Jeep Speed Shop now has a DIY JT Hemi swap kit!

[tcabece]

They do but the 100m hurdle race of getting it through a referee is a complex goat rope. If they’ve never seen it before they are more likely to put the big red “X” on your submission. Yes there are guidelines and rules and regs for all of it but if it look like an alien most people are gonna shoot it. I’d really like to do something along the lines of that Mercedes Diesel you mentioned above. Small scale turbo diesel that has enough power to move it but not enough to drink a tank in an hour. Feed it the 8 gears and that would be one heck of a machine.

I have the Wrangler 6.4L in my Mojave. I keep the original 1622 (2H, 4H/4L) transfer case. On the freeway I get 18.5/19 MPG and 16/17 MPG around town. The Wrangler 392 uses the full time 4 wheel drive transfer case. I’ve talked to a number of those owners and they are lucky to get 14/15 MPG on the freeway and less in town.

Sponsored

 

[BourbonRunner]

I have a 4runner with a Mercedes diesel lol, swapping engines isn't a challenge to me.

If I was paying for labor and didn't mind the cost, I'd for sure just drop it off with AMW.

I, don't even care about mounts and adapters, it's really just the CAN wiring and programing I'm after.

One of the most bulletproof trucks ever coupled to the legendary longevity of the OM series diesels? That's the automotive equivalent of dividing by zero.

You, sir, are a madman.

 

[Flyin6]

Agree. But it doesn't seem like they're hurting for business so...

I had this conversation with the owner of Joe's Jeep Jungle around the time JSS originally announced the kits. He brought up a very good point: JSS has been in the game for a very long time and builds a great product but AMW's kit is absolutely, totally complete and better than OEM quality whereas JSS products are more for the project builder or smaller shop.

He's done both and the big difference he found with AMW is there's far less fabrication, unknown variables and faster install time because they thought of everything. According to him with JSS you traditionally would get the major components aside from the drivetrain but there would also be a shopping list for your local dealer and NAPA.

There is actually another alternative on the horizon, a new swap coming from a shop that does all the Stellantis conversion stuff and used to do a ton of AMW swaps. My JT is the first production swap and it is underway. This new swap is even more factory than AMW (And btw, I am not hating on AMW; I think they have a great product).
The shop doing mine is not going to offer the 5.7 swap, but the 6.4 Hemi swap is cheaper than the AMW 5.7.
I am/will post the process on my build thread, and on a devoted 6.4 Hemi swap thread you will see shortly.
I, too, went down the rabbit hole looking at the JSS swap. I determined I was mechanically capable; however, I lacked the fine-tuning skills and would likely move the ball all the way down to the 20-yard line and fail to complete. It is worth the higher cost to me to get it professionally done. We all have to define our particular battlespace considering personal ability, tools, cost, available Tylenol, and so forth. But this newest swap is something that will fall into that sweet spot for many. For me, 40K+ for a Hemi swap made no sense...

 

[Wheelin98TJ]

I have a 4runner with a Mercedes diesel lol, swapping engines isn't a challenge to me.

If I was paying for labor and didn't mind the cost, I'd for sure just drop it off with AMW.

I, don't even care about mounts and adapters, it's really just the CAN wiring and programing I'm after.

For sure on the wiring.

I once made a wiring harness for a swap. Won't do that again.

 

[BourbonRunner]

There is actually another alternative on the horizon, a new swap coming from a shop that does all the Stellantis conversion stuff and used to do a ton of AMW swaps. My JT is the first production swap and it is underway. This new swap is even more factory than AMW (And btw, I am not hating on AMW; I think they have a great product).
The shop doing mine is not going to offer the 5.7 swap, but the 6.4 Hemi swap is cheaper than the AMW 5.7.
I am/will post the process on my build thread, and on a devoted 6.4 Hemi swap thread you will see shortly.
I, too, went down the rabbit hole looking at the JSS swap. I determined I was mechanically capable; however, I lacked the fine-tuning skills and would likely move the ball all the way down to the 20-yard line and fail to complete. It is worth the higher cost to me to get it professionally done. We all have to define our particular battlespace considering personal ability, tools, cost, available Tylenol, and so forth. But this newest swap is something that will fall into that sweet spot for many. For me, 40K+ for a Hemi swap made no sense...

That's good news indeed. I'll be interested to see what the final pricing arrives at considering it's every bit of $40K to do an AMW 392.

When I spoke with Joe about an eventual swap in my JTM, I was more interested in the 5.7L but the cost between that and the 6.4L is low enough that most people opt for the 392.

 

[Jrgunn5150]

For sure on the wiring.

I once made a wiring harness for a swap. Won't do that again.

Anything pre CAN is easy.

Anything post 2010 or so is way too involved with modules and programming for me to want to take it on as a DIY, it's more than just wiring, it's protocols and interfaces and and and.

I'd rather just buy a solution in that case.

Gen III Hemi's and LS engines that need like four wires hooked to the factory fuse box to run are nice, but only going into something primative like my 4runner.

 

[Wheelin98TJ]

Anything pre CAN is easy.

Anything post 2010 or so is way too involved with modules and programming for me to want to take it on as a DIY, it's more than just wiring, it's protocols and interfaces and and and.

I'd rather just buy a solution in that case.

Gen III Hemi's and LS engines that need like four wires hooked to the factory fuse box to run are nice, but only going into something primative like my 4runner.

I almost said mine was a CCD to PCI swap, but I didn’t want to make myself sound more incompetent.

I didn’t have experience with the wiring diagrams in the FSMs. Figured it out by the time I was done, but I struggled along the way.

 

[Flyin6]

That's good news indeed. I'll be interested to see what the final pricing arrives at considering it's every bit of $40K to do an AMW 392.

When I spoke with Joe about an eventual swap in my JTM, I was more interested in the 5.7L but the cost between that and the 6.4L is low enough that most people opt for the 392.

I was told the 5.7 engines were increasing in price to a greater extent than the 6.4. Aside from cost, to call these motors nearly identical is just wrong. The 6.4 is a much, much better engine. I posted all the differences I found in my research in my first 6.4 Hemi swap thread; check it out.
I have spoken with Mike, the owner, about pricing. He does not want me to disclose the numbers until they are finished with my swap, so that they can really nail the cost down. It was so far below the AMW price, I thought it was a joke!

 

[BourbonRunner]

I was told the 5.7 engines were increasing in price to a greater extent than the 6.4. Aside from cost, to call these motors nearly identical is just wrong. The 6.4 is a much, much better engine. I posted all the differences I found in my research in my first 6.4 Hemi swap thread; check it out.
I have spoken with Mike, the owner, about pricing. He does not want me to disclose the numbers until they are finished with my swap, so that they can really nail the cost down. It was so far below the AMW price, I thought it was a joke!

You must have misunderstood me- I'd be content with a 5.7L but the delta between that and the 6.4L is small in the grand scheme. Not having to use premium is nice, though.

I'm really looking forward to your finished product. I did read your thread about the swap a while back and it was incredibly thorough. Good on you for breaking it all down the way you did.

But that said, if Jeep offered a 5.7L from the factory, I'd strip all the stuff off mine and get it ready for trade and not think about a 392 swap again

Sponsored