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Transfer Case Pros and Cons...

Discussion in 'The Garage' started by speedyvision917, Sep 14, 2004.

  1. speedyvision917

    speedyvision917 1/2 ton status

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    id like no to the different pros and cons to each transfer case sold in blazers or commonly swapped into blazers, and overall the best one and worst one. /forums/images/graemlins/waytogo.gif
     
  2. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

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    all opinion... but here's what I tend to think...

    np203:

    pro: ummm, well, they are cheap/common! half of it can be used for a doubler! lol! /forums/images/graemlins/wink.gif

    con: full-time tcase, heavy, the kinda case that gave chain-drive cases a bad name back in the day....

    np205:

    pro: built like a tank, can handle all the motor you throw at it, fixed yokes front/rear, high-spline-count output shafts available.

    con: heavy, only 1.95:1 low gear, some factory adapters are $

    np208:

    pro: lightweight aluminum case, 2.61:1 low gear, readily available/cheap.

    con: lightweight aluminum case, slip yoke rear output, chain driven, $pendy to SYE

    np241:

    pro: lightweight AL case, 2.72:1 low gear, common
    con: lightweight AL case, slip yoke, $ to SYE.

    Atlas:

    pro: 3 / 3.8 / 4.3 / 5 : 1 gear ratios available, high spline output shafts available, low gears without excessive drivetrain length.

    con: cha-CHING! less flexibility than a doubler with respect to the # of gear options you have on the trail.


    What is "best" depends on what you wanna do and what kinda $ you have. Doublers aside, the Atlas is prolly the best case... its also the most spendy. A np241 that has the SYE kit installed is a very good case... put a good skid plate on it to protect the aluminum case and you're set. I run/like the np205. At some point I may add a 203 or a Klune-V to it for lower gears and more gear options... but its a pretty good all around case. Big output shafts, twin-sticking is an option, tough case, strong gear-driven operation etc are all good things. Its only weakness is the gear ratio.

    all I can think of right now...

    j
     
  3. 84gmcjimmy

    84gmcjimmy 1 ton status

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    oooooo a quiz, let me try

    np208 (commonly stock)
    cons:
    -aluminum case
    -not very tough
    -uses a chain

    pros:
    combined with a th700 tranny, called "poor mans doulber"
    good low range



    np203
    pros:
    range box can be used for doubler

    cons:
    full time 4x4
    very heavy


    np205
    cons:
    not the best low range

    pros:
    all gear driven
    very tough
    very commonly swapped in along with 1 ton axles




    there are probably some things i left out /forums/images/graemlins/doah.gif
     
  4. 84gmcjimmy

    84gmcjimmy 1 ton status

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    DO! i forgot 2, and you beat me to it!!
     
  5. bajaviking

    bajaviking 1/2 ton status

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    NP203 - Very heavy and fulltime, I don't like it.
    NP205 - Very strong and reliable but low is not as low as the NP208.
    NP208 - Light weight aluminum casing, easy to find and good low range, not as strong as the others but strong enough for most normal abuse.

    My favorite - NP205 /forums/images/graemlins/waytogo.gif
     
  6. 84_Chevy_K10

    84_Chevy_K10 Banned

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    IMO if you're building a truck from scratch there are only two cases to consider, NP 205 or NP 241 if you're only going to be running one factory type case.
     
  7. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    243 too, geeze no one likes that one.
     
  8. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

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    [ QUOTE ]
    IMO if you're building a truck from scratch there are only two cases to consider, NP 205 or NP 241 if you're only going to be running one factory type case.

    [/ QUOTE ]

    how about the 4x case from the heep rubicon? /forums/images/graemlins/grin.gif

    j
     
  9. diesel4me

    diesel4me 1 ton status Premium Member

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    I liked the old Rockwell cases they used in the 60-66 GM trucks next best to the 205--they were pretty rugged,dont know about off road abuse,but the "divorced" 3 shaft style made it a favorite for 4x4 conversions--you could run any tranny you wanted in front of it with the appropriate shaft,the straight cut gears sounded like a blower--I had one in a 72 Chevelle Station Wagon with a 454 I bought from a friend that made it a 4x4 in 89--I still miss that thing!. /forums/images/graemlins/crazy.gif
     
  10. 84_Chevy_K10

    84_Chevy_K10 Banned

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    [ QUOTE ]
    [ QUOTE ]
    IMO if you're building a truck from scratch there are only two cases to consider, NP 205 or NP 241 if you're only going to be running one factory type case.

    [/ QUOTE ]

    how about the 4x case from the heep rubicon? /forums/images/graemlins/grin.gif

    j

    [/ QUOTE ]

    1. not factory to this application

    2. won't hold up in a fullsize from what i understand anyway

    I meant if I was going to use one stock case from the 73-87 trucks, I'd chose one of those two.
     
  11. atho

    atho 1/2 ton status

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    The Jeep Rubicon case is a variation of the NP241. Maybe the NP241J? The "Rock-Track" is bs naming by DC. Anyway, I remember reading an article in 4WOR about a company selling a conversion kit to retrofit this case into regular TJs and YJs. It is stronger than the regular NP241. The case has more fins and the gears are stronger, in addition to the 4:1 lo. Nothing specific about fullsizes, but I distinctly remember the article saying the rubi case was stronger. But, it only comes new in the Rubi.

    The Rockwell tcase is a good case IMO. I had one in my truck, it was apparently the last year for the T221 and the first year for the NP205 so its a tossup as to which t-case the assembly line could have pulled off the shelf. The Rockwell did ok DD'ing me for 1 year and a bit of offroading, but it leaked like a sieve, which I hear is a common problem. Right now its sitting in my garage, it needs a total rebuild as I ran it out of gear oil and all the bearings and seals crapped the bed. The little oil in it is silver in color from metal flakes /forums/images/graemlins/eek.gif A NP205 is going in its place.

    EDIT: THe Jeep case is the NV241OR.
     
  12. tree_entz

    tree_entz 1/2 ton status

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    well, i feel dumb: I didn't know that the 241 has a better low range then the 208 /forums/images/graemlins/doah.gif. So it was a good lessson.

    SO:
    -is there any other advantages of the 241 over the 208
    -if I have a 465/208 now, can I swap a 241 in?

    One last point:
    [ QUOTE ]
    combined with a th700 tranny, called "poor mans doulber"

    [/ QUOTE ]

    I thought the 465/208 was the poor man's doubler
    6.54x2.61=17.06 /forums/images/graemlins/thinking.gif
     
  13. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

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    AFAIK SYE kits are more readily available for the 241. Other than that and the lower low gear, I can't think of any advantages. Both are decent cases... get rid of the slip yoke and they turn into good cases. /forums/images/graemlins/wink.gif

    j
     
  14. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    241 SYE can often be liberated from a Ford cheaper than buying a kit, although likely having speedo issues (never checked).
     
  15. bshewmaker

    bshewmaker Registered Member

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    The rock trac is a variation of the t-case out of the 1ton rams 32 spline outputs 4 : 1 low ratio and you can buy adapters from a company named in 4wdor, cant remember, also its not a variation of the np241 because its not new process, its a NVG or New venture gear
     
  16. marv_springer

    marv_springer 1/2 ton status

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    [ QUOTE ]
    I thought the 465/208 was the poor man's doubler
    6.54x2.61=17.06 /forums/images/graemlins/thinking.gif

    [/ QUOTE ]
    [​IMG]
    208 * 2 = ..... 416..?!? /forums/images/graemlins/screwy.gif
    /forums/images/graemlins/dunno.gif
    Marv
     
  17. dremu

    dremu Officious Thread Derailer Premium Member

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    Re: Transfer Case Pros and Cons... *DELETED*

    Post deleted by dremu
     
  18. Blue85

    Blue85 Troll Premium Member

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    What is the point of bolting 2 208s together back to back? /forums/images/graemlins/dunno.gif /forums/images/graemlins/confused.gif
     
  19. marv_springer

    marv_springer 1/2 ton status

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  20. bshewmaker

    bshewmaker Registered Member

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    [ QUOTE ]
    [ QUOTE ]
    The rock trac is a variation of the t-case out of the 1ton rams 32 spline outputs 4 : 1 low ratio and you can buy adapters from a company named in 4wdor, cant remember, also its not a variation of the np241 because its not new process, its a NVG or New venture gear

    [/ QUOTE ]

    Umm, NP == NVG, same outfit, new name.

    -- A

    [/ QUOTE ]
    actually NVG is/was owned by diamler chrysler, but they just sold it to Magna International, Canada's largest auto parts maker. So NP does not = NVG. /forums/images/graemlins/deal.gif
     

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