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manual vs automatic torque discussion

Discussion in 'Early CJ5 and CJ6 Tech' started by nyejos11, Mar 26, 2006.

  1. Mar 26, 2006
    nyejos11

    nyejos11 Member

    Emmaus, PA
    Joined:
    Dec 17, 2003
    Messages:
    384
    What do you guys think is the difference in torque output between:

    225 w/ manual trans and the 50-60 lb flywheel

    225 w/ TH400 and a 30-40lb (full?) torque converter (multiplies torque
    factor of 1.5 to 2 times ?)

    Josh
     
    nyejos11, Mar 26, 2006
    #1
  2. Mar 26, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    225 torque output won't change. :p

    What do you mean, what do we think?
     
    sparky, Mar 26, 2006
    #2
  3. Mar 26, 2006
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
    Messages:
    4,275
    Output of the 225 won't change, the difference is in what the rear wheels receive and when. IMHO, without putting one of each on a dyno and testing it ad nauseum, it's a rhetorical question. I'd ask guys who have wheeled both combinations and see what they think, otherwise, build what you want and enjoy it!

    YMMV, of course. R)
     
    w3srl, Mar 26, 2006
    #3
  4. Mar 26, 2006
    jd7

    jd7 Sponsor

    Nacogdoches,Texas
    Joined:
    Mar 30, 2004
    Messages:
    1,745
    This is the proverbial "seat of the pants" feel thing. I sure see a lot of the "rock buggys" have autos.
     
    jd7, Mar 26, 2006
    #4
  5. Mar 26, 2006
    nyejos11

    nyejos11 Member

    Emmaus, PA
    Joined:
    Dec 17, 2003
    Messages:
    384
    That is what I meant. How much is transfered to the wheels? Otherwise who cares? It is unuseable power if it doesn't make it to the wheels!
     
    nyejos11, Mar 26, 2006
    #5
  6. Mar 26, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Easier to control on rocks, less likely to stall, etc. For general trail use I prefer an manual so I can bumpstart and compression brake.

    If I did a lot of rock crawling I'd probably rethink that.
     
    sparky, Mar 26, 2006
    #6
  7. Mar 26, 2006
    chevyjeep

    chevyjeep Member

    Elkgrove, Ca
    Joined:
    Dec 17, 2005
    Messages:
    80
    The torque converter is contently slipping for smoother take off and gear change. Their are pluses and minuses to both side in four wheeling.
     
    chevyjeep, Mar 26, 2006
    #7
  8. Mar 26, 2006
    Phalanxx

    Phalanxx Jeep Newbie

    iraq, texas,...
    Joined:
    Jan 13, 2004
    Messages:
    363
    if you have a problem with stalling, try taking an a/c actuator and hooking a switch up to it. when you enter rocks or a crawl zone, simply flip the switch and itll hold rpm at a constant. that allows you to use one foot on the brake and one on the clutch, plus have compression braking.
    you can always adjust the rpm of your actuator.
    if your interested in a good compromise that is.
     
    Phalanxx, Mar 26, 2006
    #8
  9. Mar 26, 2006
    mb82

    mb82 I feel great!

    Charlottesville Va
    Joined:
    Mar 17, 2003
    Messages:
    2,706
    Less power will make it to the wheels with an Auto, especially an older design. Newer ones loose less power. Personally I hope I never have an auto in any vehical I ever own. My own personal expirence with them has been very bad.
     
    mb82, Mar 26, 2006
    #9
  10. Mar 26, 2006
    CJjunk

    CJjunk < Fulltime 4x4

    El Centro,CA
    Joined:
    Dec 26, 2005
    Messages:
    259
    I agree with mb82. When I put a Chevy 3.8 in my Toyota p.u. I did a little research. I read somewhere, and this was several yrs. ago, that the TH 400 lost 22 % power thru the drivetrain and the TH 350 lost 16 %. Everything is a compromise, can't have it all.
     
    CJjunk, Mar 26, 2006
    #10
  11. Mar 27, 2006
    general jeep

    general jeep New Member

    long...
    Joined:
    Aug 26, 2005
    Messages:
    16
    i have a 72cj5 with stock 304 swapped out t15 for a turbo 400 it feels like all 150 hp went with it. but i do like the autotragic better
    dave
     
    general jeep, Mar 27, 2006
    #11
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