twack
Full Access Member
Man with my jeep knocking im seriously tempted to do this, but i want to see you do it first!
OK, so let's be serious...4.7l swap.
- Thread starter JeepCoMJ
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well, I will be making two sets of motor mounts. Always easier to do two as two takes 1/4 of the time if you're already set up for it.
I could also have a spare ECM flashed and make a harness for you, but this swap is only going to work on an 02 or 03 with 45RFE and JTEC
I could also have a spare ECM flashed and make a harness for you, but this swap is only going to work on an 02 or 03 with 45RFE and JTEC
twack
Full Access Member
keep me posted on that
Short update with some teaser pics
engine/trans in, trans mounted. Need to think about motor mounts. But mocking up I can see what will and will not fit.
The intake manifold on this one is not one that I will be using. I have the appropriate jeep one along with computer etc. from an 02 jeep grand cherokee. This motor still needs the tone rings swapped on the crank, and cleaned up, but I want the mounts and exhaust done before I ever get to that point, so that it's purely a mechanical issue and electrical to finish.
pics.
fuzzy, but k-member and suspension back up and in
this will need to come back out to be degreased properly before the jeep is able to go back together for final assembly
Motor in with trans bolted up. pan is on a 2x4 wood block between axle and oil pan to hold it in position without the hoist.
driver side motor mount. I'm thinking that the grand cherokee motor mounts should work out for me.
passenger side motor mount
The heater hoses will need to be stretched, in the middle, so that the reservoir and heater core can be hooked up and look proper.
here is your fan hub clearance. You can NOT use a factory e-fan. I will have to cut the e-fan out of the e-fan only fan shroud, and install one directly on the radiator, with a pusher on the other side. The fan shroud itself will then fit in order to duct air efficiently
Power steering gets a little tight but the hoses will all reach and fit with plenty of flex. There's actually too much hose to the U and the cooler, but no big deal
Here's how it sits with the v8 in it. Obviously it will drop a bit more with full fluids, driveshaft, exhaust, everything else assembled. I'll be wanting diesel springs, but it didn't drop the height by too much
This is where it will sit for a week or so while I finish up the engine replacement on the black 02.
engine/trans in, trans mounted. Need to think about motor mounts. But mocking up I can see what will and will not fit.
The intake manifold on this one is not one that I will be using. I have the appropriate jeep one along with computer etc. from an 02 jeep grand cherokee. This motor still needs the tone rings swapped on the crank, and cleaned up, but I want the mounts and exhaust done before I ever get to that point, so that it's purely a mechanical issue and electrical to finish.
pics.
fuzzy, but k-member and suspension back up and in
You must be registered for see images attach
this will need to come back out to be degreased properly before the jeep is able to go back together for final assembly
You must be registered for see images attach
Motor in with trans bolted up. pan is on a 2x4 wood block between axle and oil pan to hold it in position without the hoist.
You must be registered for see images attach
You must be registered for see images attach
driver side motor mount. I'm thinking that the grand cherokee motor mounts should work out for me.
You must be registered for see images attach
passenger side motor mount
You must be registered for see images attach
The heater hoses will need to be stretched, in the middle, so that the reservoir and heater core can be hooked up and look proper.
You must be registered for see images attach
here is your fan hub clearance. You can NOT use a factory e-fan. I will have to cut the e-fan out of the e-fan only fan shroud, and install one directly on the radiator, with a pusher on the other side. The fan shroud itself will then fit in order to duct air efficiently
You must be registered for see images attach
Power steering gets a little tight but the hoses will all reach and fit with plenty of flex. There's actually too much hose to the U and the cooler, but no big deal
You must be registered for see images attach
Here's how it sits with the v8 in it. Obviously it will drop a bit more with full fluids, driveshaft, exhaust, everything else assembled. I'll be wanting diesel springs, but it didn't drop the height by too much
You must be registered for see images attach
This is where it will sit for a week or so while I finish up the engine replacement on the black 02.
TwoBobsKJ
Full Access Member
Looks great!
It seemed that the biggest fitment issue would be the motor mounts - wondering where they are located on the 4.7 relative to the 3.7. Looks like you have a solution.
Keep us posted! :waytogo:
Bob
It seemed that the biggest fitment issue would be the motor mounts - wondering where they are located on the 4.7 relative to the 3.7. Looks like you have a solution.
Keep us posted! :waytogo:
Bob
jeeptorino68
Full Access Member
looks awesome
this swap will only work with an 02 or with one that came with a 45RFE...and has the same computer system as the 16 tooth 4.7. you're looking for a world of hurt.
also, why on earth are you even going to try to swap a 392 in for a hemi....even if it's new gen, the hemi is gonna be more powerful with less chance of breaking
Hey Brutha,let me know how this goes, If all goes smooth I'll do the same...are you upgrading the drivetrain to avoid failure?
DJSKJ
Full Access Member
"OK, so let's be serious...4.7l swap."
I not so smart, but I think that a oxymoron.
I not so smart, but I think that a oxymoron.
The drivetrain is exactly what came with the 4.7l wj's. the 45RFE is the same strength as a 545RFE and is internally almost identical...it won't break. 242 won't break, and the 29 spline 8.25 is about as strong as a d44, so it will take it. had a 270hp 4.6 stroker in front of an aw4 and an ax15 with 242 and d44 as well as with an 8.25, never had an issue.
as always, the dana 30 is the weak point. it will be fine as a DD
TwoBobsKJ
Full Access Member
tjkj2002
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Or SFA it.
or no, because the solid steel is wasted money, and SFA is worthless wasted money...you then open the door to NEEDING a dana 60 rear because IMHO, there's no point doing axle swaps without going overkill...anything smaller is gonna break.
don't swap a solid dana 30 into anything it didn't come in. it's still going to break.
don't swap a solid dana 30 into anything it didn't come in. it's still going to break.
tjkj2002
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I would do my SFA swap all over again without thinking twice and for the type of wheeling and area there was just so much you could do with IFS and no I would never own a Wrangler,they ride like a$$.
Ummm....yeah, the 392 IS a hemi, it's the one they put in the new Challengers, Chargers and 300's...:emotions34:
Considering I'd be swapping engine and trans along with computers (providing it would actually fit), it's PCI to PCI. It can be made to work. Only a ****** would try to use the 3.7 PCM to control a 5.7
tjkj2002
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If your planing on a HEMI swap you will need to do a SFA swap or be forever stuck as a 2wd KJ.No room for the front diff and oil pan,even if using the Grand Cherokee oil pan.
Where'd you get the measurements?
tjkj2002
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From someone that has done a HEMI swap in a KJ.
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