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ba10/5 to ax15 OR aw4 swap info


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#1 JeepcoMJ

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Posted 04 October 2008 - 01:21 AM

posted by me on Jeeps-Offroad.com

ba10/5 to ax15 swap
you will need;

basically you need the everything for the tranny (including a new transfercase as it is a different spline count), including the shifter handle, trans, bellhousing, and slave cylinder (plus throwout bearing plate if you manage to get one with an external slave bellhousing...which I highly recommend).

the pilot bearing will also have to be changed to the ax15 pilot bearing
(mod edit: or the 74 CJ 304 pilot bushing (a $2 part) depending on the year of the AX-15).

chances are you will have to put a posi-lok for your front axle Central Axle Disconnect (CAD), though you may get lucky with a 1990 ax15 and np231 which has the vacuum switch on the transfercase.
(mod edit: or secure the CAD in to the shifted position using any one of a number of methods OR swap in a solid shaft from a non-CAD Dana 30)
you can also swap out the input shaft on your t-case for a 23 spline one if you choose (this is a good chance to rebuild the case...it is very easy to do).


[ba10/5 to aw4 swap
you will need;

trans (1987-mid 1990 for or you will need transfercase as well due to spline count changes)
bellhousing
torque converter
fled plate
dust shields

transmission wiring harness (this is seperate from the body harness and the connectors are already there)
engine computer (though this is debatable...some have not had to swap the ECM)
Throttle/trans cable (TV cable) and throttle body mount. the cable is part of the trans, so the only thing you'd need to locate is the mount if you do get the transmission.
TPS the throttle position sensors are also different
TCU (tranny control unit...transmission computer. located under the knee board on the passenger side of the dash. tranny wiring also runs in that location, and you can trail it back to remove it).
pedal assembly with brake switchshifter
shifter plate (plugs the 5 speed shifter hole)
shifter cable and transmission bracket. these are different depending on if the donor has a floor shifter or column shifter.
steering column. you can get by without it, but there is a safety ignition lockout that will keep you from being able to remove the key until it is in park. I run auto columns in my jeeps and bypass the safety feature for the simple fact that the shifter is always put where it belongs, and I don't want any extra crap to break.

that should be it.

also note that the driveshaft length may change, though I have no specifics on this...any swap done by me included a lift, and was a 2wd to 4wd conversion as well so it required new shafts

(I put this here so that anyone doing either swap can find out the parts list. please inform me if I forgot anything...I don't think I did but you never know)
3800: Series II
1986 MJ - 3800 camaro powered, 5 speed 4wd

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#2 carnuck

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Posted 20 November 2008 - 01:47 PM

If you aren't a regular mechanic, I heartily suggest taking zip lock bags with you to the junkyard you get the trans from. Put the bolts from different spots and label the bags with a felt pen. IE: bellhousing, starter, flexplate, trans crossbar, etc.

http://comancheclub....0-near-seattle/

'87 Comanche converted to 4x4 4.0L AW4 NP242, lifted 5 1/2", 33/9.50/15 tires, upgraded brake booster, 90 wiring harness and open cooling system. Tilt, column shift, bench seat, extended front bumper with front tow hooks (room for hidden hitch), canopy, recent new rear bumper 3500lb pull $3500 Good reliable daily driver

 

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#3 tallon2064

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Posted 22 November 2008 - 09:59 AM

Even if you are a mech. kepping track of materials in this way is a good idea I think. Especially with all the little nuts and bolts you can come across and really may need later.

Better to have and not need than need and not have. :dunno:
88 Pioneer 4.0, BA 10, 2 WD (Blown motor)
86 2.8 L, AX-5?, NP 207 transfer, 4 WD (donor for parts)R.I.P.

#4 702_MJ

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Posted 23 January 2009 - 01:38 AM

Nice simple write up, now what would you need to go the opposite way. I want my aw4 to be a nv3550.

[topic='http://comancheclub....mj/#entry399257']Hawaiian Style MJ[/topic]


#5 smithe1811

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Posted 09 April 2009 - 10:07 PM

My donor MJ is and aw4 on the column,and i want it to be on the floor. can i just get the parts for the shifter on the floor and set it up that way? i hate column shifters.
Old breed?New breed?There’s not a damn bit of difference so long as its the Marine breed.—LtGen Lewis B.“Chesty”Puller

88 Pioneer,NP231,4.0,BA-10,SWB,Factory rollbar,Factory skids,4 inch lift,30x9.5x15 BFG Mud Terrains,Ford 302 injectors,1 inch TB spacer,Rustys intake tube,Sunroof,Bucket seats(Mjolnir)
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#6 Pete M

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Posted 09 April 2009 - 10:26 PM

Yes. But save the parts you're removing. Some guys prefer the column shifter. Especially if you've got full guages.

Jeep on!
--Pete

1988 MJ with a 4.0, TJ ax-15/231, 78 Bronco dana 44/9", bumpers, rollbar, blah, blah blah...
A quick synopsis of my current and past MJs: http://www.cardomain.com/ride/330716

Pull up your carpet and check for rust before it's too late!!

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#7 JeepcoMJ

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Posted 10 April 2009 - 09:58 PM

My donor MJ is and aw4 on the column,and i want it to be on the floor. can i just get the parts for the shifter on the floor and set it up that way? i hate column shifters.



you'll need:

aw4 floor shifter and transmission tunnel plate (the plate which mounts under the shifter)
aw4 floor shifter cable
aw4 floor shift transmission cable bracket
aw4 floor shift transmission arm (this is what the cable connects to on the tranny)
aw4 non-column shift steering column (you cannot remove the old one from the old column)
aw4 floor shift safety cable (this goes from the floor shifter to the steering column)


everything there is different from a column-shift setup. the swap will only take a couple hours...I just did it on my 87, but it was more difficult because everything was also upgraded to 1995 cherokee engine trans and wiring.
3800: Series II
1986 MJ - 3800 camaro powered, 5 speed 4wd

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#8 smithe1811

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Posted 11 April 2009 - 10:48 PM

My donor MJ is and aw4 on the column,and i want it to be on the floor. can i just get the parts for the shifter on the floor and set it up that way? i hate column shifters.



you'll need:

aw4 floor shifter and transmission tunnel plate (the plate which mounts under the shifter)
aw4 floor shifter cable
aw4 floor shift transmission cable bracket
aw4 floor shift transmission arm (this is what the cable connects to on the tranny)
aw4 non-column shift steering column (you cannot remove the old one from the old column)
aw4 floor shift safety cable (this goes from the floor shifter to the steering column)


everything there is different from a column-shift setup. the swap will only take a couple hours...I just did it on my 87, but it was more difficult because everything was also upgraded to 1995 cherokee engine trans and wiring.


So whats the differance between the steering column i have now with the ba-10 and the steering column for the aw4 on the floor? i didnt think i would have to chage that part. aside from the key retainer.
Old breed?New breed?There’s not a damn bit of difference so long as its the Marine breed.—LtGen Lewis B.“Chesty”Puller

88 Pioneer,NP231,4.0,BA-10,SWB,Factory rollbar,Factory skids,4 inch lift,30x9.5x15 BFG Mud Terrains,Ford 302 injectors,1 inch TB spacer,Rustys intake tube,Sunroof,Bucket seats(Mjolnir)
Project Mjolnir

#9 JeepcoMJ

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Posted 11 April 2009 - 11:01 PM

My donor MJ is and aw4 on the column,and i want it to be on the floor. can i just get the parts for the shifter on the floor and set it up that way? i hate column shifters.



you'll need:

aw4 floor shifter and transmission tunnel plate (the plate which mounts under the shifter)
aw4 floor shifter cable
aw4 floor shift transmission cable bracket
aw4 floor shift transmission arm (this is what the cable connects to on the tranny)
aw4 non-column shift steering column (you cannot remove the old one from the old column)
aw4 floor shift safety cable (this goes from the floor shifter to the steering column)


everything there is different from a column-shift setup. the swap will only take a couple hours...I just did it on my 87, but it was more difficult because everything was also upgraded to 1995 cherokee engine trans and wiring.


So whats the differance between the steering column i have now with the ba-10 and the steering column for the aw4 on the floor? i didnt think i would have to chage that part. aside from the key retainer.


it has some safety locks in it for the safety cable to attach to. it's not 100% necessary, if you're willing to live with being able to shift without the key turned to the on position. if you don't use the safety lock, you'll have to figure out how to "disarm" the other end of the safety cable by removing it and bypassing that part on the floor shifter (it's not as hard as it sounds)

swapping the key retainer is a PITA if you're not swapping the column then don't bother with that.
3800: Series II
1986 MJ - 3800 camaro powered, 5 speed 4wd

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#10 two_much_talk

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Posted 09 July 2009 - 10:04 AM

I'm doing the BA-10 to AX-15 swap to my XJ this weekend. Should be the the same deal though I figure.

My 87 XJ already has a 4.0/BA-10/NP231. It's getting a 97 AX-15/NP231 with SYE. Only thing I've heard is that the 97 speedo gear needs to be swapped in. (it's supposedly slightly longer than the older one)

I'll try to remember to post up how it goes ... :cheers:


anyone have a dirt cheap front driveshaft in or near west Michigan for me ! :yes:
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#11 Geonovast

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Posted 09 July 2009 - 10:39 AM

BA 10/5/NP231 and AX-15/NP231 use the same front driveshaft.

-Correy

99 XJ, 4.0 HO/AW-4/NP 231, D30/8.25 - Parked The MJs formally known as mine.

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Do I have an AX-15 or BA 10/5? What's my factory axle ratio? Common Jargon definitions.


#12 two_much_talk

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Posted 09 July 2009 - 02:08 PM

BA 10/5/NP231 and AX-15/NP231 use the same front driveshaft.


thanks.

I can get another front to use for the rear then. :chillin:

It will be nice to have the front and rear drive shafts being the same .
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#13 Geonovast

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Posted 09 July 2009 - 04:45 PM

IIRC the rear DS is a few inches longer.

-Correy

99 XJ, 4.0 HO/AW-4/NP 231, D30/8.25 - Parked The MJs formally known as mine.

88 MJ, 2.5 TBI/AX-4, D35 - DD                             CC on Facebook!
Think of the children; Lock your CAD today!  Having trouble posting pictures?
Do I have an AX-15 or BA 10/5? What's my factory axle ratio? Common Jargon definitions.


#14 pingpong

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Posted 09 July 2009 - 08:43 PM

I am getting ready to do this swap on my xj


here are some links

http://www.jeeptech....s/ax15swap.html



http://www.jeepforum...ad.php?t=312203


what I have also learned is.. the hose from the clutch master cylinder to slave cylinder is not available from the aftermarket unless you go through advance adapters, and they want 70 bucks for it.
90 MJ Atleast that is what it was.

87 XJ chopped and locked.... and ready for the rocks

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#15 two_much_talk

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Posted 10 July 2009 - 03:33 PM

the pilot bearing will also have to be changed to the ax15 pilot bearing

(mod edit: or the 74 CJ 304 pilot bushing (a $2 part) depending on the year of the AX-15).



please explain?

is the AX-15 pilot bearing that expensive?
Epic Failure : When everyday run of the mill failure just isn't enough !

#16 Geonovast

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Posted 10 July 2009 - 04:34 PM

No, but the pilot bearing size for the AX-15 was changed IIRC in 91. The hole in the crankshaft was also changed in 91 with the HO motor. Therefore, in order to mate a post-91 AX-15 to a pre-91 4.0, you need the CJ bearing, as it has the proper outer and inner diameters.

-Correy

99 XJ, 4.0 HO/AW-4/NP 231, D30/8.25 - Parked The MJs formally known as mine.

88 MJ, 2.5 TBI/AX-4, D35 - DD                             CC on Facebook!
Think of the children; Lock your CAD today!  Having trouble posting pictures?
Do I have an AX-15 or BA 10/5? What's my factory axle ratio? Common Jargon definitions.


#17 two_much_talk

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Posted 10 July 2009 - 07:40 PM

thanks ... 74 CJ w/304 pilot bearing it is :D
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#18 88Comanche818

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Posted 22 June 2010 - 05:23 PM

[ba10/5 to aw4 swap
you will need;

trans (1987-mid 1990 for or you will need transfercase as well due to spline count changes)
bellhousing
torque converter
fled plate
dust shields
[b]transmission wiring harness (this is seperate from the body harness and the connectors are already there)[/b]
engine computer (though this is debatable...some have not had to swap the ECM)
Throttle/trans cable (TV cable) and throttle body mount. the cable is part of the trans, so the only thing you'd need to locate is the mount if you do get the transmission.
TPS the throttle position sensors are also different
TCU (tranny control unit...transmission computer. located under the knee board on the passenger side of the dash. tranny wiring also runs in that location, and you can trail it back to remove it).
pedal assembly with brake switchshifter
shifter plate (plugs the 5 speed shifter hole)
shifter cable and transmission bracket. these are different depending on if the donor has a floor shifter or column shifter.
steering column. you can get by without it, but there is a safety ignition lockout that will keep you from being able to remove the key until it is in park. I run auto columns in my jeeps and bypass the safety feature for the simple fact that the shifter is always put where it belongs, and I don't want any extra crap to break.


In my Mj it does not appear to be a seperate harness... I don't see the connectors to plug in the AW4 plugs. It appears to all be part of the body harness on the 88 XJ I'm using as a donor. Any help? Do i really need to swap the whole Harness? :doh:

#19 JeepcoMJ

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Posted 22 June 2010 - 06:58 PM

[ba10/5 to aw4 swap
you will need;

trans (1987-mid 1990 for or you will need transfercase as well due to spline count changes)
bellhousing
torque converter
fled plate
dust shields
[b]transmission wiring harness (this is seperate from the body harness and the connectors are already there)[/b]
engine computer (though this is debatable...some have not had to swap the ECM)
Throttle/trans cable (TV cable) and throttle body mount. the cable is part of the trans, so the only thing you'd need to locate is the mount if you do get the transmission.
TPS the throttle position sensors are also different
TCU (tranny control unit...transmission computer. located under the knee board on the passenger side of the dash. tranny wiring also runs in that location, and you can trail it back to remove it).
pedal assembly with brake switchshifter
shifter plate (plugs the 5 speed shifter hole)
shifter cable and transmission bracket. these are different depending on if the donor has a floor shifter or column shifter.
steering column. you can get by without it, but there is a safety ignition lockout that will keep you from being able to remove the key until it is in park. I run auto columns in my jeeps and bypass the safety feature for the simple fact that the shifter is always put where it belongs, and I don't want any extra crap to break.


In my Mj it does not appear to be a seperate harness... I don't see the connectors to plug in the AW4 plugs. It appears to all be part of the body harness on the 88 XJ I'm using as a donor. Any help? Do i really need to swap the whole Harness? :doh:



I will have to correct myself. The transmission harness is part of the engine bay harness...NOT part of the dash harness. the tranny computer harness is also part of the engine bay harness. it enters the firewall on the passenger side behind and to the pass. side to the rear of the engine. the TCU is located under the knee board.


to do an aw4 TO 5 speed swap, you do not need to replace the harness...you can splice the trans harness connectors together, and swap the ECU and remove the TCU.

however, you cannot do a 5 speed TO auto swap without swapping the entire engine harness, or doing some heavy duty wiring to install wires that simply don't exist in the 5 speed harness.
3800: Series II
1986 MJ - 3800 camaro powered, 5 speed 4wd

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#20 Pete M

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Posted 10 January 2012 - 05:32 PM

bump to bring it back to the first page.

Jeep on!
--Pete

1988 MJ with a 4.0, TJ ax-15/231, 78 Bronco dana 44/9", bumpers, rollbar, blah, blah blah...
A quick synopsis of my current and past MJs: http://www.cardomain.com/ride/330716

Pull up your carpet and check for rust before it's too late!!

Comanche Club can coozies are now available!