Search for
Login | Username Password Forgot? | Email: | Create Account
Automobile | Popularity: 0 | Entries: 29573 | Modified: 3h 12m ago | | Add to My Feeds
Hi guys! Hope you don't mind a second generation guy jumping the fence to ask you some questions about the Getrag and NP205 trucks.

I'm converting my '96 from a NV4500 to NV5600. While I'm doing that, and having the driveshafts altered anyway, I'm also trying to install an NP205 to replace my NP241DLD.

I just aquired a Ford NP205 with the 31 spline female input. The NV4500 and 5600 have 29 spline output shafts, so I was looking at buying Advance Adapter's kit to mate the two. It is just an aluminum adapter plate and a spud shaft with 29 spline input to 31 spline output. The aluminum adapter is only a couple inches thick from the looks of it in their photo.

What I don't like at all about their kit is the designed need to cut 0.600" off my tranny output shaft. I cannot for the life of me understand why they did not just make the aluminum adapter plate 0.600" thicker..?! :confused: The thought of permanently altering the output shaft of that NV5600 makes me cringe. Replacement parts are very tough to get.

The kit is actually intended to enable using an NV4500 in a Ford truck with an NP205; but you can see where it would work the other way, too. Fellow TDR member tlgdiesel turned me on to this neat little adapter kit (thanks!). It is expensive at over $400, though.

However, as I was reading some of the many websites with Ford and Dodge and Chevy NP205 info (mine have always been Chevy versions and I have several still), I found some information stating that the early Cummins Dodge's with the getrag and NP205 had a rare 29 spline input in the t-case. No other model does. This could be interchanged with the Ford 31 spline input since all the inputs with the large bearing will supposedly interchange on NP205's.

Furthermore, both the Ford NP205 and my NV5600 (4500 too) have a round bolt pattern. I have not compared the actual bolt pattern size and spacing yet to see if they would mate or not. Wouldn't it be great if they did?

What I would like to know is:

1) Has anyone here converted their 1st gen Getrag Dodge to an NV4500 or 5600? If so, how did you do it?

2) Is the getrag output shaft the same 29 spline and the same diameter as the NV4500/5600?

3) How far does the output shaft on a Getrag stick out beyond the mating surface?

4) Does anyone know where I can find a Dodge NP205 with that 29 spline input or at least the input shaft itself?

My hopes are that maybe by swapping in the Dodge 29 spline NP205 input shaft, I may avoid cutting my tranny output shaft as well as eliminate the need for the spud shaft from AA. Who knows? Maybe I could be lucky as a lottery winner and the bolt pattern and size of the NV5600 and Ford NP205 wilol match up, too! (dream on?).

I sure appreciate any info!

Thanks! Scott


More from TDR Roundtable

Sometimes NO POWER 08 Jan 11
Dodge Cummins Rv's? 08 Jan 11

^ Back To Top