JIMS® 4/5 conversion transmissions are designed to fit most 1970 - early 1984 Harley Davidson Shovelhead electric start models only. However, we do not consider our 4/5 transmissions to be a “drop- in” product. We offer them as custom transmissions, requiring installation by an experienced Harley mechanic.

These transmissions are shipped fully loaded with the finest components available by JIMS®, such as: gears with lead-in ramping and back-cut engagement dogs, close ratio 1st gear, precision machined and heat-treated counter and main shafts, chrome billet trap doors, chrome billet top and side covers, and JIMS® performance gaskets. See Additional Information below for fitment.

• Gears and shafts are CNC-machined from materials that exceed 8620 steel
• Hand-assembled and matched for a .0002" tolerance between the shafts
• Assembly includes chrome trap door, side cover, top cover and hardware
• All parts are made in the U.S.A. and assembled in JIMS Machining's technologically advanced facility