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Front Dana 30 - 27 Spline

Discussion in 'Intermediate CJ-5/6/7/8' started by Lockman, Jan 29, 2020.

  1. Jan 29, 2020
    Lockman

    Lockman My " Rosie" 2020 Sponsor 2019 Sponsor

    White City, NY 14617
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    I bought a Lock Right 2210LR . I received it today & the owner's manual says to pull the cover & determine if I have a 'thin' Ring or 'thick' Ring gear ??? I was led to believe that I did not need to pull the axles to install this unit ? I'm a little bummed that I have to now , in order to install it .
    Can anyone please give me a little encouragement on this ? Any way to know , right now, what type ring gear is in this factory differential ??????
    Kinda sour grapes here, 'cuz I had them pulled a couple of months ago , when I did my front Disk Conversion.......I do understand that if I have a " thin " ring gear , I leave the case in & only have to pull the opposite side axle ~ 2 inches or so ?
    Thanks,
    Richie
     
    Last edited: Jan 29, 2020
  2. Jan 29, 2020
    Ohiowrangler

    Ohiowrangler New Member

    Newark
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    thick ring gears are used when you install a lower gear(high number) ratio gear set on a higher ratio carrier(lower number). If your gears are stock, then I'd say you don't need to remove the carrier. You can also try to remove the gears from the carrier, if you can remove the them you are good to go, install the locker. Good luck, Ron
     
  3. Jan 29, 2020
    Ohiowrangler

    Ohiowrangler New Member

    Newark
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    Just reread your post, you are good to go on a factory gear set, Ron
     
  4. Jan 29, 2020
    Lockman

    Lockman My " Rosie" 2020 Sponsor 2019 Sponsor

    White City, NY 14617
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    Thanks, Ron....... I 've got 3.73 Gears in my '75. Question : How thin is " thin " & how thick is
    " thick " ????
    Btw, Your gonna like my ' Rosie' , she's pretty much a one of a kind. Look over my albums on here, if your interested.
    Richie--------Lockman
     
  5. Jan 30, 2020
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Sep 23, 2002
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    It’s a case, the carrier is the large cast section the axle tubes are pressed into.
    Regarding thick and thin gears, if you can remove the pinion shaft (spider gear shaft) without removing the ring gear you most likely have thin gears. If you have to remove the case and ring gear most likely you have thick gears. The axle shafts must be removed regardless as they spline into the side gears which are replaced by components of the locker.
     
    Last edited by a moderator: Feb 15, 2020
    Lockman likes this.
  6. Jan 30, 2020
    Lockman

    Lockman My " Rosie" 2020 Sponsor 2019 Sponsor

    White City, NY 14617
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    Thanks for the Refresher nickmil, Your an expert & I appreciate your reply . Like I said, It's sour grapes on my part ...... should of, could of, would of, Type of thing. :oops: Oh well. I'll get that done , eventually. Hell, I've just started the Trac-Loc in the rear end .
    Thanks again, Fellah's.
     
  7. Jan 30, 2020
    Ohiowrangler

    Ohiowrangler New Member

    Newark
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    I can get a measurement tonight. I have a set of stock dana 44 3.73 and a thick set of 4.10's for compareson. Ron
     
  8. Jan 30, 2020
    Ohiowrangler

    Ohiowrangler New Member

    Newark
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    Rosie's quite impressive, I worked at a buick dealership in the mid 90's. The grand national's were a lot of fun to drive. Ron
     
  9. Jan 30, 2020
    sterlclan

    sterlclan Member

    exploring the...
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    A gnx held the burnout record at the last dealership... till we tried a park avenue ultra with the supercharged 3.8. park avenue for the win. That thing would fry the tires till you let off.
     
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  10. Jan 30, 2020
    Ohiowrangler

    Ohiowrangler New Member

    Newark
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    I've always wanted to take a rear wheel drive 3800 from a Camaro and add a super charger from an ultra and bolt it in something light weight. But I never acquired enough parts. Ron
     
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  11. Jan 30, 2020
    Lockman

    Lockman My " Rosie" 2020 Sponsor 2019 Sponsor

    White City, NY 14617
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    .......Or you could use a GN Turbo 3.8 like in my CJ5
     
  12. Jan 30, 2020
    Ohiowrangler

    Ohiowrangler New Member

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    Both options would be intertaining
     
  13. Jan 30, 2020
    Ohiowrangler

    Ohiowrangler New Member

    Newark
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    I measured a standard thickness dana 30 ring gear, 4.10 ratio, it was 1.20" at the thickest part, plus or minus. Ron
     
    Lockman likes this.
  14. Jan 30, 2020
    Lockman

    Lockman My " Rosie" 2020 Sponsor 2019 Sponsor

    White City, NY 14617
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    Thanks Ron . Now.... do u think that's what the Lock- Right people would consider as Thin ? Anyway, I should call them in the morning.
     
  15. Jan 30, 2020
    Ohiowrangler

    Ohiowrangler New Member

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    it's a stock replacement gear, can't hurt to call, Ron
     
  16. Jan 30, 2020
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
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    I’m missing the debate? The axles need to slide out far enough that 2” or 2’ is no different, so the spindles are coming off. The case comes out with four bolts, and the ring gear is a few more bolts if needed. I guess I'm unclear on what the question is?
     
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  17. Jan 30, 2020
    Lockman

    Lockman My " Rosie" 2020 Sponsor 2019 Sponsor

    White City, NY 14617
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    According to MFG.er, I can leave the Case in. I only have to remove the ring gear side axle. Remove the ring gear , while inside the Carrier. , remove spiders & then install locker. No debate really....... just was seeking clarification.

    AMENDED 1/31/2020 :

    I wrote down wrong info above. I apologize for my confusion. Attached is PowerTrax Instructions.
    Lock Right Installation Info.jpg
     
    Last edited: Jan 31, 2020
  18. Jan 30, 2020
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
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    Interesting.
    It might just be me, but working inside that tight box sounds like more trouble than just pulling it apart to work on it. :shrug:
     
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  19. Jan 31, 2020
    '74Renegade

    '74Renegade Active Member 2019 Sponsor

    Fair Oaks, CA
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    Having done this recently I can't imagine laying on my back and doing this with the case installed. Pull the case and do this on the bench.
     
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  20. Jan 31, 2020
    Lockman

    Lockman My " Rosie" 2020 Sponsor 2019 Sponsor

    White City, NY 14617
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    I Hear you both......But I do have one ' Tool " at my disposal. I built a 3' 6" wide X 14' long X ~ 6' deep, concrete block 'Pit' about 20 years ago, when I built the Shop. It's visible in the Pic's below. I am pulling the case in the rear D44 & most likely end up doing the same on the front D30.
    Like I said , I was lead to believe , by the Lock-Right folks, that the front could be done in ~ 2 hours , case In ? We'll soon see.
    Thanks again guys........I'll let you know what transpires, in the next couple of weekends.
     

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