There didnt seem to be much interest in my last posts about the NV5600 so pardon if this is getting old.

I am still considering the nv5600 swap into my 2000 dodge but I want some opinions. I just spoke with a shop that sells them and they said dont do the swap. That seemed weird to me since they were selling one. Anyway they said they are impossible to get parts for anymore. Is this true?

 

yes this tranny is no longer made and some of the parts can be very hard to get, as well as there is basically no NEW nv5600's anywhere, they are all remanufactured units now

 

what about the new 6 speeds, getrag? Will these fit in place of the nv5600? Could you swap one of these in instead?

 

I have no idea but I would be interested in finding out. Except that I bet they are not cheap.

 

I also wouldnt mind if someone tells me I'm stupid and I should just stick with the NV4500. I would like to know why though.

 

What is it that you are trying to achieve by doing the swap. Ive done lots of different changeovers thru the years and some have worked out well,some left a bit to be desired. I love being told that I cant, or it will never work. I can...and it will work. You can ...and it will work. The only real question is why?

 

Well really just 3 reasons. I know both are beafy so that is not a concern.

1. In my 4500, 1rst gear is too low and 2nd is too high for take off. The 5600s I have driven have a nice 2nd gear for take off. However, I dont have any mods yet to the motor so maybe I just need more power...

2. I haul heavy loads sometimes and I have wanted closer gears.

3. I'm a gear head thats been hot rodding for years.

 

1. I think that is the same in both w/ 3.54 gears. I always start in 1st unless facing downhill. My truck weighs over 9,500 llbs though.

2. Yes that is better.

3. I hear yea .


I don't know where you are but Blumenthals in OKC does a great job in about 6-8 hrs.

 

NV4500 2nd gear is 3.04
NV5600 2nd gear is 3.38

I can tell a difference.

I am in Memphis TN but am familiar with OKC. Are you talking about a trans builder or a service shop? I do my own wrenchin...

 

if you cant get parts for the 5600 then parts for the 4500 shouldnt be available because they are made by the same company. if you ad some power you should be happy with the 5spd it shifts faster. i would put a temp gauge and some transcoolers on it and if you get a chance upgrade the input shaft i've busted the gears on those about 5 times now. in the previos 98 and the 03. last time i checked the g56 was about 6k. to do the swap requires new flywheel clutch and moving the crossmember and changing the driveshaft and thats it. i found a good deal on one and i'm going to buy it as a back up for my 4500 when i break it again 3 time s on the 03 so far, was also told 5600 have their own problems tho my .02

 

Youre reasons sound good enough to me especialy #3. I have a question for ya. the 56 is only found behind the HO. What makes it an HO. Is it the 6 spd or is there something more.
I bought my X wife a very nice Volvo once. A 740 dohc with a 5spd. Awesome car...Very zippy...fun to drive. It wasnt long before she was tired of the handshaker but wasnt prepared to part with the car so I bought a second with automatic and changed over both cars. The doner was a single cam. As was the case with a lot of dohc's it lacks torque on the low end and develops good HP in the top. The swap killed the car for me. She of course loved it, but for me it felt sluggish. The boy I sold the doner car too loved the 5 spd.
I guess my point is make sure theres not some not so obvious obsticles to getting what youre after. Look at the gearing in the final drives and compare.Im still wondering what makes an HO a HO.

 

You could get the NV5600 with a SO engine, not real common but it was an option, and there are a few.

The HO has a little more power, (of the top of my head I am gonna say 20 hp and 60 lb) it is because of slightly different VP-44, and I believe slightly h.different programing on the timing and such.

OD is the same in both, I believe first is the same, or very close, the rest of the gears are closer to make room for theire new friend. It would be a great swap, several mambers have done it, not to much work I have heard. But the pats avallibility is an issue now that it is no longer made. Plus it shifts slower.

 

They are both.

 

in 99 and 2000 you could get the 5600, but it had the small input shaft that was known to break. in 01 dodge introduced the HO model which like stated above had some injection pump changes, and tuning changes that increased the power output. the HO was only available with the new upgraded nv5600 and 13" clutch.

the SO motor was 235hp/460tq
the HO motor was 245hp/505tq

they dont make parts for the 5600 anymore, just that tranny, the whole company didn't go under. they still make the nv4500, not the 5600 tho

 

Also, sixth is .73 in the NV5600
5th is .75 in the NV4500

You could get the 6 speed in 99 and 00 as a Standard output, but this 6 speed used the same smaller clutch and input shaft(12" and 1.25" of the 5 speed). The 6sp behind the 01 and up HO got the upgraded 13" clutch and 1.375" input shaft.

I think if my 6 speed takes a dump, I would switch to a built auto.