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GatorGuru | Diesel Therapy

Episode 20 | Built 68rfe Transmission by BD Diesel

You can have all the engine power in the world, but if you don't have a transmission to transfer the power to the ground, it means nothing, and that is where BD Diesel steps in. BD Diesel has had the 68rfe transmission figured out for years making them the premeir choice for this Ultimate Tow Truck Build.

The 68RFE coupled behind the Dodge/Cummins 6.7L engine represents a new breed of transmission that was built to take on the high torque and horsepower of the Cummins engine but only at stock specs.

There are many of those who have already pushed the limits of their transmission with performance enhancements and hauling heavy loads that know all too well how much is too much for the 68RFE. BD transmissions are designed to take on what most 68RFE owners are looking for responding with smooth sharp shifts to keep the engine in the torque range required.

The electronic controls of the 68RFE and 6.7L Cummins combination make the replacement of the transmission too complex for the backyard mechanic or small shop to perform special scanners, gauges, tooling and flushing machines are required to get the job done right within the warranty specifications without instant failures occurring. BD has set up an expanding network of installation centers that can supply and install your new BD 68RFE transmission.

Parts

  • 36-Months
  • 150,000 Miles

Labor

  • 12-Months
  • 24,000 miles

Note

  • No Race abuse covered. Remote filter required for inspection with a cooler flow rate in GPM at Oil/Air transmission cooler outlet.
  • BD torque converter must be installed at the time of installation of the transmission - use of a 3rd party or OE converter will invalidate the transmission warranty

Transmission

  • Hard anodized valve body and new solenoid pack installed in every unit
  • Custom valve body separator plate with gaskets increases line pressure while stopping internal cross leaks
  • Heavy duty cam & roller design low reverse one way clutch
  • New 4C billet spring retainer
  • Steel girdle added to 2C piston to allow for more clutches and broader apply area
  • BD durable QT100 pressure plates allow for increased clutch counts and reduce deflection and distortion within the clutch drum
  • Over Drive clutches 33% increase & 2C clutches 33% increase
  • Custom Big Stack overdrive shaft
  • BD reinforced accumulator plate
  • TCC limit valve machined and sleeved to address high wear area with in pump
  • BD Deep sump oil pan adds extra fluid and cooling capacity while reducing case flex
  • BD ProTech68 pressure control module ramps up line pressure to 250 psi using MAP sensor to input load and adjust pressure required
  • Performance Transmission but with the added touch of a Billet Input Shaft to take the "snap" from rapid throttle and high horsepower

Torque Converter

  • Triple Disc
  • Enhanced Stall - Street/Towing applications
  • Machined pistons
  • HD springs absorb shock of engagement
  • Stamp forged 1-piece cover
  • Eliminates warpage from clutch heat
  • Taller cover can be rebuilt more often
  • Trapezoid teeth design
  • Engineered tighter tolerances
  • Self-centering teeth design increases contact decreases wear and chatter
  • Thrust bearings - not plastic thrust washers
  • Riveting process ensures alignment & eliminates vibration or embrittlement from welding
  • Cast stator designs maximizes torque
  • New sprag components ensure long term durability
  • Furnaced brazed fins reduces internal leakage for improved fluid coupling efficiency
  • Reduced overall weight by 12lbs compared to competitors

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