Sproradic fansubber Dead Fish Fansubs have released the first 6 episodes of first Super Sentai series.
Dead Fish Fansubs is known for randomly selecting episodes of numerous tokusatsu shows such as Kamen Rider Stronger, Juukou B-Fighter and Taiyou Sentai Sun Vulcan. The next show to get such treatment is Himitsu Sentai Go Ranger (translated as Secret Task Force Go Ranger), however this time DFF has released the first six episodes. The release is highly recommended as it is the first in the long well known Super Sentai series. The show is also famous for starring Hiroshi Miyauchi as AoRanger, who previously played Kamen Rder V3 and went to later on star as Big One(J.A.K.Q.) and Naoyuki Miura(Ohranger).
Journey over to his site to download. Episodes 2 and 5 are currently down to deal with an encoding error.