The NV271 is not synchronized between hi/lo, nor is the NP205. Not to say you couldn't do it with either case, but they both definitely are meant to be shifted at a stop.
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Let's talk T-Cases
- Thread starter natemc
- Start date
Yeah just from 2hi -4hi. Every time I've tried it with a 205 I get ugly grindage and end up sitting a second while the internals quit spinning 
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Just always liked the ease of a 208-241.
Figured any of the moderns would be similar
. Just always liked the ease of a 208-241.
Figured any of the moderns would be similar
you got something weird going on some place . i have always been able to bump in/out of 4wd/2wd in high on stock 205 and in/out of front on my tripple stick doubler setup .Yeah just from 2hi -4hi. Every time I've tried it with a 205 I get ugly grindage and end up sitting a second while the internals quit spinning
Just always liked the ease of a 208-241.
Figured any of the moderns would be similar
get under and lube the snot out of the shift rails and linkage with some spray oil that clings . and if the shifter lever has the grease zerk hit that sucker . otherwise you might have worn shift rails and need new ones . i have torn down a lot of 205's and some heavy use on them the rails get a grove and can be a hang up spot .
i run lockout hubs and when there locked there is no problems.
Weren't some NP205's synchronized in later years ?..
I used to be able to put the one's I had in 4wd from 2Hi while rolling with no grinding--going from 2wd to 4Lo would grind if I didn't come to a near complete stop though..
I used to be able to put the one's I had in 4wd from 2Hi while rolling with no grinding--going from 2wd to 4Lo would grind if I didn't come to a near complete stop though..
I dont know of anything thats synchronized into low. 2h to 4h is the synchro 205 and the chain cases.
open diffs in my combos .3 different 205's lol. Maybe it's been the not locked up front thing.
Actually after the first 2, I haven't even tried with the 3rd now that I think about it
Just to make sure everybody is on the same page, let me expand on what I said.
I'm sure that there are transfer cases out there with synchros that will let you shift from 2 to 4 at speed even if the front end is not engaged.
But they do that by spinning up the front driveshaft to the same speed as the rear.
All the 205s, will shift into 4wd with no grinding if the front and rear driveshafts are at about the same speed. Obviously, when the truck is stopped, both shafts are at the same speed, namely zero.
But, if your front end is engaged and spinning about the same speed as the rear, then there should be no grinding. If you are in a slick situation, and the rear tires are spinning faster than the fronts are rolling, then you will get grinding again.
In that situation, I just back off the gas for a second, shift, and get back on the throttle.
If you are wanting to shift into 4wd while rolling, and it grinds, then for some reason the front end is not at the same speed as the rear.
Either wildly different size tires, or the front hubs are not engaged. The different size tires are going to cause trouble sooner or later, and if the front end is not engaged, then its a waste of time to put it in 4wd.
The one exception is when you have auto-locking hubs. In that case, you would need to either stop or have a synchronized transfer case.
But I doubt that many folks here are running autos.
If I remember right, automatic hubs were the reason for the short lived synchronized 205s so that the auto makers could advertise shift-on-the-fly.
In all my trucks since 1979, all with 205s, I have been able to shift-on-the-fly just fine as long as the hubs were turned.
I'm sure that there are transfer cases out there with synchros that will let you shift from 2 to 4 at speed even if the front end is not engaged.
But they do that by spinning up the front driveshaft to the same speed as the rear.
All the 205s, will shift into 4wd with no grinding if the front and rear driveshafts are at about the same speed. Obviously, when the truck is stopped, both shafts are at the same speed, namely zero.
But, if your front end is engaged and spinning about the same speed as the rear, then there should be no grinding. If you are in a slick situation, and the rear tires are spinning faster than the fronts are rolling, then you will get grinding again.
In that situation, I just back off the gas for a second, shift, and get back on the throttle.
If you are wanting to shift into 4wd while rolling, and it grinds, then for some reason the front end is not at the same speed as the rear.
Either wildly different size tires, or the front hubs are not engaged. The different size tires are going to cause trouble sooner or later, and if the front end is not engaged, then its a waste of time to put it in 4wd.
The one exception is when you have auto-locking hubs. In that case, you would need to either stop or have a synchronized transfer case.
But I doubt that many folks here are running autos.
If I remember right, automatic hubs were the reason for the short lived synchronized 205s so that the auto makers could advertise shift-on-the-fly.
In all my trucks since 1979, all with 205s, I have been able to shift-on-the-fly just fine as long as the hubs were turned.
Thanks. That looks pretty simple
I thought I ready somewhere here that the 271 / 273 tcases were too wide for square body frames?
Yeah they are massive, but sasquatch is a gmt400.
Talked with Jesse @Rugby_7 (I think) yesterday. Ill be going with the Magnum/205 triple stick setup. He is guessing the UA2500 has close to 50k miles on its Tcase setup. But thats not what sold me.
Having someone who can actually speak of the competitions qualities and failures accurately without trashing them was a big deal to me. Also having the person who picked up the phone, not who I wanted to talk to though(no offense), be able to answer tje questions. Thats a big deal for a guy like myself in the industry im in. I called the other places, emailed others, and the response is that the one guy who knows it isn't available. Thats not a very good selling point for someone who is going to put a major component through its paces. Ill probably catch up to the UA2500 mileage and abuse on this setup in about a 1 year period.
Again, thank you @Rugby_7 for your time and knowledge yesterday. Ill be talking to you again soon.
Having someone who can actually speak of the competitions qualities and failures accurately without trashing them was a big deal to me. Also having the person who picked up the phone, not who I wanted to talk to though(no offense), be able to answer tje questions. Thats a big deal for a guy like myself in the industry im in. I called the other places, emailed others, and the response is that the one guy who knows it isn't available. Thats not a very good selling point for someone who is going to put a major component through its paces. Ill probably catch up to the UA2500 mileage and abuse on this setup in about a 1 year period.
Again, thank you @Rugby_7 for your time and knowledge yesterday. Ill be talking to you again soon.
And that is why I do business with ORD 
