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1970 cj-5

Discussion in 'Early CJ5 and CJ6 Tech' started by aaronwoodward, Jan 31, 2010.

  1. Jan 31, 2010
    aaronwoodward

    aaronwoodward New Member

    Bowling Green KY
    Joined:
    Oct 22, 2009
    Messages:
    7
    Hey all, just wanted to update... I asked for some help a while ago, and received some advice.
    I picked up my 1970 CJ-5 for a song last fall, it wouldn't turn over, transmission wouldn't do anything but reverse, no brakes, and the body was in rough shape.
    Well, I fixed the transmission, T-90 tranny I believe, the clutch sleeve was backwards. I got the engine running, it's a 1976-77 dauntless v6, the starter was locked up, idler-screw was nearly maxed out, and the coil on the h.e.i. distributer was bad. I also replaced some brake lines.
    So in all, I've spent $70 on parts, $100 on gas (to get the jeep), and $400 on the car I traded for the jeep.
    Yesterday I got the timing set right, and then took the jeep out wheeling in the snow here in KY! It performed admirably, minus a few small issues. I pulled a car hood and a snowboarder around for a while with it. That dauntless runs like it was freshly rebuilt (may have been!), we ragged it out for a few hours and it ran like a charm! I think it may have hit 30 mph tops. Its geared 4:88, with a 3 speed T-90 tranny. Any ideas on the best way to increase the speed?
    Thanks all!
    Aaron
     
  2. Jan 31, 2010
    alex211

    alex211 Member

    Pennsylvania
    Joined:
    Aug 25, 2009
    Messages:
    441
    There was no such thing as a 1976-77 dauntless v6. The dauntless 225 was from 1966-71.

    Buick made an even-fire V6 in 1977 though.
     
  3. Jan 31, 2010
    wasillashack

    wasillashack Member

    Wasilla, Alaska
    Joined:
    Mar 17, 2008
    Messages:
    269
    Bigger diameter tires-$$, Warn or Saturn overdrive-$$$,regear the axles-$$$, watch this board,deals on all this stuff appears occasionally, it may be economically feasible to swap out front/rear axles for 3.73/4.10/4.27 ratio axles, a good V6 should be capable of 50-60MPH easily with 4.88's. You must have very small diameter tires?
     
  4. Jan 31, 2010
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
    Messages:
    8,360
    Even 5.38's with 28" tires will do better than 30.
    Are you in low range?
     
  5. Jan 31, 2010
    Chris Insull

    Chris Insull All roads lead me back to the beach... 2023 Sponsor 2022 Sponsor

    Chesapeake, VA.
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    Sep 22, 2002
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    805
    Same thoughts here...
     
  6. Jan 31, 2010
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
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    Mar 29, 2007
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    Yep in low range also.
     
  7. Jan 31, 2010
    Bob Greenslade

    Bob Greenslade Member

    Roseville CA
    Joined:
    Sep 15, 2008
    Messages:
    232
    Maybe its a 231 even fire V6
     
  8. Feb 1, 2010
    66cj5

    66cj5 Jeep with no name

    NorthWest Indiana
    Joined:
    Sep 10, 2003
    Messages:
    2,084
    1970 should be t14, not t90. broken speedo? or shift out of 2nd gear.
     
  9. Feb 1, 2010
    kaiser_willys

    kaiser_willys Well-Known Member

    Joined:
    Jan 7, 2007
    Messages:
    1,524
    :iagree: heck my f134 will do better than 30 mph and it has 5:38's
     
  10. Feb 2, 2010
    aaronwoodward

    aaronwoodward New Member

    Bowling Green KY
    Joined:
    Oct 22, 2009
    Messages:
    7
    So... Everyone has a dumb moment, right? I'm used to my old f150 that has 2wd, 4wd-hi and 4wd-lo. I just figured if it didn't have a hi-low, that it was the same gearing. It's been snowy since I've had it running, so today was the first time I put it in 2wd, and... it runs normal road speeds. Speedo isn't working yet, I was just guessing on the speed, but it is a 4wd with low gearing, and 2wd with normal gearing. I know the t90 wasn't stock with the 70 cj-5, but that is whats in it, rebuilt it myself. 1254083 is the casting number on the engine block, obviously not stock for the body. But it sounds like an odd-fire, and according to the dauntless casting numbers page, it matches the numbers for a 77 odd-fire, or even fire.
    Thanks for the help, and I'll get some pictures up soon!
    Aaron
     
  11. Feb 2, 2010
    kaiser_willys

    kaiser_willys Well-Known Member

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    Jan 7, 2007
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    I wouldnt say that necessarily, maybe not with a v6, but my 1970 cj5 with the:hurrican: came that way, and i was told that the single stick d18 wasnt a option either:rofl: who know what kaiser used in the last year or two for suremehh
     
  12. Feb 2, 2010
    alex211

    alex211 Member

    Pennsylvania
    Joined:
    Aug 25, 2009
    Messages:
    441
    The T90 was used with the 4 cylinder.

    There was no such thing as a 77 odd fire V6, it was even fire by then. Jeep quite producing the V6 in 1971.
     
  13. Feb 3, 2010
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
    Sep 23, 2002
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    12,529

    Not quite true. Early '77 GM used up the leftover odd fires. By the end of '77 they were using the even fire engines. This means a '77 231 could be either odd fire or even fire depending on when the engine was installed, early or late. I've run into both in '77 cars that were bone stock and there are listings for both in my AERA engine casting #'s book. I also have fsm's that show both in '77.
     
  14. Feb 3, 2010
    crscrkcj

    crscrkcj New Member

    Tennessee
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    Feb 3, 2010
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    Well I guess we can all learn a thing or two hanging around the early CJ-5 site. Good stuff!!!
     
  15. Feb 3, 2010
    alex211

    alex211 Member

    Pennsylvania
    Joined:
    Aug 25, 2009
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    441
    I new it was something goofy like that, I thought the odd-fire was phased out by 77. Thanks for the info.

    It's just like the in cab gas tank and flanged axles right around 1970. My jeep has 2 piece axles and the in cab tank, my friends 1970 has flanged axles and the in cab tank also.
     
  16. Feb 3, 2010
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Yup, mid year and production changes can really throw you for a loop. That's when ordering parts on newer cars getting the build date for the vehicle is almost mandatory.
    My Daughter's '70 HAD tapered axles and under seat tank also.
     
  17. Feb 3, 2010
    Smoke

    Smoke New Member

    Graham Washington
    Joined:
    Oct 26, 2009
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    I got a 70 CJ5 with a dauntless odd fire with 4:88's. However I also have a SM465 and in 3rd I can do better than 30mph, 4th I can easily get 50-60. Good luck and wheel it.
     
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