This swap has long been pondered over, and as advanced adapters has called it "Impossible" to me, followed by(we must build you a custom atlas for 2700... :thumbdown . I'm here to prove them wrong.
First, Lets talk about why this hasn't been done or why AA calls it impossible.
The 241or is highly saughtafter with the 4:1 low ratio. It is also a redheaded step child of the same family. Now note this too... MOST of the jk241or cases use a Short 23 spline input shaft. While this is correct spline for a 545rfe in our wj's, It is too short to fully engage the splines at the transmission and into the seal. You CANNOT swap input shafts from any case that has a 2.72 ratio. This is where most people call it quits.
So talking with another member who swapped a 271 in noted that when he did his, he used a tail housing out of a 99+ dodge 2500. They are also a 545rfe but the tail housing is about 1.5" shorter...
Ladies and Gentlemen... We have found our holy grail. :cheers:
The dodge tail housing allows the new case to slide closer to the trans, allowing full engagement of the splines and seal.
Now here is a quick note for those on the hunt for a 241or(specifically dealing with ones out of JKs).
There is 2 input shafts that are found in the 241or cases. Prior to 2012, all the cases are the correct to use 23 spline short shaft. In 2012, Jeep retired the 45ref for the W5A580 which uses a 26 spline male shaft(which just so happens to be the one I bought. . .) So the FYI here,The correct input shaft is next to impossible to find. I have called 6 different dealers and all come up with nothing. We currently believe that 12+ MANUALS would still use the old 23 spline, But we have not confirmed this as of yet.
That's it! I am still working on the rest of the details but this should be the ultimate solution to make this combination work! Stay tuned to this thread as I will update it with how my swap goes.
:cheers2::2thumbsup::highfive::thumbsup:
Update so you guys don't have to read too much unless you want(which is a good thing to do anyways)
V8 545RFE new tail housing: 52119433AB
This will allow you to run a 1 3/8" 23 spline input shaft from more common tcases including the 241or
You will need to modify your cross member and either get the corresponding mount from the dodge housing or modify your old one.
As far as which 241or to get...
Just stay away from 12+ JK Auto cases. They are the wrong input and I have yet to find even a part number to change it. You cannot swap your input from any 2.72 ratio case(241,231,242,247,.....)
The difference between JK and TJ cases is that TJs use a speed sensor on the tail output. This maybe useful if you are doing an axle swap and not adding tone rings to the axles. TJ cases can some times cost a premium due to their limited availability.
First, Lets talk about why this hasn't been done or why AA calls it impossible.
The 241or is highly saughtafter with the 4:1 low ratio. It is also a redheaded step child of the same family. Now note this too... MOST of the jk241or cases use a Short 23 spline input shaft. While this is correct spline for a 545rfe in our wj's, It is too short to fully engage the splines at the transmission and into the seal. You CANNOT swap input shafts from any case that has a 2.72 ratio. This is where most people call it quits.
So talking with another member who swapped a 271 in noted that when he did his, he used a tail housing out of a 99+ dodge 2500. They are also a 545rfe but the tail housing is about 1.5" shorter...
Ladies and Gentlemen... We have found our holy grail. :cheers:
The dodge tail housing allows the new case to slide closer to the trans, allowing full engagement of the splines and seal.
Now here is a quick note for those on the hunt for a 241or(specifically dealing with ones out of JKs).
There is 2 input shafts that are found in the 241or cases. Prior to 2012, all the cases are the correct to use 23 spline short shaft. In 2012, Jeep retired the 45ref for the W5A580 which uses a 26 spline male shaft(which just so happens to be the one I bought. . .) So the FYI here,The correct input shaft is next to impossible to find. I have called 6 different dealers and all come up with nothing. We currently believe that 12+ MANUALS would still use the old 23 spline, But we have not confirmed this as of yet.
That's it! I am still working on the rest of the details but this should be the ultimate solution to make this combination work! Stay tuned to this thread as I will update it with how my swap goes.
:cheers2::2thumbsup::highfive::thumbsup:
Update so you guys don't have to read too much unless you want(which is a good thing to do anyways)
V8 545RFE new tail housing: 52119433AB
This will allow you to run a 1 3/8" 23 spline input shaft from more common tcases including the 241or
You will need to modify your cross member and either get the corresponding mount from the dodge housing or modify your old one.
As far as which 241or to get...
Just stay away from 12+ JK Auto cases. They are the wrong input and I have yet to find even a part number to change it. You cannot swap your input from any 2.72 ratio case(241,231,242,247,.....)
The difference between JK and TJ cases is that TJs use a speed sensor on the tail output. This maybe useful if you are doing an axle swap and not adding tone rings to the axles. TJ cases can some times cost a premium due to their limited availability.