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Existing tuners must have an option to modify transmission gear ratios in order to re-flash the ECM
Sizes: One-size-fits-all heads and egos
PN 39976-65B-BD fits 1965-2000 H-D Big Twin models
Heat-treated 8620 steel
They come standard on all BAKER 4-speeds
Spectro Gear Lube super glide sport Existing tuners must have anPicking the right transmission fluid ensures the life and durability of your transmission, thats why BAKER recommends a fully synthetic GL 5 rated gear weight oil of 75W 140. The Spectro Heavy Duty Platinum Transmission Oil is fully synthetic GL 5 rated and is formulated to significantly reduce gear noise and helps the transmission shift smoothly even when its cold. Learn more about Spectro here: https: spectro oils. com Fitment 32fl oz Bottle All