Dumb Azz Question Of The Day

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yellow rose

yellow rose

Overnight Sensation
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This is it...and it may be the dumb azz question of the decade. Here goes.

Does the junky 4.7 engine have the same bell housing bolt pattern as the LA/Magnum engines?

I can’t imagine that Chrysler would offer both platforms in the same chassis and use a different bolt pattern there, but I’ve been wrong before. Lots.

TIA
YR
 
Well yeah they could be "that dumb" after all they put some of the Jeep starters on the pass side............
 
Same bolt pattern, but the 545RFE needs all the computer gadgetry to work. I bought a low mile 545RFE to put in my 70 Duster, along with a 5.7 Hemi. I fell out of love with the whole Gen III swap idea, and ended up putting that transmission in my wife's 4 door Dakota when I put the new 4.7 in it. A 545RFE transmission makes an 833 feel like a feather! :eek:
 
I couldn't tell you, I let someone else work on the new junk. lol
Because I'm dumber than your question. lol
Are you buried over there yet ? at least the temps are coming up a bit.
 
So I could buy a Dakota with a blown 4.7 and stuff a 5.9 in it using the 4.7 transmission?
 
Jadaharabi said:
Why wouldn't the 5.9 use the same sensors as the 4.7 to control the transmission?
Click to expand...

It may, I don't know. You didn't say anything about "keeping" the computer, now, did you? lol I'm sure you could make it work.
 
RustyRatRod said:
It may, I don't know. You didn't say anything about "keeping" the computer, now, did you? lol I'm sure you could make it work.
Click to expand...
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What I wanted to know is if I can yank that blown 4.7 out and throw a 5.9 in there hooking everything back up that the 47 had on it and drive the vehicle. Is it possible to do that?
We probably have to change the exhaust manifolds.
 
What are you going to do about the computer? The 5.9 computers don't have controls for the trans, and the 4.7 computer likely has a very different map than the 5.9 needs for fuel/ timing. Or are you converting to carb??
 
67Dart273 said:
What are you going to do about the computer? The 5.9 computers don't have controls for the trans, and the 4.7 computer likely has a very different map than the 5.9 needs for fuel/ timing. Or are you converting to carb??
Click to expand...
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Using the 4.7 computer with a 5.9 magnum with the kegger intake. Is the firing order the same? I would think so.
Would probably have to adapt the 4.7 injector system to the 5.9.
 
67Dart273 said:
What are you going to do about the computer? The 5.9 computers don't have controls for the trans, and the 4.7 computer likely has a very different map than the 5.9 needs for fuel/ timing. Or are you converting to carb??
Click to expand...

That's what I thought he meant. his original post about the idea didn't include the computer. You could sure do it carbed, though.
 
Jadaharabi said:
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Using the 4.7 computer with a 5.9 magnum with the kegger intake. Is the firing order the same? I would think so.
Would probably have to adapt the 4.7 injector system to the 5.9.
Click to expand...

From what I can find, yes, it appears to be and has the same cylinder layout.
 
RustyRatRod said:
From what I can find, yes, it appears to be and has the same cylinder layout.
Click to expand...
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The reason I ask if this could be done is because there are so many Nice Durango's and the Dakotas in this area with blown 4.7. And you can find the 5.9 and the 5.2 magnums in Dodge pickups that the bodies are just rotted away.
 
Jadaharabi said:
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The reason I ask if this could be done is because there are so many Nice Durango's and the Dakotas in this area with blown 4.7. And you can find the 5.9 and the 5.2 magnums in Dodge pickups that the bodies are just rotted away.
Click to expand...

Yeah I've seen a few myself around here. Do you know why? I can tell you. I talked to a Jasper Engine rep several years ago. The oil pickups for the 4.7 were too small. Oil cooked on the sides and eventually restricted the oil pickup causing engine failure. He said they put over sized pickups on all the 4.7s and that solved the issue. Regardless, I never liked the 4.7. Everybody I've known that had one hated it because it was a gutless wonder and got crap for mileage. Or spun a rod or main bearing. lol
 
67Dart273 said:
What are you going to do about the computer? The 5.9 computers don't have controls for the trans, and the 4.7 computer likely has a very different map than the 5.9 needs for fuel/ timing. Or are you converting to carb??
Click to expand...


It’s going to be a carb deal and I *THINK* because I haven’t had the chance to get under that pig and see I think it has a GV3500 or whatever that 3500 is.

He wants to leave the stick in it, so that cleans up some of the computer stuff. I just don’t know what has to be used to make the truck run.

This will be a real wing nut of a project and I got snookered into it.
 
He brings up a really good question. I know for a FACT you can throw a 5.9 where a 5.2 was and use the same computer. I've seen it done BOTH with the LA AND Magnum. Worked just fine and ran like a dang top. Until he tries it, I say anything else is just bench racin'. Yeah, he'll probably have to end up carbbin it, but people have proven theory WRONG before! lol
 
I doubt the same computer from a 4.7 will run a 5.9. A 5.9 has a distributer, and a 4.7 doesn't. You might get lucky, and the tooth count on a 4.7 flywheel will be the same as the one for a 5.9.....and the bellhousing and all that junk will work back. Then you can just rig up a wiring harness for the carbed 5.9 and go down the road.
 
The 4.7 version will bolt up to a 87-3.9 however there are some differences. The flywheel cover has a different bolt pattern, and if its 4wd, the (plates?) that tie the engine block, differential, and transmission together have to be modified for the different bolt pattern on the bottom of the bell housing.

I dont have a good picture to show you but here is what I have.
Will try to get a better picture for you.

20150826_114108.jpg
 
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