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BAKER 4-Speed Transmission '36-'86 Big Twin
BAKER 4-Speed Big Twin Transmission
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4-SPEED Model:

Transmission Case Finish:

Shift Drum:

4-Speed Side Cover:

4-Speed Top Cover:

4-Speed Mainshaft:

Starter Ear:

Off Set:

Sprocket or Pulley Size:

The introduction of the Knucklehead and the 4-speed in 1936 marked an epoch in the history of American motorcycles. Many consider the period of 1936-84 the holy grail of Harley fuckin Davidson. To carry on that legacy we developed the BAKER 4-speed, available with ratchet top or jockey top lids. The external architecture of our cast (A356-T6) 4-speed transmission case was modeled after factory cases to capture all the details and character of the original design. But we made many functional upgrades to address shortcomings of the original design like leaks, serviceability, and durability. The loose rollers on the main drive gear were replaced with a radial ball bearing. The bronze bushings on the gearset were replaced with caged needle bearings. We added a provision, hidden in the back of the case, for an electronic speedo but retained the traditional worm gear speedo provision on the front of the case. The stock Fred Flintstone shift detent was replaced with a snot-slick linear ball bearing detent for that smooth ‘snick-pop’ shift quality you expect from us.

- Vintage sand cast (A356-T6) design that holds true to the original 1936 through mid 1980's.
- Hidden transmission vent designed into the Ratchet and Jockey Top covers
-Billet steel machined and case hardened shift systems (FL, FX and N1) that rotate on Permaglide bushings, for a smooth repeatable shift each time; see technical section.
- BAKER Klassic Gears come standard.
- Modern 4 speed gearset made out of 8620 gear steel.
- Gears ride on needle bearings, not bronze bushings.
- Vintage cast kicker cover with traditional H-D styled early (PN 37310-39) cone throw out bearing with 1 piece release rod.
- Direct bolt-in on most models; see technical section for instructions and 65-69 fitment.
- 5 Year limited warranty

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