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The 6 Speed Overdrive transmission is the latest in torque multiplication technology and in fact the strongest and most reliable available to date. Zodiac based the 6 Speed Overdrive transmission on their race proven 5 Speed design. Unlike your stock transmission, which has a 1:1 ratio in top gear, this transmission gives you a 1:0.86 gear ratio in 6th speed. This means less RPM to drive at the same speed, resulting in less vibration, less wear and tear, and better fuel economy. The Zodiac Six Speed features an improved shift system over the stock 5 Speed. The shift drum is not a cast part but a CNC produced precision part. The drum fork pin grooves have a more exact shifts, the plunger/compression spring detent system has been upgraded with a late style roller/torsion spring for smoother shifts, and the dynamic load rating of the shift drum bearings has been increased 100% for improved radial loading characteristics. The gears are as wide as in your stock 5 Speed transmission with an added .beefy. 6th gear for the main shaft and a one-piece 6th gear/counter shaft unit. All of this for uncompromised torque capacity and strength. Zodiac 6 Speed overdrive comes with a billet aluminum trap door. The complete 6 Speed transmissions are available for Softails in a black or natural aluminum Delkron housing or our reinforced and economical priced polished Softail housing, as well as for 1990 thru 1994 FXR models in Delkron housing. Other models and years can be built to order. The Zodiac transmission is stronger than anything available at present. The Zodiac gears are machined from Ultra Strong 20ChMnT High stress gear steel. This steel has superior strength over any other gear steel used in the aftermarket. Gears and shafts are tempered and stress released. The complete and ready to bolt-in 6 Speed transmission is based on the stock 5 Speed design, meaning there are no installation problems or frame modifications needed. The billet trap door features the electronic speed sensor hole, which can be plugged off (plug included), if a front wheel driven speedo is used. Offset transmissions come complete with all parts to offset the primary.

Unlisted 6 Speed Transmissions for FXR and Dyna models can be built on special order. Delivery time is approx. 10 days.

The use of an electronic speedo on a 6 speed transmission on 1994 to present models may require the use of a recalibration unit such as ZPN236690 or 236082.


Complete 6 Speed Transmissions, fit all 1990 thru 1999 Softail. Can also be used on 1985 thru 1989 models if used in combination with a 1990 to present clutch and a 1989 to present starter motor
Stock 25mm offset 45mm offset 55mm offset
700856 39 423,60 kr 700863 43 786,27 kr 700867 49 628,03 kr 701133 47 785,60 kr Plain housing
700858 40 110,30 kr 700865 44 090,97 kr 700898 48 896,33 kr 701134 50 167,70 kr Polished housing
700855 40 749,61 kr 700862 45 789,34 kr 700866 50 173,92 kr 701135 52 744,80 kr Black housing
Complete 6 Speed Transmissions, fit 2000 thru 2006 Twin Cam Softail models.
Stock 25mm offset 45mm offset 55mm offset
700860 49 101,69 kr 700920 40 479,55 kr 700949 57 717,76 kr 701137 61 207,03 kr Silver housing
700861 51 233,72 kr 700927 58 032,08 kr 700973 62 198,57 kr 701138 63 691,44 kr Black housing

Recommended Retail Prices include 25.00% sales tax.

Prices exclude shipping, import duties and installation.

Prices are based on EUR to NOK interbank rates obtained daily. The interbank rate is the rate that banks trade currency to each other. These prices must be used as a guide.