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3.9L V6 to 5.9L V8 swap help

Old Jul 13, 2011 | 01:22 PM
  #11  
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Won't bolt to the stock trans. (bellhousing if manual, and it is separate from the trans....) V-8's had a different pattern. T-case should be the same though??? (which one ya got?)

Need the engine, (obviously....) trans, v-8 wiring harness, PCM, correct engine mounts, and assorted other little pieces. (radiator, for instance....) Also not sure if the lengths are going to end up being the same.... (might have to alter drive shaft lengths. not too sure there though......)
 
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Old Aug 7, 2011 | 05:26 PM
  #12  
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i have a 3.9l dakota 2wd and want to swap it out with 5.2. will the tranny match up?
 
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Old Aug 7, 2011 | 06:00 PM
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Originally Posted by jackson5
Wrong.
From the 95 and 96 factory service manuals:
The NV3500 is a medium-duty, 5-speed, constant
mesh, fully synchronized manual transmission. Fifth
gear is an overdrive range with a ratio of 0.0729:1.
The NV3500 is used with 3.9L and 5.2L engines and

is available in two and four-wheel drive configurations.

The NV4500 is a five-speed, constant mesh manual
transmission (Fig. 1). All gear ranges including
reverse are synchronized. Fifth gear is an overdrive
range with a ratio of 0.74:1. The transmission has a
cast iron gear case and aluminum shift cover.
Two versions of the NV4500 are used. A standard
duty version is used for 5.2L and 5.9L applications
and a heavy duty version for VIO/Cummins diesel
applications. Main differences are the larger diameter
input shaft, output shaft, and mainshaft fifth
gear in the heavy duty model. The different size
shafts and gear do not affect service. Overhaul procedures

for the two versions are the same.

Dave
 

Last edited by xjarhead69; Aug 7, 2011 at 06:03 PM.
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Old Apr 18, 2021 | 10:23 AM
  #14  
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Originally Posted by Racer26
I have read tons of threads on this subject, but so far, none of them have given me a clear answer.
I currently have a 2001 1500 with the 3.9L V6 and the NV3500 manual transmission. I am wanting to swap in a 5.9L V8.

Will the transmission hold up with the additional power?
I am wanting to do the same thing if you find out any information let me know it would be awesome
 
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Old Apr 18, 2021 | 10:35 AM
  #15  
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Originally Posted by Chad Huber
I am wanting to do the same thing if you find out any information let me know it would be awesome
Ten year old thread.....

The NV3500 will hold up behind the 5.9, so long as you don't beat on it. That trans never came behind that engine from the factory. 2500 trucks got the NV4500 with the 5.9.

It's life will depend a lot on how you plan to use your truck.....
 
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Old Apr 18, 2021 | 06:35 PM
  #16  
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Originally Posted by HeyYou
Ten year old thread.....

The NV3500 will hold up behind the 5.9, so long as you don't beat on it. That trans never came behind that engine from the factory. 2500 trucks got the NV4500 with the 5.9.

It's life will depend a lot on how you plan to use your truck.....
This I snapped an input shaft just accelerating up a hill
 
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