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Detroit Locker Whats Normal

Discussion in 'Early CJ5 and CJ6 Tech' started by FugginJim, Jun 3, 2009.

  1. Jun 3, 2009
    FugginJim

    FugginJim In control Sometimes Sponsor

    Norco California
    Joined:
    Nov 22, 2004
    Messages:
    365
    Ok so I purchased a used Detroit locker from fleabay. Swapped out my truetrac for this. The jeep has some very pronounced bad road manners now which is ok if this is normal. The rearend seems like there is a lot of play as far as the yoke actually rolls back and forth before engaging. I mean about 1/4 turn. Ive checked backlash and tooth pattern and these are set at factory specs. Is this normal? And if it isnt are ther parts available to rebuild this. It is a 30 spline Dana 44 Flanged rearend.
     
  2. Jun 3, 2009
    Dummy

    Dummy I kick hippies

    Escondido, CA
    Joined:
    Dec 5, 2004
    Messages:
    647
    Did you check backlash with the old carrier before you put in the new Detroit? You wanna try to get it close. I'm sure you're okay as long as you're in factory specs.

    Yeah, they suck on-road. Plain and simple. The extra play in the pinion is normal. That's the space between the gear teeth being taken up. Some other niceties to look forward to:

    Tire chirping/squealing around corner
    Possible need to turn the wheel to the left when letting off the throttle and right turn when back on.
    A huge, clanging "BANG" out of nowhere that scares the S&%$ out of you (it's just the locker teeth tumbling into mesh under load - happens every now and then and is normal - won't harm anything)
    Chatter/weird drivetrain on/off/on/off bucking feel even with clutch in while trying to coast into a parking spot.
    More....

    They're great off-road, but they do come with a world of quirks on-road. I recently yanked the Detroit out of the back of my YJ 'cause I had enough. Put an E-Locker in its place. Like a whole new Jeep.

    Not trying to discourage you, but I really do recommend a limited slip, selectable locker, or a spool in the rear of any short wheelbase (under 101-inch) Jeep. I hardly notice the Detroit in the rear of my M-715, but a YJ or a CJ will really get tossed around by it.
     
  3. Jun 3, 2009
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
    Joined:
    Jul 30, 2003
    Messages:
    7,837
    don't know about the play in your axle, but having followed a lot of Jeeps with a Detroit in the rear on pavement, I would say the road manners sounds typical to me.
    The Jeeps seem to jerk one way or another at just a touch of the throttle.
     
  4. Jun 3, 2009
    FugginJim

    FugginJim In control Sometimes Sponsor

    Norco California
    Joined:
    Nov 22, 2004
    Messages:
    365
    Seems like all the above, I dont use it much on road but yeah 1st time I took her for a ride after the installation there was a terrible clank scared the heck outta me thought maybe the rearend fell out. But made me and my son definitely look at each other, and grin one of those oh S&%$ grins and hoping everything was okay.
    Thanks for the info Christain
     
  5. Jun 3, 2009
    Posimoto

    Posimoto Hopeless JEEP Addict Sponsor

    Minden, Nevada
    Joined:
    Aug 7, 2003
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    4,470
    Ya get used to it.
     
  6. Jun 3, 2009
    FugginJim

    FugginJim In control Sometimes Sponsor

    Norco California
    Joined:
    Nov 22, 2004
    Messages:
    365
    Yep pretty much the way it reacts pretty interesting ride. But boy can she climb even better than before.
    Thanks Jim
     
  7. Jun 3, 2009
    cj6/442

    cj6/442 Sponsor Sponsor

    Fallbrook, Calif
    Joined:
    Feb 6, 2008
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    2,705
    completly normal, it will climb till it falls over.(I know!)but the faces on the people in the parking -lot is the best...some even jump!!!!. aired down it is a hand full but aired up it is better.
     
  8. Jun 3, 2009
    FugginJim

    FugginJim In control Sometimes Sponsor

    Norco California
    Joined:
    Nov 22, 2004
    Messages:
    365
    So your good at this fallin over stuff I just need a cage so I can practice safe falling
     
  9. Jun 4, 2009
    aallison

    aallison 74 cj6, 76 cj5. Has anyone seen my screwdriver?

    Green Cove...
    Joined:
    Nov 24, 2006
    Messages:
    1,778
    The noise is not what you need to worry about, those are kind of fun.

    Watch the rear end on rain slick streets or on the snow. If there is not enough tracton to "unlock" the rear, it can very easy completely break free and you will be looking the other way very quickly.
     
  10. Jun 4, 2009
    Dummy

    Dummy I kick hippies

    Escondido, CA
    Joined:
    Dec 5, 2004
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    647
    Rain? Snow? Enough with those old wives' tales and urban legends.
     
  11. Jun 4, 2009
    nickmil

    nickmil In mothballs. Sponsor

    Happy Valley, OR
    Joined:
    Sep 23, 2002
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    11,467
    r)r)
     
  12. Jun 6, 2009
    BajaEdition

    BajaEdition cj6 owner

    Riverside CA
    Joined:
    Feb 16, 2009
    Messages:
    194
    I may be a bit late, but getting a detroit from ebay and you do not know how old it is, such as a newer designed soft locker or a older unit. Anyway the newer units are a lot friendlier. That said a detroit is an acquired taste, and once you get the taste in mouth you deside it is not that bad. the payoff is the offroad no thought performance, and the strength of the detroit. My first dedtroit and I shocked, then I kinda got used to it, now I run detroits front and rear. but then I have gotten used to bangs and unplanned lane changes.
     
  13. Jun 6, 2009
    jzeber

    jzeber Well-Known Member Sponsor 2019 Sponsor

    Morgan Hill, Ca
    Joined:
    Nov 15, 2003
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    Every once in a while mine will let go with a "bang" just to remind me it is there, wakes you up real fast. With that being said you get used to it and I would not trade it for anything!
     

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