What would it take too swap out a G56 for a NV5600 or a built auto?

What costs would be involved other than the tranny itself??

Thanks for the help
Jon.

 

If ya' had a donor & all the parts, I bet the G56 to the NVG would not be that bad.

 

I can understand why you might want to swap to a automatic tranny but I'm curious why you would consider a swap to a NV5600?

While the NV5600 is a proven cast iron trans, the aluminum G56 has stood up very well behind
some very high HP trucks after the dual mass clutch is upgraded. Oneton's truck from Sicamous B. C. comes to mind.

Reports seem to indicate that the G56 shifts smoother and quicker than the NV5600.
The 05-07 short OD gear can be corrected by taller tires & the 07.5 G56 got a taller OD gear similar to the NV5600.
The NV5600 is now out of production also.

Am I missing something? Why swap the G56 for a NV5600?

...Joe

 

I agree that the G56 is a smoother tranny....but when you explode 4th gear in 2 brand new trannies and the input shaft in the other one......yep thats 3 trannies, all in 2 months. So it is time too move on.

 

bump....anyone else?

 

G56's are proving to be unreliable in high hp trucks. My brother destroyed 4th gear in his. Mett another DTR member this past weekend, who has had 2 go out on him. There are threads of people having failures all over these sites. Tac

 

Sorry guys, I wasn't aware of the failures of the G56 trannys.

Just off the top of my head:

- NV5600 flywheel & aftermarket clutch
- NV5600 bellhousing. The clutch hydraulics are the same
- NV5600. I'm sure Dodge didn't change the transfer
case bolt pattern but...

I'm considering a dually conversion and nearly bought a Mega-cab dually this spring.
My plan was to swap parts between the 2 trucks and then re-sell the other truck.
You could do the same. Any loss on reselling the donor truck would be the cost of the parts.
In your case most new buyers wouldn't notice the difference between the 2 transmissions.

As someone else once said, I'll be outside hugging my NV5600..

...Joe

 

Call me weird, but I prefer the shifting of the NV5600. It feels nice and solid. There's something "light" and "car-like" with the G56, IMO.

I would not recommend swapping out to another manual. Go automatic. Gain 2 seconds in the quarter w/o adding any power. Several builders can make the trans hold all the power you can throw at it. $10k and you're done. It's what I should have done with my '03.

 

So your saying the auto swap should only cost $10K?? That is what i was thinking, but just kind of wanted some backing on that.

But I doubt I'll gain 2 seconds in the 1/4.....maybe a few tenths.

 

I don't know about your truck, but my truck would loose 30lbs of boost every shift in the 1/4 because of barking. I didn't have the heart to powershift my transmission, but I did shift fast enough to grind gears. All that lost boost is a lot of wasted time. I was told based on my dyno numbers that I should have a 12 second truck with an auto, but I could only manage mid-14's at best. Maybe I suck at drag racing???

Anyway, a nice built auto is going to cost you what, maybe 7k? Then you need an ATS valve body and controller (slick setup, fully programmable), and there's a trick shifter linkage that goes right in place of your stock shifter and looks factory. (IIRC some guy on DTR did the swap and documented it) I forgot who makes it, but it eliminates the need for swapping steering columns, shifter, and cable etc. I think you also need front and rear drive shafts.

So, $10-12k minus what you sell your manual trans for...

 

JCleary is refering to my conversion. So far I am very happy with the results

Here is the thread: https://www.dieseltruckresource.com/...d.php?t=150347

 

I would do the NV5600 conversion. You would have the strongest tranny and there would be a lot less hassle to do it. Just pick up a NV5600 out of a wreck and the driveshaft if you can. It should be a bolt-in conversion. I am sure there has been sled pullers converting on here.

The whole 2 second thing I doubt. I am running just as fast and sometimes faster than built autos with similar horsepower. If I work on traction issues off the line I know I can get 1/10th off the 60' and with a little shot of juice 2/10th's. Besides that, its just cooler banging those gears than just hitting the skinny pedal and hitting the lock up switch.

 

Well I would prefer too stick with the manual. I still haven't achieved my goal of reaching the 11's......even though I am pretty sure i would have if this last g56 hadn't have blown 4th gear apart. I had a 60' of 1.72 and a 330' of 5.126....in comparison my 12.90 was done with a 2.134 60' and a 330 of 5.617.