My NV271 has no additional mount like you are talking about. And they ARE way bigger than the 1356/4407 just like the ZF6 is way bigger than the ZF5.

A case will tear itself apart from vibration no matter how securely it is mounted.

As for seeing 4407s, YUP I have 3 trucks with them. Only real difference between them and a 1356 is the 4407 use a flat flange to attach rear drive shaft and 1356 use a slip yolk

 

Nothing to look at. Just an aluminum case that looks just like a 1356

 

The lighting is kinda poor.
BW 44-07 left, BW 13-56 right.

I disagree. That is the major appearance difference yes, but not the only difference.
The BW 44-07 is almost twice the weight and the internals are much bigger too.

 

It looks like the BW 4407 would be stouter than the 1356, would there be any advantages in replacing a 1356 with a 4407? has someone done it?.

On Edit, apparently it's a bolt-on upgrade, hmmm... me likes...:

http://www.pirate4x4.com/forum/showthread.php?t=504753
http://www.fullsizebronco.com/forum/...ad.php?t=94787

 

I've done it for the stronger internals. You need the driveshaft to go with it though.

 

Mine is a Bronco, so I don't know how that would work for me. Is it a shorter driveshaft? if that's so then a regular cab short bed F-150 driveshaft would probably work.

 

You'd have to have one custom made then. You need a driveshaft with a slip joint in it.
Maybe something out of the late 70's may work but that's a long shot I think.

 

My truck is a 139" wheelbase with a ZF & a 4407. The driveshaft is 1 piece with a slip joint, and it's LONG driveshaft-probably 6 feet long.

 

I still think you guys are touching your selves. Guys are putting 600+ HP thru both t-cases doing 4 wheel launches on pavement and dragging a 30,000lb sled down a dirt track with ZERO issues .

I dont see why YOU think you need a 4407 over a 1356 and then also a extra support. I would like to see JUST ONE example of a broken t-case from lack of support

 

My two cents is this - if you a driveshaft wheeling, and it is causing enough vibration to cause the tranny case to crack, it is also causing damage to other parts.

To me, it is time to fix the truck before driving it, trailering it home, or pull the rear driveshaft and proceed home on the front axle.

But in no way would I beef up something to try and drive the truck with that severe of a vibration because if the tranny doesn't break, something else is likely to.

Part of the cost of wheelin' is those long tows home when stuff breaks..

My two cents... David

 

I think you missed the point. Adding the support to the T-case (not an odd idea, many trucks have it, Fords as well) is not to prevent damage do to a current problem as I have no problem with my truck. Adding the T-case support would prevent a snowball effect if my driveshaft were to ever get damaged in the future while out wheeling. As I said before in case you missed it, driveshaft vibration caused by a dent while off roading resulted in my transmission cracking in half on the highway after wheeling. With the enormous BW4407 just hanging off the back of the aluminum tranny to T-case mount, once the driveshaft vibration started as I was going down the highway, the driveshaft weight shaking got the T-case shaking and all that weight hanging and vibrating cracked the transmission in half. Before my driveshaft got dented that day there was nothing wrong with my driveline except for a poor design on Fords part by having that much weight just hanging on the transmission. Yes, if all things are well with the truck there is no threat of damage. If the driveshaft gets out of alignment suddenly, I'd like to have the security of knowing the transfer case is only going to be able to shake minimally and it wont be tearing itself away from the transmission. I would never intentionally take my truck down the highway knowing my driveshaft was damaged. I never even knew my driveshaft was dented until I got up to speed and by that time it was too late.

 

Why is it so hard for you to understand what I'm saying? I've explained what happened to me and under what circumstances a support is necessary yet you refuse to listen.

 

Not to be rude but is there something wrong with you? You keep insisting on acting like you know it all when nothing could be further from the truth. If you know so much about the 4407 you'd know that it has almost NOTHING in common with the 1356 as shown in the photo posted on this thread so now what do you have to say about it?
Now, about the NV271/273 not having a support, I suggest you go to a Ford dealership and check out the new trucks because some of the heavier GVWR trucks have T-case support so that's strike two on you.
Strike three comes from you saying the NV271 is "way bigger" than the BW4407. Yes, the 271 and 4407 are both way bigger than the 1356 but the NV271 and BW4407 are almost the same weight. I've worked on my friends Superduty and helped him install his T-case and from my own measurements the NV271 case body is thinner than the 4407 and has less webbing reinforcement. I've benchpressed my trucks 4407 when I reinstalled it after I replaced my tranny and can tell you first hand both cases mentioned are about the same weight. The 271 is slightly taller in case body from south to north but the 4407 is beefier if you compare the two from a top or bottom view.
My old man use to tell me before he left this crappy earth that "If you don't know for sure what you're talking about, don't go claiming you do like a fool" I don't wish to namecall but I suggest you look into what I'm saying a little deeper before you claim something else that turns out to be incorrect. Anyone else have experience with these two cases?

 

Well I know for a FACT the 271 does NOT have a t-case support. DO I need to show you pics of my truck?


And just because you screwed something up(bending the driveshaft) and tried to drive on it doesnt make having at-case support necessary

 

Hmmm, so it's like I could say the 300 and 351 engines don't exist because I have neither in my truck? do I need to show you pictures of my engine bay? flawless logic...