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Discussion Starter #1
Hi, I need to replace my 2007 JK Rubicon 4-door transmission 6-speed. I have done a ton of research but cannot get a straight answer if the 2011 part 52104741AB/RL104741AB will fit in my vehicle. I have had a transmission shop who was trying to sell me one tell me it will but anywhere I look online only shows the part number for a 2011.

Also are there different transmissions for different models of JK ie basic models vs the Rubicons or are they all the same?

Mopar changes part numbers all the time and if the computer doesn't spell it out the parts at Jeep don't have a clue. I have checked all the diagrams on factorychryslerparts.com and it looks like the same front and rear case on mine and the 2011, input and output shaft,etc. Everything looks to be the same it just seems there was a new part number in 2011. I have a line on a 2011 with 20,000 kms for a great deal so If I can get that instead of an older one with 50000+ kms I would much rather do it.

Any insight from someone with knowledge around this would be much appreciated.

Jeff
 

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The Daimler NSG370 6-Speed Manual was initially introduced in 2005 and used on the TJ. It has continued to be used on the JK since 07 to the present. The 2011 manual trans. will fit your 07 JK. It's the same trans. for all models (X, Sport, Sahara, Rubicon, and any and all packages).
 

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Discussion Starter #3
So it looks like there was a 6th gear change in 2011 which carries forward through to 2015.

2015 specs - 2015 Jeep Wrangler Unlimited Specifications Information Brochure - ne…
6th gear is 0.797

2011-2014 - The hot new 2011 and 2012 Jeep Wrangler and Wrangler Unlimited - see the changes with new engine, transmission, interiors, and tops
6th gear is 0.797

2007 specs - Jeep Horizons :: 2007 Jeep Wrangler Unlimited Specifications
6th gear is 0.84

Input shaft and main shaft are the same for all years.

Input shaft - 6th gear and needle bearing have diff part #'s
2011-2015 - 68089071AA - Gear, Sixth
2007-2010 - 05099794AA - Gear, Sixth

Countershaft assembly - has a stop ring syncronizer different in the parts breakdown and possibly the countershaft itself as its not listed separately but the complete assembly has different parts numbers as listed below
2011-2015 - 68089743AA - COUNTERSHAFT Assembly complete
2007-2010 - 05159162AA - COUNTERSHAFT Assemble complete

I've ordered the used 2011 so I'll see if it fits and update the thread.
 

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Discussion Starter #4
Well the 2011 NSG370 fit into my 2007 JK and it drives :) It looks like there are minor differences with the 2011 transmissions and the 2007-2010's

Summary of differences:
-Needed to swap the crank position sensor on the side of the bell housing as the 2011 had a different plug on it compared to my 2007
-2011 has a taller 6th gear (which means lower rpms on the highway) 2007-2010 .84 vs 2011 .797
-The fork pivot ball mount inside the bell housing (on the left when looking in from the front) has been extended on the 2011 compared to my 2007. There was a TSB for the 2006 TJ and 2007 JK ( TSB 06-002-07) which added two washers behind the pivot ball.
-One of my positioning cotter pins on the engine was quite tight to slide the transmission onto, I had to use the bolt for the last 1/8-1/4" to pull it together on the one side. From everything I read they are the same for all years so I figure it was just because I didn't brush out the hole in the transmission where it was going in and there must have been some corrosion since the new/used transmission had been sitting for a long time.

If I think of anything else or if things blow up I'll post here again :)

Cheers,
Jeff
 
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