Running a divorced transfercase

[401-J10]

So i currently have the t400 and a quadratac. I've got a divorced transfercase that i'm wanting to use so i was wondering what it would take to convert the transmission to a 2wd setup with a 1410 yoke so i could use the divorced transfer case. I know i'll have to totally tear down the transmission, but i'm just wondering about specific parts and if there is anything needed that will be hard to find.

Thanks:)

[DAHoyle]

I may have what you need.

For the most part, you only need the tailshaft, the yoke, and the tailshaft housing. I have all those parts from behind a 4BT Cummins. Not sure what the yoke is tho. Will not be using any of it, as mine is married to a 203 doubler, then a 205. Not sure when I could get them to you tho, as I am working out of state for awhile.

Don't really need any money for them, but enough for a 6 pak would be nice.

Doug

[lasinvegas]

I'm dropping my divorced 205 behind my twin sticked dana 300

[401-J10]

I may have what you need.

For the most part, you only need the tailshaft, the yoke, and the tailshaft housing. I have all those parts from behind a 4BT Cummins. Not sure what the yoke is tho. Will not be using any of it, as mine is married to a 203 doubler, then a 205. Not sure when I could get them to you tho, as I am working out of state for awhile.

Don't really need any money for them, but enough for a 6 pak would be nice.

Doug

Well thanks, just let me know. I may hit you up with a pm too. I'm trying to decide between a 2wd transmission with a divorced transfer case or just keeping the married transfercase and hooking the divorced transfer case up to that. I'm just worried about the quadratac possibly being a weak link, cause the other transfer case and the axles are 2 1/2 ton.

[Slick Willie]

The output of the second tcase will see more torque than the first. Divorced #1 case or mounted #1 case will both see the same torque from the tranny. FWIW

[401-J10]

The output of the second tcase will see more torque than the first. Divorced #1 case or mounted #1 case will both see the same torque from the tranny. FWIW

I'm not sure if i understand what you're saying. My plans are to either leave the quadratac (e-locked of course) then a divorced transfer case behind that or just make my transmission 2wd and use the divorced transfercase. See i have to use the second transfercase because it matches the axles in the direction it spins. A regular transfercase wouldn't work.

[DAHoyle]

I'm not sure where you're getting your info, but it is wrong. A divorced t-case and a married spin the same direction. Putting them together wil not change that. I'm not sure what you are trying to accomplish, but you might want to lay it all out on the table here and get some ideas from folks who have been there.

[Slick Willie]

I'm not sure if i understand what you're saying. My plans are to either leave the quadratac (e-locked of course) then a divorced transfer case behind that or just make my transmission 2wd and use the divorced transfercase. See i have to use the second transfercase because it matches the axles in the direction it spins. A regular transfercase wouldn't work.

Yeah, any tcase will spin the same direction (well, in America), divorced or hard mounted. What I was saying is that the first tcase after the tranny will see the same amount of torque from the motor whether it's hard mounted or divorced. So if it's divorced, 1410's may be overkill for the front tcase. Now the second tcase (divorced only) will see a gear reduction and thus more power from the engine, so the yokes and Ujoints on it would need to be strong.

What are you wanting to run double tcases for anyway?

[401-J10]

I'm not sure where you're getting your info, but it is wrong. A divorced t-case and a married spin the same direction. Putting them together wil not change that. I'm not sure what you are trying to accomplish, but you might want to lay it all out on the table here and get some ideas from folks who have been there.

Actually, my info isn't wrong. I know what i'm doing. I'm not talking about the whole transfercase spinning a different direction. Basically i've got some older 2 1/2 axles and the front axle spins the opposite direction of a normal front axle. If i tried just using the quadratac when trying to go forward the front axle would try going backwards and rear axle would try going forwards. So i have to use the transfercase that i got with the axles to make the front axle work and its a divorced transfercase. So basically i figure i can use the rear output of my existing tranfercase or make my transmission 2wd. And the only reason i was hoping to use 1410s was because i have a bunch of 1410 joints and yokes already.

And i really don't appreciate your response. Its kinda rude to jump on somebody and tell them they have no clue what they're talking about just because you didn't understand. I basically got some 2 1/2 axles for real cheap and i'm trying to make them work. It may not end up being the most capable rig but it will work.

[uglyjeep]

Are they GMC 2 1/2 ton axles? From what I have heard, you can flip the third member on these axles to get normal rotation. Just a thought.

[401-J10]

Are they GMC 2 1/2 ton axles? From what I have heard, you can flip the third member on these axles to get normal rotation. Just a thought.

Yeah thats what they are. And you can flip the third member but there are some modifications you have to do. From what i've heard the shafts don't fit after flipping it so you have to cut one shaft and spline it and the other doesn't engage all the way. So i feel like it would weaken the axle. But thanks for the idea.

[DAHoyle]

Actually, my info isn't wrong. I know what i'm doing. I'm not talking about the whole transfercase spinning a different direction. Basically i've got some older 2 1/2 axles and the front axle spins the opposite direction of a normal front axle. If i tried just using the quadratac when trying to go forward the front axle would try going backwards and rear axle would try going forwards. So i have to use the transfercase that i got with the axles to make the front axle work and its a divorced transfercase. So basically i figure i can use the rear output of my existing tranfercase or make my transmission 2wd. And the only reason i was hoping to use 1410s was because i have a bunch of 1410 joints and yokes already.

And i really don't appreciate your response. Its kinda rude to jump on somebody and tell them they have no clue what they're talking about just because you didn't understand. I basically got some 2 1/2 axles for real cheap and i'm trying to make them work. It may not end up being the most capable rig but it will work.

Who, there buddy. Ease up.

First. If you ask a question, then you need to include all the information you can about what you are trying to do, so that people can have some idea what you are trying to accomplish. You have an odball combination there, and if you are trying to use the t-case that came with those axles, then yes, obviously it will work. If you tried it with any readily available transfer case in the made in the good ol USA, then you would be out to lunch.

Perhaps a little better communication on each of our parts would have been helpful, but I am quite sure that everyone else who read this post had the same response come to his mind that I did, and even after the miscommunication, you did not bother to identify the parts you were working with.

In any case, maybe you should ease up just a bit, since everyone who responded to your post offered to help, and some, (myself) even offered to provide you the parts you were asking about , free of charge.

That's as close to an appology as you are going to get on this, and whether or not you appreciate my response is irrelevant to me. I answered your question to the best of my ability with the info provided, and asked for clarrification, and I didn't do any of it for my benefit, but for yours.

Hope you get it all worked out.

Doug

[uglyjeep]

From what i've heard the shafts don't fit after flipping it so you have to cut one shaft and spline it and the other doesn't engage all the way.
That wouldn't be to good.

Do you have any pics? I've never seen the GMC 2.5 ton axles (probably, the same with most others here).

[401-J10]

Who, there buddy. Ease up.

First. If you ask a question, then you need to include all the information you can about what you are trying to do, so that people can have some idea what you are trying to accomplish. You have an odball combination there, and if you are trying to use the t-case that came with those axles, then yes, obviously it will work. If you tried it with any readily available transfer case in the made in the good ol USA, then you would be out to lunch.

Perhaps a little better communication on each of our parts would have been helpful, but I am quite sure that everyone else who read this post had the same response come to his mind that I did, and even after the miscommunication, you did not bother to identify the parts you were working with.

In any case, maybe you should ease up just a bit, since everyone who responded to your post offered to help, and some, (myself) even offered to provide you the parts you were asking about , free of charge.

That's as close to an appology as you are going to get on this, and whether or not you appreciate my response is irrelevant to me. I answered your question to the best of my ability with the info provided, and asked for clarrification, and I didn't do any of it for my benefit, but for yours.

Hope you get it all worked out.

Doug

Well, the reason i didn't really explain what i was doing was because this thread was more just for converting a 4wd t400 to 2wd. So i didn't really feel like it was necessary. Secondly, not many people are familiar with the parts i am using so its kind of hard to explain.

Hopefully you can kind of understand where i was coming from in the last post. Yes everyone was trying to be very helpful, which is much appreciated, but after your post i felt like the assumption was made that i had no clue what i was doing. And thats kind of a bad position to be in. I've been on here for a few years and when i don't know what I'm doing I'll admit it or research it.

So i will apologize for snapping back when everyone was just trying to help. But it just kind of sucks when everybody thinks you're an idiot. Please let me know if you would still be interested in sending those parts. I'll happily pay for them. And if anybody is interested in what i'm doing i'll be happy to start a thread. Sorry for the long post.

[jeepsr4ever]

If they are toploaders they are rockwells not GMC and you dont need to run any kind of reverse Tcase you just spin the center chunk 180 if it needs to be drivers side drop. If they are true GM axles then yes they both run in reverse (and arent that strong). As far as 2wd to divorce tcase why not find a 205-th400 adaptor. You will end up changing the main shaft in the th400 or be stuck with the corse 10 spline output to which I dont know if their are much in the way of larger ujoint sized yokes for the 10 spline shaft.

[401-J10]

If they are toploaders they are rockwells not GMC and you dont need to run any kind of reverse Tcase you just spin the center chunk 180 if it needs to be drivers side drop. If they are true GM axles then yes they both run in reverse (and arent that strong). As far as 2wd to divorce tcase why not find a 205-th400 adaptor. You will end up changing the main shaft in the th400 or be stuck with the corse 10 spline output to which I dont know if their are much in the way of larger ujoint sized yokes for the 10 spline shaft.

Well they are definitely GMC axles. They were out of a M211. And believe me i wish i had some rockwells. But since i have these axles i'm gonna try using them. Please explain the 205-th400 adapter further. You're not suggesting to run a 205 are you? I mean what can i do with the adapter? And are you saying that if i convert to 2wd that the only shaft i can use is just a 10 spline?

As far as axle strength i have heard the gmc axles aren't that strong. Looking at them though i can't see why. I guess its a axle shaft issue? I figured i'd try them and see what happens. If i easily break something i figure i'll look into any possible modifications or upgrades. I was wondering if anyone looked into putting rockwell shafts into these axles. Although i do realize that there is hardly any support.

Thanks a bunch

[jeepsr4ever]

First lets figure out what transfer case you plan on running. To make the TH400 from a quad work you will need to:

1. Change the 10 spline main shaft out
2. Buy a 2wd tailshaft
3. Bolt on a yoke :D

I wasnt sure what T-case you wanted to run. I believe the Rockwell T-case runs the outputs in the opposite direction. Do you have the T-case that came from the truck?

[401-J10]

First lets figure out what transfer case you plan on running. To make the TH400 from a quad work you will need to:

1. Change the 10 spline main shaft out
2. Buy a 2wd tailshaft
3. Bolt on a yoke :D

I wasnt sure what T-case you wanted to run. I believe the Rockwell T-case runs the outputs in the opposite direction. Do you have the T-case that came from the truck?

I have a t-case from a similar truck that had the same axles as i have. I don't think its a rockwell t-case. As i understand on the transfercase i have the front output spins in the opposite direction but the rear spins normally. It is a divorced transfercase.

So are you saying the shaft currently in my TH400 is only 10 spline? I thought it was like 30 of 32 spline.

[jeepsr4ever]

Thats right Evan the Quadratrack TH400's had a course 10 spline output shaft. It is possible to use this shaft but your limited in ujoint size. Dana 20's from 1967-1973 had 10 spline outputs and if you need a yoke let me know I will send you one for shipping costs.

[rustywagoneers_com]

A little info on the GMC 2-1/2 axles.

http://www.pirate4x4.com/forum/showthread.php?t=42094

http://www.pirate4x4.com/forum/showthread.php?t=96340

http://www.pirate4x4.com/forum/showthread.php?t=293399

There is better info, I just haven't gotten the search right yet....

peace
Dave

[jeepsr4ever]

One of the downsides of this swap without changing the tailshaft is that you would have to run the LONG tailshaft which could make the rear driveshaft shorter. How much...I do not know.

[401-J10]

A little info on the GMC 2-1/2 axles.

http://www.pirate4x4.com/forum/showthread.php?t=42094

http://www.pirate4x4.com/forum/showthread.php?t=96340

http://www.pirate4x4.com/forum/showthread.php?t=293399

There is better info, I just haven't gotten the search right yet....

peace
Dave

Hey thanks alot for looking those up. I had read some of that stuff but had kind of forgotten about it. I kind of rarely get on pirate.

[401-J10]

One of the downsides of this swap without changing the tailshaft is that you would have to run the LONG tailshaft which could make the rear driveshaft shorter. How much...I do not know.

Well I appreciate your previous offer. First of all my TH400 needs to be rebuilt so swapping out shafts really isn't an issue. Its slipping really badly in first and second and won't even go in drive. The fluid is good and full.

So i guess what i really want is the parts needed to convert it to 2wd with a 1410 yoke if i can get it. I'm assuming the shaft i'm wanting is a 32 spline? The reason for the 1410 yoke is i have the original shaft that was in front of the military transfer case and its 1410 so it would just be the easiest way to hook it up. If you have any sources for these parts please let me know.

Thanks for all your input

[rustywagoneers_com]

a little more on the GMC /Eatons.

http://www.pirate4x4.com/forum/showthread.php?t=632652&highlight=rockwell+info