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3 speed trannies

Discussion in 'The Garage' started by ronnny3, Oct 5, 2004.

  1. ronnny3

    ronnny3 Registered Member

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    In the tech for a 73 blazer it list several 3 speed trannies. Which i have figured not many people have in 4x4s but how do you know what kind you have and to swap to a 4 speed what the adapter will bolt up to? It came from the factory 350 3 on the tree 205 44 front 12 rear with open 3.08 diffs. /forums/images/graemlins/dunno.gif
     
  2. atho

    atho 1/2 ton status

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    The NP205 behind the 3 speed has the same coarse 10 spline input shaft as the NP205 behind the 4 speed. IIRC, the adapter is different, but not sure on that. If the stock one didn't work, you'd just need the 4 speeds.
     
  3. Blazer1970

    Blazer1970 1/2 ton status

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    The 3 speed adapter will not work with a 4 speed.
     
  4. diesel4me

    diesel4me 1 ton status Premium Member

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    Yea,those 3 speed adapters are one of a kind--and very rare--I saw one in the junkyard a long time ago,it had the shifter made into the adapter,and this one had a Dana 20 transfer case like a jeep factory!--I've seen the 3 speed trannys with a 205 too,but only 1 in about 20 years of fooling with GM trucks!. /forums/images/graemlins/crazy.gif
     

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