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OD6: Overdrive 6-Speed Builder's Kit

* Limited supply of chrome bearing doors available. Please give us a call at 517-339-3835 to order a chrome bearing door.
This is the ORIGINAL 6-speed design that revolutionized the American V-Twin industry. Yet, it’s still the best overdrive 6-speed built to this day…hands down. Our OD6 is built to comfortably handle the power from today's big-inch motors. This transmission is rated for motors putting out up to 165ft/lbs of continuous use. It is available as a complete transmission with a wide variety of case options and configurations, or as a builder’s kit for your stock case application, which requires little to no modification. The BAKER OD6 is available with many optional gear ratios to match your engine torque and riding style.
If you are looking for a transmission replacement with a tapered mainshaft, we offer a 5-speed gearset and 5-speed complete transmission.
  • Billet 6061-T6 bearing door
  • 1/8″ thick bearing retainer plate
  • Redundant Neutral smooth shift system
  • Hard chrome plated shift forks
  • Diamond cut gearset made out of 8620 steel
  • Optional Gear Ratios
  • All transmission seals, gaskets and hardware
  • 5 year limited warranty

Benefits

  • Stronger than stock
  • Lower RPM for smoother highway speeds
  • Fuel efficiency
  • 1990-92 FLT-FLH
  • 1990-97 Softail
  • 1990-94 FXR
  • 1991-97 Dyna
  • 1999 FXR
  • 1998 Dyna
  • 1998-99 Softail
  • 1999-00 Dyna
  • 2000-06 Softail
  • 2001-05 Dyna
  • 1993-97 FLT-FLH
  • 1998 FLT-FLH
  • 1999-00 FLT-FLH
  • 2001 FLT-FLH
  • 2002-06 FLT-FLH

 ** If you have the CVO Screamin' Eagle bike with the Factory Hydraulic side cover, please give us a call at 517-339-3835.

 

       

      Bearing Door
      OD6 bearing doors are a 1/2″ wider at the mounting flange then a stock 5-Speed door due to the 6th gear. The OD6 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 OD6 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.

       

      The FLT® style exhaust bracket that bolts to the lower part of the side door using the four 5/16 screw holes in the case may have to be modified. Since the surface in which this bracket mounts to is .525” thicker than stock, experience shows that .525” should be laterally taken out of the exhaust bracket to keep the exhaust pipe in the O.E.M. position. Modified brackets are available through BAKER™  if you do not have a hack saw and welder at your disposal. (PN 188-6)

       

      OD6 Ear & No Ear Bearing Door

      OD6 Bearing Door vs. Stock

      Thickness Comparison

      Redundant Neutral System

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

      Gearset
      All OD6 gearsets are made out of 8620 steel, gears are 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. This tighter control on the gears yield a silent operation. 

      Ratios
      The OD6 comes in a standard 2.94 configuration. A way to physically tell which ratio you have is pretty common knowledge here at BAKER, but if you would like to know look at the 1st gear pair on the gearset. Our standard 2.94 1st gear will not have a notch on the 1st countershaft gear, our (stock) 3.24 1st gear will have a single notch around the center of the 1st countershaft gear. Use the image on the far right for reference. This is very important to know if you need any replacement parts or components.


      OD6 Gearset Layout

      OD6 1st Gear Ratio

      The OD6 Ratios 

      Standard Ratios
      1st Gear 2.94 
      2nd Gear 2.21
      3rd Gear 1.60
      4th Gear 1.23
      5th Gear 1.00
      6th Gear .86

       

      OD6 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)
      • Reverse Pattern Shift Drum (6-5-4-3-2-N-1)  

      Builder’s Kit Part Numbers
      All Part Numbers Listed Are Standard 2.94 Gear Ratios

      New PN Old PN Description Fitment
      OD6-401 401 OD6 Builder’s Kit 1990-92 FLT-FLH, 1990-97 Softail, 1990-94 FXR, 1991-97 Dyna
      OD6-401S 401S OD6 Builder’s Kit 1999 FXR, 1998 Dyna, 1998-99 Softail
      OD6-401SP 401SP OD6 Builder’s Kit 1999-00 Dyna
      OD6-401P 401P OD6 Builder’s Kit 2000-06 Softail, 2001-05 Dyna
      OD6-402 402 OD6 Builder’s Kit 1993-97 FLT-FLH
      OD6-402S 402S OD6 Builder’s Kit 1998 FLT-FLH
      OD6-404SP 404SP OD6 Builder’s Kit 1999-00 FLT-FLH
      OD6-404P 404P OD6 Builder’s Kit 2001 FLT-FLH
      OD6-404P2 404P2 OD6 Builder’s Kit 2002-06 FLT-FLH

       

      Builder’s Kit Notes

       

        -We started providing install DVD’s with every builder’s kit starting in October 2012. At approximately 3:25 of the OD6 portion of the DVD, Bert talks about modifying the shifter pawl. This modification is related to the stock shifter pawl lever assembly (H-D PN 34972-02B) and the use of BAKER 5-6QSN & 5-6QLN shift drums. We now provide a shift drum BAKER PN 124-0D6, which supercedes the 5-6QSN, 5-6QLN Shift, 5-6QEN, 5-6QFN & 5-6QGN shift drums, that requires no shimming and works with BAKER shifter pawl 555-56C or 555-56LD (depending on year or motorcycle) which we include in kits and on all BAKER complete builder’s kits. We do not sell any kits, shift drums or transmissions that require any shifter pawl with BAKER marked on it, that needs to be ground or modified anyway. Any questions, please call us at 877-640-2004. 

        Complete Build Part Numbers

        All Part Numbers Listed Are Standard 2.94 Gear Ratios

        New PN Old PN Description Fitment
        OD6-701 701 OD6 Complete Transmission 1990-97 Softail
        OD6-702 702 OD6 Complete Transmission 1990-94 FXR, 1990-92 FLT-FLH
        OD6-703 703 OD6 Complete Transmission 1991-97 Dyna
        OD6-704 704 OD6 Complete Transmission 1993-97 FLT-FLH
        OD6-801 801 OD6 Complete Transmission 1998-99 Softail
        OD6-803 803 OD6 Complete Transmission 1998 Dyna
        OD6-804 804 OD6 Complete Transmission 1998 FLT-FLH
        OD6-901 901 OD6 Complete Transmission 2000-06 Softail
        OD6-902 902 OD6 Complete Transmission 1999 FXR
        OD6-903 903 OD6 Complete Transmission 1999-00 Dyna
        OD6-904 904 OD6 Complete Transmission 1999-00 FLT-FLH
        OD6-003 003 OD6 Complete Transmission 2001-05 Dyna
        OD6-004 004 OD6 Complete Transmission 2001 FLT-FLH
        OD6-0042 0042 OD6 Complete Transmission 2002-06 FLT-FLH

         

        Speedo Recalibration Unit

        Special Note

        • Speedo recalibration unit is required for electric speed sensor applications; PN 95E-56B. 

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

        Click on the image to Compare the OD6 and DD6 gearsets


        OD6 vs. DD6


        Recommended Fluid / Level

        Picking the right transmission fluid ensures the life and durability of your transmission, that’s why BAKER recommends a fully synthetic GL-5 rated gear weight oil of 75W-140. If a GL-5 rated gear lube is not available, these commonly carried viscosities (weights) will work 75W-90, 75W-140 and 85W-140. BAKER does not recommend the use of Syn3 (20W-50). For Bert’s  article on ‘Oil & Spiders’  Click Here 

        • BAKER OD6 Fluid Capacity Dry: 22-24fl-oz
        • BAKER OD6 Fluid Capacity Wet: 18-22fl-oz

        Learn more about Spectro Performance Oils here: https://spectro-oils.com

         Installation Instructions

        OD6 installation instructions with exploded views:Click Here

        OD6R Exploded View Diagram addendum:
        OD6R Addendum with exploded views:  Click Here

        Installation Note:

        We started providing install DVD’s with every builder’s kit starting in October 2012. At approximately 3:25 of the OD6 portion of the DVD, Bert talks about modifying the shifter pawl. This modification is related to the stock shifter pawl lever assembly (H-D PN 34972-02B) and the use of BAKER 5-6QSN & 5-6QLN shift drums. We now provide a shift drum BAKER PN 124-0D6, which supercedes the 5-6QSN, 5-6QLN Shift, 5-6QEN, 5-6QFN & 5-6QGN shift drums, that requires no shimming and works with BAKER shifter pawl 555-56C or 555-56LD (depending on year or motorcycle) which we include in kits and on all BAKER complete builder’s kits. We do not sell any kits, shift drums or transmissions that require any shifter pawl with BAKER marked on it, that needs to be ground or modified anyway. Any questions, please call us at 877-640-2004.

        1st Gear Design Change

        1st Gear Change Addendum-March 2012: Click Here

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

        Raw

        Polished

        Wrinkle Black

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

        TERMS 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 and transmission builder 's kits, 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, whichever occurs first. All other BAKER products 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, except for the following; Warranty does not cover clutch plate wear, throw out bearing failures or mainshaft breakage due to improper clutch nut installation.Electrical components carry a 30-day warranty; cosmetic finishes (chrome plating, hard anodizing, powder coating) are covered for 60 days. Certain promotional products may carry a shorter warranty as specified at the time of purchase. 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 purchase invoice. If after evaluation by BAKER a defect in materials and/or workmanship is found, BAKER will, at their option, repair or replace the defective part of the assembly.

        RETURNS AND EXCHANGES

        Returns are permitted within 90 days of the delivery date. 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.

        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 manufacturers 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.



        OD6: Overdrive 6-Speed Builder's Kit
        Move your mouse over image to zoom. Click to enlarge.
        OD6: Overdrive 6-Speed Builder's Kit OD6: Overdrive 6-Speed Transmission Builder's Kit for 1986-up Harley-Davidson OD6: Overdrive 6-Speed Builder's Kit OD6: Overdrive 6-Speed Builder's Kit
        Customer Reviews
        4.6 Based on 23 Reviews
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        SG
        05/27/2022
        Steve G.
        United States
        • What model motorcycle do you ride? 1997 Harley Davidson Heritage Softail

        Well thought out kit. Awesome product

        I bought a OD6 kit for my 97 Heritage. Wow what a difference. Whole different bike now. Very smooth, easily finding neutral is a pleasant new experience. I'm not a Harley mechanic but own a fleet of excavating machinery and am pretty mechinanically inclined. With my degree from Baker YouTube University, I did the installation myself. Very helpful people. I highly recommend their products

        A
        04/05/2022
        Anonymous
        United States United States
        • What model motorcycle do you ride? Dyna Wide Glide

        Awesome 6 speed

        I would recommend this transmission harley-davidson 94 dyna Wide Glide

        TA
        03/29/2022
        Thunder A.
        United States United States

        quality at it's best

        this is the best, hands down product in the industry.

        A
        06/22/2021
        Anonymous
        United States United States
        • What model motorcycle do you ride? Building 5 bikes rite now shovelhead dyna panhead knucklehead and a race bike with 155” vtwin from rr cycles

        The never ending ride

        The quality of your transmission are priceless they take the worry out of that part of the motorcycle as well as the helpful people that work for bakerdriveline great support they always call back just like they say they will for technical ⚙️⚙️⚙️ or problems with an order

        MM
        06/18/2021
        Marianne M.
        United States United States
        • What model motorcycle do you ride? 2000 Roadking

        Roadking

        Awesome and easy to order. Fast shipping. What a difference in the ride.

        Web Product ID: 5231837187
        Baker Drivetrain Team Illustration