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m22 rock crusher

Discussion in 'The Garage' started by bowtiewrench, Nov 7, 2004.

  1. bowtiewrench

    bowtiewrench Registered Member

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    Would an m22 rock crusher tranny bolt up to an np205 or np241? Also what 4 speed tranny came with a '69-'72 4x4 chevy truck? My buddy has I believe to be a 1970 1 ton that I could rob the tranny and t-case if its worth it. Thanks

    Alex
     
  2. sled_dog

    sled_dog 1 ton status

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    I have never seen an M22 used in a 4x4 application. I don't believe anyone makes the mounts to do it. Not sure I would see the purpose. The gear ratios don't exactly lend themselves to many offroad situations. Though I guess mudding it could. As for the 69-72 should be an SM420 4 speed. about a 7:1 first gear ratio, wish it came in a 32 spline version, I'd run one in my rig.
     
  3. Rolled

    Rolled 1/2 ton status

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    I saw one on ebay with an adapter for a dana 20 tcase...


    However, I would sell it and buy a sm465. The M22 is worth, far more, than the 465...
     
  4. atho

    atho 1/2 ton status

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    never heard of the M22 being used in a truck...

    The SM465 was introduced in 1968. It could have either the NP205 or the Rockwell T221 behind it. The NP205 was introduced in '69, but I have seen some '69s and even a handful of '70s that still had the Rockwell. My '69 GMC had the Rockwell, until it [censored] the bed.
     
  5. 70~K5

    70~K5 1/2 ton status

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    I had a 327 and a M22 from a Vette in a '46 CJ2A with a AA adapter to the spicer model 18. Worked great in mud and sand, not so good in other spots.
     
  6. diesel4me

    diesel4me 1 ton status Premium Member

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    Advanced Adapters used to make an adapter to put a car muncie in a 4x4,not sure if they still do-I was tempted to put one in my 72 K5 I had a long time ago,after swapping an SM465 into it from a TH350,I soon tired of the wide gap between second and third gear,and granny low was useless on the street(I only used it to crawl through the drive through at Macdonalds occasionally! /forums/images/graemlins/rotfl.gif)--I longed to be able to speed shift it like the M-22 my brother had in his 69 Camaro--I agree it might not be the best for off road,but for a street driven rig (without a lift or huge tires,unless you re-gear the rear ends)it would be very desireable in my opinion. /forums/images/graemlins/thinking.gif
     
  7. ben427

    ben427 1/2 ton status

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    Sled dog_ just a note, sm 465's were used from 69 up, with a straight shift lever.
     
  8. sled_dog

    sled_dog 1 ton status

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    hmm thought 465 started 72+ good to know
     

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