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DD6: Direct Drive 6-Speed Complete Transmission

If you enjoy riding for long periods of time you will enjoy the quiet, vibration dampened, worry free riding that comes with this transmission. This is the transmission for the serious rider who enjoys putting on the miles each time he gets on his bike. With the silent smoothness, vibration dampening, and direct drive engineering, you and your bike will enjoy the long haul for years to come.

  • 1990-2006 Softail, FXR, Dyna and FLH/FLT

Bearing Door Type: All DD6 bearing doors have the same outer profile as a stock 5 speed so exhaust brackets, torque arms etc. fit like stock. The DD6 door comes with or without an ear. The ear door is for exhaust bracket mounting and does not fit 1993-2006 FL applications.

12mm Mainshaft: Call 517-339-3835 or chat with us via the website to ensure ordering accuracy.

    • Finding neutral is very easy with a redundant neutral detent
    • Shifter Pawl assembly with improved geometry for a perfect response and built in overshift protection for smooth shifting
    • 1st through 3rd gears are straight cut to prevent lateral tension in those high torque, short-used gears

    Bearing Door
    All DD6 bearing doors have the same outer profile as a stock 5 speeds so exhaust brackets, torque arms etc. fit like stock. The DD6 door comes with or without an ear. The ear door is for exhaust bracket mounting and does not fit 1993-2006 FL applications. Note the images below. The DD6 door bearings are larger providing 25% more dynamic load capacity than stock bearings used through 1998, also uses a 1/8″ bearing retainer plate instead of stock style snap rings.

    DD6 Bearing Doors

    DD6 vs. Stock Comparison

    Redundant Neutral System

     

    All DD6 bearing doors have the same outer profile as a stock 5 speed so exhaust brackets, torque arms etc. fit like stock. The DD6 door comes with or without an ear. The ear door is for exhaust bracket mounting and does not fit 1993-2006 FL applications.

    Shift System
    Our 6 Speed shift system with roller detent guarantees smooth shifts every time and our redundant neutral ensures  that finding neutral is a easy chore. We mount a plunger detent on the left side pillow block and cut a plunger track into the shift drum itself.  The plunger follows this track during operation (shifting) and when shifting into neutral pops into a pocket. This system lets you feel that you’re shifting into neutral. No more guessing.  Shift drum features more aggressive timing on the fork groove profiles and is case hardened to 58 Rockwell for wear resistance and crisp shifts. We built our reputation on smooth shifting 6-speed transmissions; our drum designs benefit from the engineering lessons learned.

     FL Case Differentiation

    To see an illustrated example of the differences between FL cases by year, please open the PDF here.

    Gearset
    All DD6 gearsets are made out of 8620 steel, gears are shaper cut before heat treat then precision ground with diamond coated tooling after heat treat (58-62 Rockwell ‘C’). This extra steps ensures not only a quieter gear pair, but enables much tighter backlash control. The gearset is a combination of helical and spur gears to yield silent gear operation. The dog teeth are backcut at a 1° angle to optimize the smooth shift possible, while standard gearsets are cut to a 4° angle.  The mainshaft is unique with 1st main gear being incorporated as part of  the shaft, the countershaft also features a unique 1-piece design with 6th gear.

     


    DD6 Gearset Layout


    Call 517-339-3835 or chat with us via the website to ensure ordering accuracy.

    Gears and Shafts Design


    DD6 Shift Forks

     

    Shift Forks
    Our investment cast shift forks are made out of 4140 then dipped in a hard chrome plate bath for wear resistance, also designed with oil reliefs to ensure proper lubrication and wear resistance on fork blades and shift dogs.

    Available No Cost Options

    • Standard Shift Drum (1-N-2-3-4-5-6)
    • N1 Shift Drum (N-1-2-3-4-5-6)

    Available at an Additional Cost

    • 27T Comp Sprocket, available on FL models for a more aggressive primary ratio. Not compatible on Softails or Dyna models due to the inner primary design.

     The DD6 comes in a stardard 3.24 or optional 2.94 1st gear 

    Standard Ratios
    1st Gear 3.77
    2nd Gear 2.56
    3rd Gear 1.87
    4th Gear 1.44
    5th Gear 1.15
    6th Gear 1.00
    Effective Ratios 
    1st Gear 3.24
    2nd Gear 2.20
    3rd Gear 1.61
    4th Gear 1.24
    5th Gear .99
    6th Gear .86

     

    Standard Ratios- shown above are without the 28 tooth comp sprocket
    Effective Ratios- shown above are with the 28 tooth comp sprocket 

    Builder’s Kit Part Numbers
    All Part Numbers Listed Are Standard (Effective) Gear Ratios

    PN Description Fitment
    DD411L DD6 Builder’s Kit 1990-97 Softail1991-97 Dyna
    DD411 DD6 Builder’s Kit 1990-94 FXR1990-97 FLT-FLH
    DD411SL DD6 Builder’s Kit 1998-99 Softail1998-00 Dyna
    DD411S DD6 Builder’s Kit 1999 FXR1998-00 FLT-FLH
    DD411PL DD6 Builder’s Kit 2000-06 Softail2001-05 Dyna
    DD411P DD6 Builder’s Kit 2001-06 FLT-FLH

     

    Builder’s Kit Notes

    • The DD6 is available with a 2.94 optional 1st gear ratio for higher horsepower applications. Change the middle numeral ‘1’ to a ‘0’. example: DD401P
    • The DD6 is not designed to be used in conjunction with belt drive primaries,auto chain tensioners or easy pull clutch kits.
    • Upgrade the DD6 builder’s kit to a reverse system Click Here for more details.

    Complete Build Part Numbers

    All Part Numbers Listed Are Standard (Effective) Gear Ratios

    PN Description Fitment
    DD014*2 DD6 Complete Transmission 2002-06 FLT-FLH
    DD014* DD6 Complete Transmission 2001 FLT-FLH
    DD914* DD6 Complete Transmission 1999-00 FLT-FLH
    DD814* DD6 Complete Transmission 1998 FLT-FLH
    DD714* DD6 Complete Transmission 1993-97 FLT-FLH
    DD013*L DD6 Complete Transmission 2001-05 Dyna
    DD913*L DD6 Complete Transmission 1999-00 Dyna
    DD813*L DD6 Complete Transmission 1998 Dyna
    DD713*L DD6 Complete Transmission 1991-97 Dyna
    DD912* DD6 Complete Transmission 1999 FXR
    DD712* DD6 Complete Transmission 1990-94 FXR1990-92 FLT-FLH
    DD911*L DD6 Complete Transmission 2000-06 Softail
    DD811*L DD6 Complete Transmission 1998-99 Softail
    DD711*L DD6 Complete Transmission 1990-97 Softail

     

    Complete Build Notes

    • The DD6 is available with a 2.94 optional 1st gear ratio for higher horsepower applications. Change the middle numeral ‘1’ to a ‘0’. example: DD401P
    • The DD6 is not designed to be used in conjunction with belt drive primaries,auto chain tensioners or easy pull clutch kits. 

     

     


    BAKER Case vs. Aftermarket

    Case Design
    The BAKER Softail case design had all leak potentials in mind during the design. We added stud pads to the inside of the case so that the thread holes for the transmission studs were blind holes, NOT through holes like some aftermarket brands. Looking at the image on the right you can see the difference.

     

    Recalibration Box PN 95E-56B

    Special Note

    • Speedo recalibration unit is required for electric speed sensor applications; PN 95E-56B.
    • A + 12MM mainshaft length is available for wide tire applications.

    Compare the DD6

    See the difference between other transmission kits and our DD6 and OD6.Click Here for a PDF file comparing our DD6 and OD6 gearset against other manufacturers.

    Click on the image to Compare the DD6 and OD6 gearsets

    Installation Videos

     

    Standard Gear Case Finish Examples (Not applicable to all products)

    Chrome

    Polished

    Raw

    Wrinkle Black

    These example finishes are intended to show the exterior treatments of cases, top covers and doors.

    TERM AND CONDITIONS                                                                                         

     

    BAKER Drivetrain reserves the right to change prices, terms or policies at any time without notice.

    Orders can be pre-paid using Visa, MasterCard, American Express, Discover or PayPal.

    All orders not pre-paid will be sent C.O.D. certified check or money order only unless pre-approved for company check acceptance.

    Any orders from outside the USA must be pre-paid in US funds via wire transfer; a $30 transfer fee will apply.

    Prices shown are F.O.B. Haslett, MI.

     

    LIMITED WARRANTY POLICY

     

    BAKER™ transmission assemblies, transmission kits, primaries, and oil pans are guaranteed to the original purchaser to be free of manufacturing defects in materials and workmanship for a period of 5 years from the date of purchase or up to 50,000 miles. BAKER™ clutches, kicker cover kits, belt drives, F6F kit, reverse systems, covers and accessories are guaranteed to the original purchaser to be free of manufacturing defects in materials and workmanship for a period of 2 years from the date of purchase or up to 24,000 miles - whichever occurs first. If the product is found by BAKER™ to be defective, such products will, at the option of BAKER™, be replaced or repaired at cost to BAKER™. 

     

    In the event warranty service is required, the original purchaser must call or write BAKER™ immediately with a description of the problem. If it is deemed necessary for BAKER™ to make an evaluation to determine whether the transmission assembly or transmission kit or accessory is defective, the entire transmission assembly, whether originally purchased as an assembly or kit, must be properly packaged and returned prepaid to BAKER™ with a copy of the original invoice of purchase. If after an evaluation has been made by BAKER™ and a defect in materials and/or workmanship is found, BAKER™  will, at BAKER™  option, repair or replace the defective part of the assembly. 

     

    RETURNS AND EXCHANGES

     

    Any merchandise returned for any reason (exchange, credit or modification) must be accompanied by a Return Goods Authorization (RGA) number or it will be refused. Call BAKER™ to obtain this number prior to returning goods for any reason. There is a 15% re-stocking fee for all returned items. BAKER™ is not liable for any shipping charges. 

     

    ADDITIONAL WARRANTY PROVISIONS

     

    NOTE: Limited warranty does not cover labor or other costs or expenses incidental to the repair and or replacement of BAKER™ products.

     

    This warranty does not apply if one or more of the following situations is judged by BAKER™ to be relevant: BAKER™ OEM transmissions; (these are subject to the OEM manufactures warranty only), Improper installation, accident, modification (including but not limited to use of unauthorized parts, transmission oils or lubricants), racing, high performance application, mishandling, misapplication, neglect (including but not limited to improper maintenance), or improper repair. 

     

    BAKER™ shall not be liable for any consequential or incidental damages arising out of or in connection with a BAKER™ transmission assembly, transmission kit, component or part. Consequential damages shall include without limitation, loss of use, income or profit, or losses sustained as the result of injury (including death) to any person or loss of or damage to property.

     

    BAKER™ transmissions, transmission kits and accessories are designed exclusively for use in American V-Twin motorcycles. BAKER™ shall have no warranty or liability obligation if BAKER™ parts are used in any other application.

     

    If it is determined that a BAKER™ product has been disassembled during the warranty period for any reason, this limited warranty will no longer apply unless you were instructed to do so by a BAKER Drivetrain technician for diagnostic purposes.

     

    The words H-D®, Softail®, FXR®, Dyna®, FLT®, FLH®, Sportster®, and Buell® are registered trademarks and are for reference only.

     

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    DD6: Direct Drive 6-Speed Complete Transmission
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