ATS Built 68RFE Transmission Package

XDP Price: From $6,056.25 to $7,528.75
Manufacturer: ATS Diesel

Application:
07.5-12 Dodge 6.7L Cummins 68RFE

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Starting in 2007.5, the new 6.7 Cummins was paired with the 68RFE 6 speed automatic. The transmission features two additional gears, more aggressive gear ratios than a 48RE and its operation is synced with the factory exhaust brake. These features addressed many of the improvements Dodge owners wanted. The downside is that expenses, features and power-holding capabilities were spared during its creation.

The most common failures in 68RFE's are overdrive clutch failures, the low sprag failing and torque converter slip/failure. Any of these failures can present themselves when adding 60hp or more over stock. Unlike previous Dodge transmissions, upgrading hard parts-only does not fix the problem. Ultimately, the transmission is controlled by the TCM and electronic control is a must to build a reliable 68RFE.

ATS started R&D in 2007.5 and spent countless man hours and resources re-designing and strengthening the platform. This began with building our Five Star converter for the transmission. It features a billet cover, five square tab lock-up clutches, billet stator, furnace brazed impeller, billet piston and HD bearings – all stalled to the Cummins torque curve. Capable of handling 2500 ft/lbs of torque, this torque converter will handle whatever is thrown at it.

Next, we removed the plastic low sprag and replaced it with a metal clutch. Due to physical limitations inside the transmission, there is no way to make it physically larger. However, we bypass its use when paired with the Co-Pilot, thus eliminating failures between 1st and 2nd gear.

For power levels over 400hp, the clutch packs needed to be addressed. ATS built 68RFE's feature extensive machining to the pressure plates to add:

  • The Under Drive (Forward) clutch pack surface area is increased by 21%, using single sided clutch plates.
  • The Over Drive clutch pack surface area is increased by 17%, also using single sided clutch plates, this allows for better clutch control when overdrive is used at higher power levels.
  • The 2C clutch pack surface area is increased by 34%, using double sided frictions.
  • The 4C clutch pack surface area is increased by 34%, using double sided frictions.

At this point, we needed to look at the valve body and build it around what our Co-Pilot controls featuring higher lines pressure. The 68-RFE uses a non-synchronous, clutch-to-clutch design. This means that the shifts from gear to gear must be timed perfectly thereby releasing and applying a friction clutch to achieve a flawless shift. Because of the sensitivity of the hydraulic circuits, we heavily modified many areas of the valve body. Hydraulic oil flow is ported to certain clutch packs where additional pressure is needed. The accumulator piston seals have been redesigned to ensure hydraulic pressure integrity. The accumulator plate is made of high-grade material to compensate for the additional pressure that the accumulator pistons and springs exert during heavy power situations.

To round out the modifications, we developed the 68RFE Co-Pilot to control line pressure, clutch timing, bypassing of the low sprag, and added nearly double the line pressure seen on a stock transmission. In many ways, the stock calibration and limitations within the TCM prevent a bulletproof 68RFE from existing. The ATS Co-Pilot eliminates these restrictions. Our Co-Pilot comes standard on all 68RFE transmission packages and automatically controls all the features needed to have a reliable 68RFE.

All ATS 68RFE's come with our deep pan. The pan adds extra fluid, features an aluminum-finned design, magnetic drain plug and is tapped for a temperature probe. One of its most important benefits is that it adds rigidity to the case. 68RFE's are known to have excessive case-flex, which results in a cracked bellhousing, tailshaft or main section. The ATS Deep pan eliminates flex and works towards avoiding a cracked case. ATS offers various stages to the 68RFE platform to meet certain power levels and uses. Contact ATS to discuss which stage transmission would be best for you. Regardless of how much power the truck makes, how it is used or which stage you select, all ATS 68RFE’s come backed with a 5 year / 500,000 mile warranty.

Stage 2 Transmission:

  • ATS Built 68RFE Auto Trans
  • ATS 5-Star Viskus Clutch Drive Torque Converter
  • ATS Extra Deep Transmission Pan
  • ATS CoPilot Torque Converter Lock-Up Controller

Stage 3 Transmission:

  • ATS Built 68RFE Auto Trans
  • ATS 5-Star Viskus Clutch Drive Torque Converter
  • ATS Extra Deep Transmission Pan
  • ATS CoPilot Torque Converter Lock-Up Controller
  • ATS Billet Flex Plate

Stage 4 Transmission:

  • ATS 5 Star Viskus Clutch Drive Torque Converter
  • ATS Extra Deep Transmission Pan
  • ATS CoPilot Torque Converter Lock-Up Controller
  • ATS Billet Flex Plate
  • ATS Billet Input Shaft


All ATS Transmission Packages come standard with a  5-Year / 500,000 mile warranty

Build Date Guide:
07.5-09 Transmission: Trucks built from Feb-07 to Jul-09
2010+ Transmission: Trucks built from Aug-09 to Jul-12

Truck Freight Item: Allow 1-2 Weeks for delivery. Truck freight charges apply.


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