I seem to remember the change in designation happening when ownership changed as well.
Any way to tell if this is a NP241 or NP241OR transfer case?
- Thread starter wmblore
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I seem to remember the change in designation happening when ownership changed as well.
Sorry to bring this one back from the dead but I've heard that some pre-03 export TJs came with NP241 transfer cases that had 2.72 ratios.
Look at the round red and silver tag on the rear upper left of the transfer case.
Mopar has been using the 23 spline output since the 60's so the splines should all be the same. The 6 bolt mount pattern was the same from the late 70s through the 90's but the clocking was different. clocking was dependent on where the factory engineers wanted the front output shaft located. You can take the NP435 for input from a ford and the output from a dodge and put it in a jeep with a CJ bell housing using the stock 10 spline clutch and transfercase. Not an easy swap but probably one of the most stout transmissions you could ever fit into a Jeep. Tim
I would question the 231 clocking somewhat. What I do know is the way they changed where the front shaft sits between the TJ and the XJ is they clocked the holes in the rear of the transmission rather than the front of the T-case. Having had to redrill many AW-4's and loaning the drill jig to others who swapped in manual transmissions from an XJ, I know at least that part is correct.
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Well I never said that the 231 changed the clocking, but there are different positions for the front shafts, fords were different than the wranglers and Cherokee were even different than either oof the rest.
I didn't say you did, I just added what I know to be true relative to the TJ since this is a TJ forum, and relative to the 231 since that is what the TJ uses.
I believe all the JK’s use a 241 case but only the Rubicon’s have the 4:1 low range. And FWIW, the Rubicon 241 case is a 100% bolt-in swap in the non-Rubicon JK’s, a buddy of mine just did one last year.
the transfer cases (jk241 4-1 and jk241 2.72-1) are a bolt on swap (from jk to jk). the gear set is not. the front case half is not the same you cannot swap the 2.72 set into a 4-1 case or vice versa. the planetary housing at the front of the case is larger by a substantial degree on the 4-1 models.
the speedometer issue swapping a 241 4-1 case into a 231 TJ regardless of if it is from a TJ or JK Tcase is easily remedied by a speedohealer or similar device.
JK 241 OR swaps are made more difficult because of the output yokes.
A TJ 241 OR can be a bolt in depending on what output spline count is on your transmission.
also, they can be a bear to fit in 2002 and earlier models because of the shallower tcase skid. the 2003 to 2006 models ( years Rubicon was peoduced) all had the "shovel" to make more room for the 241 OR regardless of whether the jeep came with the 241 or 231.
No idea, I was referring to the entire t-case swap compatibility between the two different cases in the JK’s.
I’m not trying to sound smart , cute , knowledgeable or sarcastic, but any consideration of swapping anything in the op’s TJ ended for me when the original post indicated “07”, regardless of the ratio.
I know some of you guys could get a Blackhawk Helicopter engine in one , but it’s been my observation newer generation JK swaps into TJ’s are rare...I know it’s being done to some extent , but it’s not common .
It’s pretty hard these days to swap the same model parts a year or so apart in modern vehicles .
I know some of you guys could get a Blackhawk Helicopter engine in one , but it’s been my observation newer generation JK swaps into TJ’s are rare...I know it’s being done to some extent , but it’s not common .
It’s pretty hard these days to swap the same model parts a year or so apart in modern vehicles .
Gary33
New Member
does anyone know if the output shaft seal is the same on the 241j and the 241or. I have a 241j in my 2006 rubicon behind the 6 speed xmsn and need to replace the output shaft seal but all the seals I find are for the 241or. The number I have is 5013019aa but do not want to order it if it is not for a 241J
if the actual shafts are the same, good to go and they are not that expensive that you cant just order one and find out...