87Warrior Posted January 9, 2012 Share Posted January 9, 2012 My new 4cylinder truck has blessed me with an NP207 transfer case. Having never delt with this t-case I had to do some research. It seems most folks don't hold the 207 in high regard. Poor oiling, noisy and a higher low range seem to be the biggest qualms for this t-case. I have also come across several 207's mentioned having a cracked case. What are the type of failures common to this transfer case? In what conditions are they occurring? I currently have the AX5 and 207 sitting on the shop floor to install a new clutch. Now my question is, would a 231 or 242 really be an upgrade? This truck will primarily be a daily driver with occasional wheeling, think Ouray, Colorado terrain. It will probably never see a tire bigger than a 30". The closest 231 with a 21spline input shaft I have been able to located is 3 hours away. Thoughts, opinions? Link to comment Share on other sites More sharing options...
Geonovast Posted January 9, 2012 Share Posted January 9, 2012 The low range isn't that much higher, I believe it's 2.62 or 2.61 vs the 231's 2.72. I ran a 207 for about a year, and it was really noisy, it also wasn't too fond of going back into 2wd. Link to comment Share on other sites More sharing options...
87Warrior Posted January 10, 2012 Author Share Posted January 10, 2012 Thanks for the input Correy. I will probably just stick with the ol' 207. I've got a hard time believing the 2.5 could do too much damage to it. Any of the t-cases readily that came with the MJ will feel like they have a 'high' low range to me after running my Rubi's 4:1 for 8 years :ack: Link to comment Share on other sites More sharing options...
Pete M Posted January 10, 2012 Share Posted January 10, 2012 the 207 is in the same basket of parts as the peugeot and dana 35. it should be fine, but have a backup plan anyways. :thumbsup: Link to comment Share on other sites More sharing options...
Geonovast Posted January 10, 2012 Share Posted January 10, 2012 Also, the 207 and 231 are not quite the same length. When I went 4wd in my 2.5, I had the 2wd cut down for the AX-(was 4 but became 5) and 207 combo, ended up about 3/4"ish shorter than it should have been, and it would up being the perfect length when I swapped in the 231. Link to comment Share on other sites More sharing options...
mjeff87 Posted January 10, 2012 Share Posted January 10, 2012 some 207's came with a flanged front output for use with the "stick-in-the-can" front driveshaft. You can swap a standard yoke and run the stronger DC driveshaft. Jeff Link to comment Share on other sites More sharing options...
87Warrior Posted January 10, 2012 Author Share Posted January 10, 2012 some 207's came with a flanged front output for use with the "stick-in-the-can" front driveshaft. You can swap a standard yoke and run the stronger DC driveshaft. This was going to be my next question. The 207 I have does have the standard yoke on the front. Do the NP231 and 207 share the same size u-joints? I would like to use the front driveshaft from the 99 parts XJ in this truck. Might need it cut down, but that would be no problem since I will be getting a new rear shaft anyway. Link to comment Share on other sites More sharing options...
mjeff87 Posted January 10, 2012 Share Posted January 10, 2012 yep, same u-joints (1310's) Link to comment Share on other sites More sharing options...
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