without clutch slippage while retaining smooth shift quality for normal driving
• 68RFE rebuild at a transmission shop where upgrading to billet components during the rebuild is the preferred approach: The ATS Diesel Transmission kit is designed to be installed during a complete transmission rebuild rather than as a stand-alone valve body swap; the rebuild kit friction components and seals come with the billet valve body and Co-Pilot in a single package, which simplifies ordering for a shop performing a full rebuild; all friction, seal, and hard parts needed for the rebuild are covered by the kit alongside the billet valve body
• Tow rig on the 68RFE platform experiencing transmission overheating and shift flare under heavy loads: The Co-Pilot controller's line pressure increase addresses the shift flare that occurs when the stock pressure calibration is marginal under high transmission fluid temperatures; at elevated temperatures, transmission fluid loses viscosity and the stock valve body pressure drops further, worsening shift feel and clutch engagement; the Co-Pilot's fixed pressure increase compensates for the temperature-related pressure drop and maintains consistent shift quality under sustained towing loads

Signs the 68RFE Needs Rebuild or Upgrade

• Harsh or delayed engagement when shifting from park or neutral into drive or reverse -- forward and reverse clutch pack wear causing delayed engagement as the worn pack requires more fluid pressure to engage; this symptom progressively worsens as clutch material continues to wear and the pack clearance increases beyond specification
• Shift flare under load -- the transmission momentarily revving between gear changes as if in neutral, then banging into the next gear; caused by insufficient line pressure during the shift sequence failing to engage the oncoming clutch pack before the offgoing pack releases; common on high-mileage or high-torque 68RFE units where stock pressure calibration is marginal
• Torque converter shudder at light throttle between 40 and 60 mph -- a vibration or shudder felt through the drivetrain when the torque converter clutch is engaging at light throttle; caused by contaminated or degraded torque converter clutch friction material; the rebuild kit addresses the converter clutch friction elements as part of the full rebuild
• Transmission fluid that has turned dark or smells burnt after a drain-and-fill service -- evidence of excessive clutch pack slip burning the fluid; burnt fluid accelerates wear on the remaining clutch material and solenoid pack components; a transmission producing burnt fluid under normal driving has already experienced significant clutch slippage and should be inspected and rebuilt before continued high-load operation

Frequently Asked Questions

Can I install the billet valve body without doing a full rebuild?

Yes -- the ATS Diesel 68RFE Performance Valve Body (303-900-2326) is available as a standalone component for transmissions where the internal clutch packs, bands, and seals are confirmed to be in serviceable condition. The full kit (313-802-2326) combines the billet valve body, Co-Pilot controller, and rebuild kit because the most economical time to upgrade the valve body is during a rebuild, since the transmission is already removed and disassembled. If the 68RFE has low mileage, no shift flare, and no slippage symptoms, and only the valve body requires replacement due to solenoid pack failure or bore wear, the standalone valve body is the appropriate purchase. If the transmission has mileage above 150,000 or is showing any slippage or shift quality symptoms, the full rebuild kit alongside the valve body upgrade is the more thorough approach.

Bottom Line

The ATS Diesel 2007+ Dodge 68RFE Billet Transmission Upgrade Kit (313-802-2326) is the complete solution for a 68RFE rebuild that addresses both the factory valve body limitations and the worn friction internals in a single purchase. The billet valve body eliminates bore wear pressure loss, the Co-Pilot controller provides adjustable line pressure for towing and performance use, and the rebuild kit covers all friction and seal components for a thorough internal rebuild. The standalone performance valve body (303-900-2326) is available for lower-mileage transmissions where a full rebuild is not yet required.