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axles and t-case opinions

Discussion in 'Early CJ5 and CJ6 Tech' started by pitmonkey, Jul 28, 2012.

  1. Jul 28, 2012
    pitmonkey

    pitmonkey Member

    Oklahoma
    Joined:
    Feb 27, 2008
    Messages:
    74
    I have a 44 rear d18 t98 and a 27 front. I picked up in a deal a30 front t-18 Trans mated to a d-300t case with a Dana44 centered rear and an AMC20 rear. Motor is a 231odd fireout of my original Jeep purchase. Will be a street legal Wheeler but not a daily driver. Going to run 33 our 34 tires. Goingto have to buy gears how ever I go. What do you think for the best combo? The AMC and the center rear 44 have the one piece axle swaps done already.
     
    pitmonkey, Jul 28, 2012
    #1
  2. Jul 28, 2012
    shmober

    shmober Member

    eureka ca.
    Joined:
    May 10, 2011
    Messages:
    64
    Sell the 20 keep the 44, 4.10s might be good with the 6 cyl. I have mostly the sane setup in my flaty, with the exception of the motor being a 4 cyl and 4.88s. Have you thought about the over all drive train length? I have a Dana 20 t-case on mine and it comes out quite Long. I have a t18 with a novack adaptor on it, it will be even longer if you use the 300. Rear drive line length will be very short and steep.
     
    shmober, Jul 28, 2012
    #2
  3. Jul 28, 2012
    shmober

    shmober Member

    eureka ca.
    Joined:
    May 10, 2011
    Messages:
    64
    Didn't notice you'd is a CJ6 so you'll probably be ok
     
    shmober, Jul 28, 2012
    #3
  4. Jul 28, 2012
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
    Sep 23, 2002
    Messages:
    12,529
    4.56 or 4.88. I like my 5.38 but quite low for hiway driving.
    The decision on which would be determined by terrain you have in your area and will be traversing. I'd suggest also 4.27 but can be hard to find and/or expensive.
    Oh, and get rid of the AMC 20 like said above. The 44 rear is head and shoulders above it.


    Sent from my iPhone using Tapatalk
     
    Last edited: Jul 28, 2012
    nickmil, Jul 28, 2012
    #4
  5. Jul 28, 2012
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
    Messages:
    5,470
    Personally - after messing with rigs for years I love the combo I have SM465/D18/OD/4.88s. I get a great crawl ratio @80:1 and can run 70 hwy if I want (usually 60 - 65).

    The T18 is equal to the T98 and close to the SM465, and the T98 is more valuable to some folks with other limits.

    I know alot of folks really like the D300 (we are putting one in my boy's Scout and I have helped alot of folks with them over the years). Personally, I like the OD option of the D18. With the right gear in the axle you can get back to the low crawl of lower axle ratios with a 4:1 kit or other options while still haveing some range in Hi with a D300.

    I put them all in an excel sheet and compared the numbers based on rigs I had experince with to get the final setup I really wanted.
     
    Warloch, Jul 28, 2012
    #5
  6. Jul 28, 2012
    pitmonkey

    pitmonkey Member

    Oklahoma
    Joined:
    Feb 27, 2008
    Messages:
    74
    How dose the math work for this combo? High and low. T18 d300 5:38s with 34s 231 odd-fire driven it.
     
    pitmonkey, Jul 28, 2012
    #6
  7. Jul 28, 2012
    pitmonkey

    pitmonkey Member

    Oklahoma
    Joined:
    Feb 27, 2008
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    74
    The 5:38s only have to buy one set of gears already have set for rear centered 44.
     
    pitmonkey, Jul 28, 2012
    #7
  8. Jul 28, 2012
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
    Messages:
    5,470
    Warloch, Jul 28, 2012
    #8
  9. Jul 28, 2012
    pitmonkey

    pitmonkey Member

    Oklahoma
    Joined:
    Feb 27, 2008
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    74
    Cool I'll check that out. Must go get some stats first.
     
    pitmonkey, Jul 28, 2012
    #9
  10. Jul 28, 2012
    pitmonkey

    pitmonkey Member

    Oklahoma
    Joined:
    Feb 27, 2008
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    74
    Cool calculator
    With three gear sets
    5.38 @4000 rpm 55mph
    4.88 @3000 rpm 60mph
    4.56 @3000 rpm 65mph
    Also went to 33" tires all have good crawl ratio.
     
    Last edited: Jul 28, 2012
    pitmonkey, Jul 28, 2012
    #10
  11. Jul 28, 2012
    chuck123wapati

    chuck123wapati Member

    wyoming
    Joined:
    Jun 18, 2008
    Messages:
    761
    sweet calculator
     
    chuck123wapati, Jul 28, 2012
    #11
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