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3.9L to 5.9L engine swap

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Old 10-01-2010, 12:07 AM
Danthedakotaman Danthedakotaman is offline
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Exclamation 3.9L to 5.9L engine swap

Hey guys, I currently got the 3.9L V6 with zero ***** and wanna throw in a 5.9L, would it fit and can the tranny take the extra strain?
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Old 10-01-2010, 12:11 AM
Danthedakotaman Danthedakotaman is offline
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or is the 5.2L in general a better engine?
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Old 10-01-2010, 12:50 AM
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I personally like the 5.2 because of the slightly better MPG, and more metal in the block, but then again I am not going for power.

No, your trans won't take the 5.9. It will fit though.
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Old 10-01-2010, 12:58 AM
Danthedakotaman Danthedakotaman is offline
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yea i read that the 5.2 is not bad at all, it would fit without any major changes?
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Old 10-01-2010, 10:37 AM
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Quote:
Originally Posted by Danthedakotaman View Post
yea i read that the 5.2 is not bad at all, it would fit without any major changes?
Well that depends on what you consider major changes. You are changing out your drivetrain so.... neither the 5.9 or 5.2 are bad engines. I just like the 5.2 for my purposes more. Read the faq for info on the swap.
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Old 10-04-2010, 02:05 AM
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Danthedakotaman what year is your truck? I can move it into the proper section.
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Old 10-04-2010, 08:29 PM
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Quote:
Originally Posted by Danthedakotaman View Post
Hey guys, I currently got the 3.9L V6 with zero ***** and wanna throw in a 5.9L, would it fit and can the tranny take the extra strain?
what year truck do you have and what year 5.9 are you planning on using
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Old 11-11-2010, 09:38 PM
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just so you know what ever motor you do end up doing it has to be the same year as your truck or newer to pass inspection.
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Old 11-13-2010, 11:39 AM
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Actually that's not entirely true, to pass emissions it varies from state to state. In my area, I was told I need to maintain all of the same emissions controls which are listed for my vehicle and pass emissions. Also, if you are OBDI, they don't even test those vehicles in the Chicago area anymore. My brother out in Vegas does have to still pass emissions with his 1993 Dakota, so it all just depends.
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Old 04-08-2011, 03:17 PM
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A swap from a 3.9 to a 5.2 is easy as far as the hardware goes if it is a LA to Magnum swap. Same motor mounts, flex plate and torque converter. Now if you go to a 5.9 it is a different ballgame.What I did was replace the entire drive train from a donor wreck. The output of the trans is the same for all Automatics. If you are going to put theV8 into a 1st gen Dakota then you will have to remove the fan and put electric fans in front of the radiator as the v8 is 4.4" longer than the V6. Not hard but be aware.
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Old 04-08-2011, 03:17 PM
 
 
 
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3.9l v6, 5.9l v8, dakota, engine swap

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