Rcoe
Well-Known Member
If only someone would offer a kit that would give you all the parts for the standard install.
Sponsored
Sponsored
392 V8 Engine Swap is In and Running!! (2023 Gladiator Mojave)
- Thread starter tcabece
- Start date
- Watchers 31
-
- Tags
- 392 gladiator
tcabece
Well-Known Member
- Thread starter
- #17
Rich: I think Jeep Speed Shop is close to offering one. Todd (Jeep Speed Shop) has some great video's on youtube. I can't say enough about Tyler the owner of Tom's 4x4 SuperStore in Chattanooga. He was very helpful. They may offer a kit now? I went the DIY route. If you're sort of mechanically proficient, you could do it. Really the only welding you have to do is on the Frame perches. They are different for the 392. Tom's does make a one piece (LF/RT) side that self locates. These are much easier then the 4 piece each side OEM ones from Jeep. Those ones you have to hang your engine and trans from the trans cross member and engine hoist to figure out where they go. I also believe ( SoFlo Custom Parts ) out of Florida offers a kit? SoFlo Customer Parts I just Googled, I have not dealt with them
Hemy5587
Well-Known Member
https://soflocustomparts.com/products/jeep-gladiator-v6-to-6-4l-hemi-v8-392-engine-swap
Except you don't get a transmission, evidently you can use the 3.6 transmission if you have less than 90k miles? The whole kit shipped for $25k but I like your approach better tcabece!
Except you don't get a transmission, evidently you can use the 3.6 transmission if you have less than 90k miles? The whole kit shipped for $25k but I like your approach better tcabece!
Rcoe
Well-Known Member
Looks like more options for someone who wants to DIY are starting to come.
Looking to do something this spring after we get back from Moab. I have a hoist to lift the body off, can weld and do the work just don't want to be tracking down a bunch of small parts and stuff. I can source the engine and trans have seen quite a few of them locally.
Thanks for the links.
Looking to do something this spring after we get back from Moab. I have a hoist to lift the body off, can weld and do the work just don't want to be tracking down a bunch of small parts and stuff. I can source the engine and trans have seen quite a few of them locally.
Thanks for the links.
ChrisNLA
Well-Known Member
They are recommending 90K or less with a 392.
If I was doing a 5.7L swap, I'd keep my old transmission without a second thought, regardless of mileage...if it bolts up with no issues.
Edit: Complete late model 5.7's with 'low' miles are going for $3,000 ish on eBay. Sign me up for DIY
Sponsored
Hemy5587
Well-Known Member
Either way I thought the 850RE that was mated to the 3.6 in our trucks was only rated for up to like 369 ft lbs? Both the 5.7 and 6.4 are beyond that rating. Not really a make or break, well it might break, deal for me just an observation. I have been watching ebay for a few years now and that set up for that price has been pretty consistent. I originally was watching due to wanting to swap in a hemi into my 1989 YJ replacing the 4.2.They are recommending 90K or less with a 392.
If I was doing a 5.7L swap, I'd keep my old transmission without a second thought, regardless of mileage...if it bolts up with no issues.
Edit: Complete late model 5.7's with 'low' miles are going for $3,000 ish on eBay. Sign me up for DIY
ChrisNLA
Well-Known Member
Probably, but it wouldn't stop me from trying
But I digress, DIY or not, also not a project I'm likely to dive into.
Sure is fun to see the options getting better, though.
AstroZombie
Well-Known Member
very cool
nanook12
Well-Known Member
Use the diesel ZF 8HP75, somewhere around a 555 torque rating…my deleted diesel is turning out more than 500lbs of torque and the transmission is solid. What is the torque out of the 392?
Sponsored
tcabece
Well-Known Member
- Thread starter
- #26
Rich: I didn't remove my body. The 3.6L came out easy through the front. Grill and radiator fairly easy to remove. Didn't even remove the bumper or winch. I did put the 392, 8HP75 Trans and MP1622 transfer case in as one unit. The one piece motor "perches" are the easiest way to go. The 8HP75 for the Wrangler 392 has a unique (only it uses) bolt pattern, for the transfer case, also a unique 43 spline output shaft, you guessed it only the 392 Wrangler uses. I did source a MP3022 transfer case from a 392 Wrangler first. You then take the front half of the MP3022 and bolt it to the internals and back half of the MP1622. The internals are the same, other than the clutches, the MP1622 can take the torque and HP of the 392. Proof point, the 3.0L diesel uses the MP1622 and has nearly the same torque as the 392! You can then take the front half of your MP1622 and bolt it to the back half of the MP3022 and sell it. It would just be an MP3022 for the 850RE Gladiator/Wranglers. Even if you do have an MP3022 (quadra trac) currently in you Gladiator. It won't bolt up to the 392 transmission. If your thinking of using a truck or car 6.4L? Jeep Speed Shop has some good videos on what needs to be changed to get them to fit. The Truck 392's intake exist to the right instead of the left. The car 392 has a front sump oil pan that the jeep needs a rear sump. The 2021 392's used an aluminum oil pan. A lot of folks didn't like that. Later ones just use a metal pan. You can pick up metal oil pans from a 5.7 truck very reasonably. The Jeep 392 also has a unique timing cover that puts the alternator up high. This is because the electric power steering pump would be in the way of any "low hanging alternators". Both the car and truck 392's have low hanging alternators. Todd at the Jeep Speed Shop has videos that discuss that. Even the Mopar Crate 392 has the car timing cover, which hangs the alternator low. It was a fun project to do. I highly recommend doing it!! I am in Colorado, if you have time on your Moab trip stop by! - Tim
tcabece
Well-Known Member
- Thread starter
- #27
CNASH: I wanted to keep my manual too. But aside from a 20 year old Getrag238, NV4500 or G56, there aren't any other options. You're not going to get the electronics to work. I heard AMW did this for a customer but the cruise control wouldn't work. Also I think they still needed some electronic conversion box to get the speedo to work. Keeping the MP1622 transfer case does let you do 2H! But you're right a 5 speed manual 392 Jeep would be the BOMB! Changing mine out also necessitated changing the instrument cluster wiring harness. Which was easily 60 more hours of work tearing the dash apart. You still need to change the wiring harness under the hood. Oddly called the dash harness. But once the engine is out it's easy to do. It is certainly a project worth doing! Tim
cnash
Active Member
I've heard from a few places (AMW, SoFlo and one other I can't remember right off hand) that they "can" do a swap with a manual, but they have not specified which trans.
tcabece
Well-Known Member
- Thread starter
- #29
Nanook: I am not sure the Diesel bellhousing is the same as the Hemi? The 392 is 480/480 HP/Torque. If you have the select trac transfer case (MP1622) you could use that. However the Jeep 392 8HP75 has a unique transfer case bolt pattern and the output shaft is, 43 spline. Even if you have an MP3022 (quadra trac) transfer case today it won't bolt up to the transmission. The diesels do have almost the same wiring as the 392 Wrangler. I believe you have the "long" battery box and your ECM is on the right side. One odd thing about the 392 Wrangler (Rubicon Unlimited's) They don't use the rock trac (4:1) transfer case that really make a Rubicon a Rubicon. Jeep figured the 392 had enough torque to necessitate the need for the rock trac transfer case! - Tim
tcabece
Well-Known Member
- Thread starter
- #30
Cnash: Let me know what you find out? I miss my manual. There is brand new getrag 238 for sale on ebay right now!! On paper the getrag 238 won't take the HP/Torque of the 392. They did uses it behind the 5.7 Hemi's and 4.7 (not a hemi but same bellhousing bolt pattern). But that was when Mercedes owned Jeep. The consensus is that the German's over built the Getrag's! Good Luck - Tim
Sponsored
