1. Rubicon 5 speed vs 6 speed

    I am looking to buy a Rubicon. Looking at either a 2004 or 2005. Any thoughts on these years and whether the 5 speed or the 6 speed would be better? Thank you.

  2. #2
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    6,008
    Both are good. 05 I'd say. I have the 05 LJ with 6speed with no real complaints. There are issues with all model years.
    ODPA is a big one.
    DW is another.
    Changing almost all fluids from stock is a third.
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  3. #3

    Re: Rubicon 5 speed vs 6 speed

    Avoid the 6spd if you can. It's a problematic design that allows the transmission to accidentally be placed in reverse while moving forward, ruining the transmission. Sure there are plenty of examples without problem, but given the choice between the 2, the 5spd has a better track record.

  4. #4

    Re: Rubicon 5 speed vs 6 speed

    Thank you for the responses. From the research I have done, I should avoid the newer models after 2006. I hear they changed the motor and generally messed the entire model up. What is your guys opinion?

  5. #5
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    6,008
    I'll have to keep an eye out for that.

    Here is info on both:

    NV3550 - 2000-2004 *
    5 speed manual *
    Used with 6 cyl models *
    10 spline input *
    23 spline output *
    Ratios:
    1st - 4.01
    2nd - 2.33
    3rd - 1.39
    4th - 1.00
    5th - 0.78
    Rev - 3.57


    NSG370 - 2005-2006 *
    6 speed manual *
    Used with both 4 cyl and 6 cyl models * 10 spline input *
    23 spline output *
    Ratios:
    1st - 4.46
    2nd - 2.61
    3rd - 1.72 4th - 1.25
    5th - 1.00
    6th - 0.84
    Rev - 4.0

    ut * 23 spline output * Ratios: 1st - 4.46 2nd - 2.61 3rd - 1.72 4th - 1.25 5th - 1.00 6th - 0.84 Rev - 4.06
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  6. #6
    Join Date
    Dec 1999
    Location
    Virginia Beach VA
    Posts
    8,123

    Re: Rubicon 5 speed vs 6 speed

    Quote Originally Posted by TheTelephoneMan View Post
    Thank you for the responses. From the research I have done, I should avoid the newer models after 2006. I hear they changed the motor and generally messed the entire model up. What is your guys opinion?
    Up through 2006 Wranglers were TJs, and they came with a 4.0l engine (also a 4cyl). In 2007 a new model dubbed the JK came out, and they offered a 3.8. In 2012 they offered a Pentastar 3.6l engine that from what I read is generally considered a better engine.

    The 3.6l has 83 more hp, and 23 more ft lbs of torque.

    I believe the 2007-2011 JK had a 4 speed auto transmission, while the 2012 got a new 5 speed transmission.
    My 2005 Wrangler Build Thread

    He who is without oil shall throw the first rod. -Compressions 8.7:1

  7. #7

    Re: Rubicon 5 speed vs 6 speed

    I love my 04 rubi with one big "however" if I were to do it again, I would get the manual. The auto is a pain. I have to turn off the overdrive all time time and still the powerband seems wrong. Other than that, I'm so glad I found it.

  8. #8
    Join Date
    Aug 2012
    Location
    Milwaukee WI next to the lake
    Posts
    289

    Re: Rubicon 5 speed vs 6 speed

    Quote Originally Posted by Bounty__Hunter View Post
    Avoid the 6spd if you can. It's a problematic design that allows the transmission to accidentally be placed in reverse while moving forward, ruining the transmission. Sure there are plenty of examples without problem, but given the choice between the 2, the 5spd has a better track record.
    Why Do people keep claiming the 6 speed allows you to accidentally go into reverse? IT DOES NOT You have to push past a spring loaded gate to get to the position before you can even pull it into reverse. If you cant handle this, don't drive a stick, its a standard setup on all real truck transmissions. As for as having better records, there is literally no difference in failure rates.

  9. #9
    Join Date
    Aug 2012
    Location
    Milwaukee WI next to the lake
    Posts
    289

    Re: Rubicon 5 speed vs 6 speed

    sounds more like you need to regear it than anything. Factory gears, and larger tires? there is your problem... Check out the chart on this page to see what is going on when you put larger tires on your jeep, and how it affects your gearing
    Differential Gear Ratio Chart - Tire Size to Gear Ratio

  10. #10

    Re: Rubicon 5 speed vs 6 speed

    Why Do people keep claiming the 6 speed allows you to accidentally go into reverse?
    That was my question also, while I've never driven a 6 speed, I've driven manual transmission vehicles for 40+ yrs and while I've accidentally kissed reverse a few times - I've never accidentally put it into reverse while rolling forward! No sane person would ever force the gear shift into a gear once they heard the gears start to grind.

  11. #11
    Join Date
    Aug 2012
    Location
    Milwaukee WI next to the lake
    Posts
    289

    Re: Rubicon 5 speed vs 6 speed

    Ive done things with the six speed that would have torn up the five, like pulling boulders on my nieces horse ranch when building an outdoor arena, ( I have fed two five speeds on a previous TJ to the scrap pile to qualify this) and massive other duties in areas the tractor was too big to get to. So te complaints about it not being as strong are also way out on the fringe, and if you have ever had to change the clutch that it sits behind, you quickly realize how much better built it is due to the amount of steel that is in that "iron maiden" It out weighs the th-400 that was in my 76 Cherokee S

Similar Threads

  1. Rubicon 6 speed transmission fluid?
    By jonsolbe in forum Wrangler and CJ
    Replies: 2
    Last Post: 11-09-2015, 01:01 PM
  2. Rubicon Express vs. Skyjacker Lift
    By socal_rob in forum Wrangler and CJ
    Replies: 3
    Last Post: 02-02-2006, 03:05 PM
  3. Ford T18 4 speed transmission with granny first gear!!!
    By harletaz in forum Items for Sale, Trade, or Give Away
    Replies: 0
    Last Post: 07-20-2003, 08:00 PM
  4. 90 Cherokee High Idle Speed
    By TerryMason in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 5
    Last Post: 07-20-2003, 08:00 PM
  5. :-? Transmission Problems 91 YJ 5 speed 4.0L
    By YJeep in forum Wrangler and CJ
    Replies: 2
    Last Post: 07-20-2003, 08:00 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Log in

Log in