[tesseract]

I am starting this thread because as soon as someone talks about a swap on an LX the common answer is: "trade it in" or "get a hemi". I find this advice weird because some people here have paid off their cars and do not want to go further in debt or upside down their loans, some have modded it beyond the point of return and love their cars as they are and want to keep them for a long time. Some will also tell you that this is an expenive endevour (false).

I have succesfully completed mine.
If you are stuck with a 42rle transmission and you long for that solid NAG1 because there is no way you are selling a car or are planning a sweet v8 upgrade because your cheap v6 has been paid for here is what you will need. I suggest browsing junk yards for various parts at www.car-part.com

IF PURCHASING FROM JUNK YARDS ALWAYS ask them to cut with a wire harness!!!! Example: if you need the TCM tell them to leave wire with it.

REQUIREMENTS!!! READ THIS BEFORE DOING ANYTHING
Before doing this you must have an LX equipped with ABS, if you do not have ABS, limp mode forever. In that case you need the ABS assembly, the abs pump abs module and some wiring to wrie it in and get it authorized in your FCM (this could prove to be a challenge and will require patience to complete but the price of the parts is relatively cheap at junkyards I saw the whole assembly for like 100$, Jon (Nyinstaller) will be able to probably authorize it in the FCM)

If you are the type to read a wiring diagram (you better if you are doing this yourself) you will notice that all 4 speeds are missing a power source for the tcm whereas 5 speeds have a fuse in the rear for the TCM, the solution I came up with is to make a relay with a 10 amp fuse (unsure of the amperage I used, damn you memory) and wire it to the ignition so it has constant power and does not lose power during crank. You can make a zener diode and run it from the back to the front if you are a perfectionist but this method will work just fine.

Electronics, I will start by this because these are the most complex parts of this whole swap:
You will absolutely need a PREDATOR/INTUNE/TRINITY this is because a 4 speed has a 3.64 gear ratio and a 5 speed has a 2.82 gear ratio. These little beauties have the ability to match up your gear ratios, if you do not match these up you will be in limp mode forever.

You will need the TCM (average junkyard price 70$) part # 04692392AB, you do not need to do any reprogramming on this because the predator will rewrite the gear ratio to 3.64. ALSO ASK THEM TO LEAVE THE WIRE HARNESS IN AND CUT THE WIRE, you will have to wire up this part to the transmission.

You will also need the POWER TRAIN CONTROL MODULE (70$ from junk yard) part #04606838AB, (junkyards will call this the ENGINE CONTROL UNIT, or ECU, or ECM) but as long as it belonged to a v6 with a 5 speed automatic you should be fine because this needs reprogramming as the PCM has to match up and see your VIN for the car to start. If you do not reprogram, your car will start and shut off after 30 seconds. Jon at AMP (After Hours Mopar Performance) reprograms these beauties for about 150$ a pop you just send him your 4 speed PCM and he rewrites the software and proper VIN in it. I was lucky enough to know a chrysler tech that brought the starscan over and did it at my place but expect the dealer to charge you through the butt (more than jon from AMP).

You need to send your ORIGINAL FRONT CONTROL MODULE (the computer that is plugged into the front fusebox) to Jon if you want the shifter module authorized and that autostick is reflected in your cluster (without this, the car will shift through the gears but you will not have the ability to use autostick and if you try to use it without proper authorizations your transmission will act funky, so beware! (this is approx 150- 175 to do)

Mechanical parts:
THE TRANSMISSION NAG1 (DUH) must be from a V6, bellhousings are not the same from V8 to V6 (approx 400$ for a low mileage one) you must ask them to leave atleast 12 inches of wire, this wire will connect to the TCM. Please note that you will need to connect this part to the TCM. Also ask them to leave the shiftcable on as well as the flywheel, and also the OIL FILLER TUBE if you are dumb like me you will be chasing down hard to find parts later down the road and waiting to finish your stuff.

IF YOU FORGOT TO ASK FOR THE ATTACHED FLYWHEEL SHIFT CABLE AND OIL FILLER TUBE or for some reason the junkyard only had the transmission you will have to chase down these crucial parts.
Your local stealership has you covered or moparoverstock.com also

Oil filler tube(9$), you will need parts the oil filler tube PART # 04591880AE ; 04591880AB; 04591880AC; 04591880AD (these will vary across the world and where you purchase them) but here is the link for the correct part
http://www.moparpartsoverstock.com/...ansmission-Oil-Filler/6945555/04591880AE.html

AND

A mounting grommet for the oil filler tube(3$)
04810021AB ; 04591879AC; 04800252AA; 04810021; 05189087AA; 68810021 (possible part #)
http://www.moparpartsoverstock.com/...e--Oil-Filler-Tube-To/6658714/04810021AB.html

FLYWHEEL/FLEXPLATE(40$)
04752600AA
http://www.moparpartsoverstock.com/...orque-Converter-Drive/6643067/04752600AA.html

CABLE GEAR SELECTOR (SHIFT CABLE) 79$ (ask for this in the junkyard they will usually want like 10$ for it)
04578073AD ; 04578073AB; 04578073AC
http://www.moparpartsoverstock.com/p/__/CABLE-Gear-Selector/6640272/04578073AD.html

SHIFT CABLE MOUNTING BRACKET (1$)
04578071AA
http://www.moparpartsoverstock.com/p/__/BRACKET-Cable-Mounting/6662179/04578071AA.html

AUTO STICK FLOOR SHIFTER ASSEMBLY buy at junk yard (approx 50$)

DRIVESHAFT FROM 5 SPEED (100$$) buy at junkyard

TRANSMISSION MOUNT 30$ at junkyard (make sure it is from a 5 speed) (I had to drill through my frame to get this to fit on my car as it would absolutely not fit in any way I tried but on some LX cars it will fit no problem)

TRANSMISSION COOLER LINES (approx 200$ at stealership) This to me is optional, the 4 speed cooler lines do not align, but I just bent them and used tightly clamped rubber hoses to reach the tranny, and I coupled that with a transmission cooler from B&M, it should hold up just fine, it is not a high pressure point. Just keep an eye on it!

7 liters of ATF +4 TRANNY FLUID (prices will vary use dipstick to gage how much fluid you'll need, remember your torque converter will be empty too, so you may need the whole 7 liters)

I recommend buying a transmission dipstick, changing the pan gasket and tranny filter, and also every single o-ring! Not necessary but as long as you are under the car, might as well do it... o-rings have been known to leak or let water in and this tranny does not play well with water mixed with transmission fluid....

as for the cost assuming you already have a predator.
expect to pay from 700 to 1000$ in parts (with shipping)
finding a fair mechanic to do the wiring and install 500$ approx
Reprogramming of the pcm and fcm approx 300- 340 by jon.

my total cost was 1100$ with labor and programming.

You have your parts. Now you have to find someone to empty out your transmission, do your wiring and install the new transmission and reprogram the PCM/FCM and you are out the door!

This transmission is compatible with many mods
the Tranzformer
Paddle shifters
Blue top solenoids
etcetc

It is a lot more solid and does not tend to overheat as much as the 42rle which is practical for supercharger applications or straight up V8 swaps the bellhousing can come undone and you can use the V8 bellhousing.

Credits:
Much of the merit goes to Jon at AMP for helping me and also MADDOG from 300cforums!!
Thanks guys you sure made this experience easier and I hope this thread will make it easier on some other modders!

Enjoy!
(this may seem like a lot of trouble but it is not that bad especially if the car is all yours and you plan on keeping it and modding out in a beast of a ride)

 

[decepticon]

Nice!

 

[blues143]

Good to see you did not give up and now your rockin a Nag1. Congrats!!

 

[Socal818]

For the mechanical stuff you have listed is that stuff you need to buy additionally or if they don't supply you with the nag1? Also what's a good low mileage I should look for on a nag1? I wanna do the switch but not sure what I'm looking for. Thanks!

 

[tesseract]

mine had 22k, and it is if they do not supply it, if you ask them to supply it they probably will at an extra cost but it will be cheaper than buying everything separately and tracking parts down!!

 

[Nyinstaller]

thanks for the shout out. How did you program the fcm to account for the new shifter and ability for manual mode? etc

 

[tesseract]

I didn't yet! Since the car went into storage and I have been super busy gathering parts for a V8 swap! However it all works now except I cannot use autostick and the manual mode itself. I figured since I am doing the V8 swap now, I do not see the need to actually get my v6 FCM reprogrammed just to replace it with a V8 fcm down the road. Tell me Jon, will I need to get the V8 FCM reprogrammed too if I am using the FCM, PCM and TCM from the same V8 car?

Also here is a pic of me trying to get the engine in the car with a forklift while my friend is shouting at me that I will knock it over and that it will never work!

ps: it worked

 

[mabroyles62]

Very nice. I am in the process of the v8 swap and will be sending my pcm to jon shortly for reprogramming.

 

[tesseract]

if you have the PCM, FCM and TCM and wire harness from same donor car logically there should be no programming done because you are swapping out the engine and you will be running off the VIN of the donor vehicle, the only thing that needs to be reprogrammed are the keys, if you have a key guy you should be golden!

 

[mabroyles62]

Keeping my fcm and tcm.

 

[tesseract]

Double post

 

[mabroyles62]

Im looking for this wiring harness still. Pretty much my last key to the puzzle

 

[tesseract]

Wow you went the complicated way. I just bought the whole thing with all the wires and the computers.

 

[MrRicoJam5]

42RLE swap

I am starting this thread because as soon as someone talks about a swap on an LX the common answer is: "trade it in" or "get a hemi". I find this advice weird because some people here have paid off their cars and do not want to go further in debt or upside down their loans, some have modded it beyond the point of return and love their cars as they are and want to keep them for a long time. Some will also tell you that this is an expenive endevour (false).

I have succesfully completed mine.
If you are stuck with a 42rle transmission and you long for that solid NAG1 because there is no way you are selling a car or are planning a sweet v8 upgrade because your cheap v6 has been paid for here is what you will need. I suggest browsing junk yards for various parts at www.car-part.com

IF PURCHASING FROM JUNK YARDS ALWAYS ask them to cut with a wire harness!!!! Example: if you need the TCM tell them to leave wire with it.

REQUIREMENTS!!! READ THIS BEFORE DOING ANYTHING
Before doing this you must have an LX equipped with ABS, if you do not have ABS, limp mode forever. In that case you need the ABS assembly, the abs pump abs module and some wiring to wrie it in and get it authorized in your FCM (this could prove to be a challenge and will require patience to complete but the price of the parts is relatively cheap at junkyards I saw the whole assembly for like 100$, Jon (Nyinstaller) will be able to probably authorize it in the FCM)

If you are the type to read a wiring diagram (you better if you are doing this yourself) you will notice that all 4 speeds are missing a power source for the tcm whereas 5 speeds have a fuse in the rear for the TCM, the solution I came up with is to make a relay with a 10 amp fuse (unsure of the amperage I used, damn you memory) and wire it to the ignition so it has constant power and does not lose power during crank. You can make a zener diode and run it from the back to the front if you are a perfectionist but this method will work just fine.

Electronics, I will start by this because these are the most complex parts of this whole swap:
You will absolutely need a PREDATOR/INTUNE/TRINITY this is because a 4 speed has a 3.64 gear ratio and a 5 speed has a 2.82 gear ratio. These little beauties have the ability to match up your gear ratios, if you do not match these up you will be in limp mode forever.

You will need the TCM (average junkyard price 70$) part # 04692392AB, you do not need to do any reprogramming on this because the predator will rewrite the gear ratio to 3.64. ALSO ASK THEM TO LEAVE THE WIRE HARNESS IN AND CUT THE WIRE, you will have to wire up this part to the transmission.

You will also need the POWER TRAIN CONTROL MODULE (70$ from junk yard) part #04606838AB, (junkyards will call this the ENGINE CONTROL UNIT, or ECU, or ECM) but as long as it belonged to a v6 with a 5 speed automatic you should be fine because this needs reprogramming as the PCM has to match up and see your VIN for the car to start. If you do not reprogram, your car will start and shut off after 30 seconds. Jon at AMP (After Hours Mopar Performance) reprograms these beauties for about 150$ a pop you just send him your 4 speed PCM and he rewrites the software and proper VIN in it. I was lucky enough to know a chrysler tech that brought the starscan over and did it at my place but expect the dealer to charge you through the butt (more than jon from AMP).

You need to send your ORIGINAL FRONT CONTROL MODULE (the computer that is plugged into the front fusebox) to Jon if you want the shifter module authorized and that autostick is reflected in your cluster (without this, the car will shift through the gears but you will not have the ability to use autostick and if you try to use it without proper authorizations your transmission will act funky, so beware! (this is approx 150- 175 to do)

Mechanical parts:
THE TRANSMISSION NAG1 (DUH) must be from a V6, bellhousings are not the same from V8 to V6 (approx 400$ for a low mileage one) you must ask them to leave atleast 12 inches of wire, this wire will connect to the TCM. Please note that you will need to connect this part to the TCM. Also ask them to leave the shiftcable on as well as the flywheel, and also the OIL FILLER TUBE if you are dumb like me you will be chasing down hard to find parts later down the road and waiting to finish your stuff.

IF YOU FORGOT TO ASK FOR THE ATTACHED FLYWHEEL SHIFT CABLE AND OIL FILLER TUBE or for some reason the junkyard only had the transmission you will have to chase down these crucial parts.
Your local stealership has you covered or moparoverstock.com also

Oil filler tube(9$), you will need parts the oil filler tube PART # 04591880AE ; 04591880AB; 04591880AC; 04591880AD (these will vary across the world and where you purchase them) but here is the link for the correct part
http://www.moparpartsoverstock.com/...ansmission-Oil-Filler/6945555/04591880AE.html

AND

A mounting grommet for the oil filler tube(3$)
04810021AB ; 04591879AC; 04800252AA; 04810021; 05189087AA; 68810021 (possible part #)
http://www.moparpartsoverstock.com/...e--Oil-Filler-Tube-To/6658714/04810021AB.html

FLYWHEEL/FLEXPLATE(40$)
04752600AA
http://www.moparpartsoverstock.com/...orque-Converter-Drive/6643067/04752600AA.html

CABLE GEAR SELECTOR (SHIFT CABLE) 79$ (ask for this in the junkyard they will usually want like 10$ for it)
04578073AD ; 04578073AB; 04578073AC
http://www.moparpartsoverstock.com/p/__/CABLE-Gear-Selector/6640272/04578073AD.html

SHIFT CABLE MOUNTING BRACKET (1$)
04578071AA
http://www.moparpartsoverstock.com/p/__/BRACKET-Cable-Mounting/6662179/04578071AA.html

AUTO STICK FLOOR SHIFTER ASSEMBLY buy at junk yard (approx 50$)

DRIVESHAFT FROM 5 SPEED (100$$) buy at junkyard

TRANSMISSION MOUNT 30$ at junkyard (make sure it is from a 5 speed) (I had to drill through my frame to get this to fit on my car as it would absolutely not fit in any way I tried but on some LX cars it will fit no problem)

TRANSMISSION COOLER LINES (approx 200$ at stealership) This to me is optional, the 4 speed cooler lines do not align, but I just bent them and used tightly clamped rubber hoses to reach the tranny, and I coupled that with a transmission cooler from B&M, it should hold up just fine, it is not a high pressure point. Just keep an eye on it!

7 liters of ATF +4 TRANNY FLUID (prices will vary use dipstick to gage how much fluid you'll need, remember your torque converter will be empty too, so you may need the whole 7 liters)

I recommend buying a transmission dipstick, changing the pan gasket and tranny filter, and also every single o-ring! Not necessary but as long as you are under the car, might as well do it... o-rings have been known to leak or let water in and this tranny does not play well with water mixed with transmission fluid....

as for the cost assuming you already have a predator.
expect to pay from 700 to 1000$ in parts (with shipping)
finding a fair mechanic to do the wiring and install 500$ approx
Reprogramming of the pcm and fcm approx 300- 340 by jon.

my total cost was 1100$ with labor and programming.

You have your parts. Now you have to find someone to empty out your transmission, do your wiring and install the new transmission and reprogram the PCM/FCM and you are out the door!

This transmission is compatible with many mods
the Tranzformer
Paddle shifters
Blue top solenoids
etcetc

It is a lot more solid and does not tend to overheat as much as the 42rle which is practical for supercharger applications or straight up V8 swaps the bellhousing can come undone and you can use the V8 bellhousing.

Credits:
Much of the merit goes to Jon at AMP for helping me and also MADDOG from 300cforums!!
Thanks guys you sure made this experience easier and I hope this thread will make it easier on some other modders!

Enjoy!
(this may seem like a lot of trouble but it is not that bad especially if the car is all yours and you plan on keeping it and modding out in a beast of a ride)

Help Help Help... ive managed to find my self halfway down this road but now im in need of direction advice and support! i have a 2005 300 with 3.5, ABS, and 42RLE, i bought the NAG1 driveshaft and shifter.. everywhere i looks say's there is no difference in flywheel and the is no one local to do any programming at this point i hate to have to spend $400 on a programmer that im only going to use once and im a lil lost on what to do to the TCM when i do find one with that part number... This Newbie maybe way over his head!! :doh::doh:

 

[Jackb20]

Thanks! I just test drove an rt magnum today (I have an sxt) I wasn't as impressed as I had expected. My car goes just as hard. The leather on the rt felt cheap, all around I am going to keep my modded sxt.


Sent from my iPhone using Tapatalk

 

[Bryali]

Help Help Help... ive managed to find my self halfway down this road but now im in need of direction advice and support! i have a 2005 300 with 3.5, ABS, and 42RLE, i bought the NAG1 driveshaft and shifter.. everywhere i looks say's there is no difference in flywheel and the is no one local to do any programming at this point i hate to have to spend $400 on a programmer that im only going to use once and im a lil lost on what to do to the TCM when i do find one with that part number... This Newbie maybe way over his head!! :doh::doh:

Ummmm, is there a question in there somewhere? What exactly do you need?

If you are looking for PCM/TCM flashing, that's not something you'll be able to program with a Diablo tool. You'll need a StarScan or StarMobile, which I'm sure you don't have, so you'll want to contact Jon Rodriguez (NYInstaller). He can do a pretty quick turn-around and should be able to program any features that are available and necessary.

You'll have to pull your PCM and then find a stand-alone TCM and send them to him. If you have a junk yard near you, look for any other 1st gen V6/5spd and pull the TCM and wiring harness to make things easier. Another option is to contact Andy at East Coast Moparts and see about buying a new TCM, although it'll be more expensive than a junk yard find it'll still probably be cheaper than your local dealership, even with shipping.

Either way, Jon will flash them and send them to you. There is also some decent wiring that's necessary, but if you're halfway down this road and didn't mention any of the wiring, then perhaps you've already tackled this part of it.

Good luck!

 

[the_oblivion]

TCMs do not need to be reprogrammed they are not vin dependant and pretty much the only "free" module on the car. However, they do not exist in the 42rle you are in for an awful time of getting it wired up to the transmission, there is a pigtail harness that comes out of the nag1 that needs to be wired to the tcm harness and then you add the tcm to the car by plugging it in the harness. You also need to build an always on relay so that when you turn the key to on position the tcm automatically turns on. This is the most complex part of the swap as you need to be able to read a wiring diagram if you do not want to start over a bunch of times.

Fcm needs to be reprogrammed to accept autostick and that the changes are reflected on the cluster i think Jon charges 175$ To get that done.

Your pcm needs to have proper 5 speed vin added to it (donor car vin)

also the flywheel is extremely different not even remotely the same bolt pattern
as for programming that you need to do yourself is set the proper gears with a tuner.

unless you had a different question... Cause there is no really question in your statement

 

[Apoc]

I know I'm a little late to the show but I have an 08 Magnum SXT rear wheel drive that I want to do this swap for
Can I just pull any nag1 transmission, pcm, wiring harness and transmission control module and other parts listing out of
any 1st Gen LX as long as it has those features year and model do not matter? Example would be a 2006 SXT rear wheel
Magnum or charger. Also on the wiring side of things does anyone have pictures and write up for that or is it as simple
As comparing the wiring diagram for the 4 speed and the 5-speed and just wiring as needed.

 

[Ultimagic5]

if you have the PCM, FCM and TCM and wire harness from same donor car logically there should be no programming done because you are swapping out the engine and you will be running off the VIN of the donor vehicle, the only thing that needs to be reprogrammed are the keys, if you have a key guy you should be golden!

So is this a sure thing if I get all of those plus your list? Strongly considering this after much research. Would there be any conflicts other than needing to resync the keys to the ignition?

 

[sojiaraggs9000]

So is this a sure thing if I get all of those plus your list? Strongly considering this after much research. Would there be any conflicts other than needing to resync the keys to the ignition?

Depends... are you talking about swapping v6 to hemi engines n all or 42RLE to NAG1 swap? If engine swaps yeah as long as its from the same vehicle all the modules will be programed for that vehicle already.

If your talking 42RLE to NAG1 swap then no. No especially if its an 2008 ish 300. The write up on this site are for pre-08 300s. There are a few thing that were slightly different. I found this out when I did my swap. Driveline had a lip that needed trimmed to fit. Transmission mounting bracket was different and had to be modified. 08's don't have FCM (Front Control Module) s they have TIPM (Totally Integrated Protocol Module). TCM (Transmission Control Module) is encrypted into the PCM (Powertrain Control Module). 42RLE PCM has 4 plug connection spots and the 4th one has pins in it. On a NAG1 PCM that 4th spot has no pins. Which means you'll have to replace the 42RLE transmission PCM with a NAG1 transmission PCM as well as add a standalone TCM to bypass the Chrysler encryption for its TCM.