You could, but I wouldn't unless it was leaking, or making unhealthy noises. Dana 20 t-cases are very common, so I don't think finding parts would be a problem. If I wanted to learn more about t-cases I think I'd find an extra one to practice on. That's why I still have my old Dana 30 sitting next to my garage - gonna take it all down and put it back together (plus the hubs are good spares for my Scout axle). /wwwthreads_images/icons/smile.gif

Joel F.
Marquette, Michigan
Project No-Bucks
http://home.off-road.com/~nobucks/
'68 Jeepster Commando
225 V6/SM420/NP205/Dana44's

'79 Scout Traveler

 

That small project can easily turn into a big project when you separate the transfer case from the tranny. If the tranny rear bearing comes out with the transfer case, you'll drop needle bearings in the tranny. Then you'll have to take the tranny all the way down to get it back together.
It's not really a terrible thing, just time consuming - if you know how to do it. A real horror for the neophyte.

I'd find something else to keep me busy, like clean something.


98% is Understanding it
"Don't Fix Unless Broke"

 

Actualy they just slide apart, no bearings involved. Unbolt and slide them apart easy as 1 2 3. Rrich, how could the bearings fall in the tranny? Do you mean the output shaft coming out with the t-case? That could not happen, just on a smal hole D18 where the input gear has to be taken out before they can be seperated, if you had the top of the tranny and did not know about the input gear the output shaft comes right out with the t-case. Been there, done that. They are supposed to be pretty simple to rebuild, but hey, if it has been workng well I would not touch it. You might want to pull off the oil pan and PTO covers and clean it out inside there while checking the bearing under the PTO cover while you are at it. That will get all the junk out of there and give you a chance to seal up everything real good. What did you decide for a tranny/ axle gear ratio? Might be the time to re-consider lower t-case gears if you want a good functioning street/trail jeep and a project.

John
70 Jeepster with "Hurc package"
48 CJ-2A 225 V-6, SM465, D18, D44's, SOA on CJ springs, 35's, SHORT driveshaft /wwwthreads_images/icons/smile.gif
89 Wrangler 4 banger
98 Tacoma EC 6 cyl

 

Go ahead Hurc, give that output shaft a yank. It will pull the bearing retainer and the rear bearing back, doesn't take much. The mainshaft will move slightly, the needle bearings inside the input gear will turn sideways. Now it will never go back together, even with the world's biggest BFH. I suppose you could shake them out and toss them away?
To put it all back together you have to drop the cluster, take everything out, and restack it all. Probably over 125 needle bearing that go back in, in exactly the right order with the retainers in place.
Sometimes you get away with separating the two, sometimes you get problems.
Do you have any idea how much the mainshaft end-play is? Do you know what it is and how to measure it? Why would it change since you only took it all apart? What do you do if it's a little too much? What is the result?
What is the procedure for setting the end-plays on the front output shaft on the transfer case?

Why would you want someone to make the mistake?

See those big gears? How do you think they got in there?



98% is Understanding it
"Don't Fix Unless Broke"

 

Thats funny, I dropped Hurc's t-case last night, unbolted it and dropped it, no needle bearings any where. I am messing with the twinstick shifter idea. Must be my imagination that the tranny is intact...... Also, I noticed on the T-90 that the output would not come out if the top of the tranny was on, only when I took off the top would it come out. The shift forks hold the gears and therefore hold in the shaft right? I am not shure about the t-14, but mine dropped right out, no problemo. Big gears get in where, the t-case or the tranny? Endplay? The t-case has shims that you can adjust it with, you pull the bearing retainer and add or subtract shims to adjust it, pretty simple. The tranny I am not shure about, but as long as the thing is not coming apart I guess I will not have to worry about it right? He has the body off, the thing does not even have axles sitting under the frame, so it is most likley already out with no problems also.

John
70 Jeepster with "Hurc package"
48 CJ-2A 225 V-6, SM465, D18, D44's, SOA on CJ springs, 35's, SHORT driveshaft /wwwthreads_images/icons/smile.gif
89 Wrangler 4 banger
98 Tacoma EC 6 cyl

 

Grab hold of the stub shaft sticking out the back of the transmission, yank hard. Ity works on either your T-90 or T-14, whether or not the top is on. Hear the tinkle tinkle? That's the front bearings dropping - called pilot bearings - not related to clutch pilot.

The big gears I referred to are those in the transmission. They get installed through a big hole in the back, then a retainer is slid in place, the bearing goes in that.

When you separate the tranny ftom the transfer case it's anybody's guess which side the bearing will stick to, the tranny or the transfer case. If it goes with the case you just screwed up. If you are lucky the gasket helps hold it in the tranny, but it's 50/50.

No needle bearings in the transfer case? See the big gear in the middle? - called the intermediate gear. See the shaft retainer on the end - outside? Pull off the bolt, push the shaft through the case toward the front, you'll see what needle bearings are. That alone will give you just a taste at what you do to get the trans back together, just a taste. It will keep you out of mischief for awhile.

T-14, T-15, T-90, T-86, T-84, Fords, Chevys, Muncie M-21, Muncie M-22, Saginaw's, Borgs, etc all have similar back ends. D-20, D-18, transfer cases are quite similar to each other.

You might try buying a manual that shows how things are put together, even an exploded view drawing would help.


98% is Understanding it
"Don't Fix Unless Broke"

 

I guess I got lucky then. My T-90 took a lot of effort to get that shaft to move, it might have just been old, when I found it 8 years ago the top was off the tranny and filled with water. Well, I guess I got on the right side of the 50/50 then on Hurc, no tinkle tinkle there either. I will take your word for it.

John
70 Jeepster with "Hurc package"
48 CJ-2A 225 V-6, SM465, D18, D44's, SOA on CJ springs, 35's, SHORT driveshaft /wwwthreads_images/icons/smile.gif
89 Wrangler 4 banger
98 Tacoma EC 6 cyl

 

You mean you've had it since you were 9 years old?

98% is Understanding it
"Don't Fix Unless Broke"

 

Yea 10 years old really, my uncle is big into the early Jeeps, he has 2 sitting in his driveway, 2 more in his garage, and the new cars stay outside. /wwwthreads_images/icons/smile.gif The wife would not let him take another home, so it came to my house. It was bright orange with blue fenderwells (I have pics, broncos?) and did not work at all. Mom hated it, so I painted it camo with a roller brush (see, hurc was not the first) and I just sat in it alot, it was my first Jeep. Mom really hated it when it did work without a muffler and dripping oil where ever it went, so it went to a field in Denver owned by my Uncle. This year I was able to snatch it back. I have had it for a long time, I have found about 7 colors of paint on it, a bit of bondo, and lots of stuff you wonder about why people did. The front clip was welded to the tub, go figure. I like the old Jeeps, plenty of good memories in that one.

John
70 Jeepster with "Hurc package"
48 CJ-2A 225 V-6, SM465, D18, D44's, SOA on CJ springs, 35's, SHORT driveshaft /wwwthreads_images/icons/smile.gif
89 Wrangler 4 banger
98 Tacoma EC 6 cyl

 

To the top.

RRich, these concerns are just for a manual transmission right?

Thanks,

Paul

 

Rich is correct, one can cause the shaft to pull out and ta da needle bearings all over da place.

AJC founder and president

 

Jim,

Even on a Turbo-400? If I removed the T-case and the output shaft seems to have stayed in place do I have any need for concern?

Thanks,

Paul

 

psaam,
I just put a tera low kit in my dana 20 with the th400, I took the entire adapter off with the t-case and didnt have any problems, the adapter with your input gear attached simply slides off the trans shaft. As for rebuilding the case, I have done two and I have not encountered too many problems

She Thinks My Jeepster's Sexy!
70 in Boone, NC

 

I think I may be doing the Tera low kit also. Did you encounter any difficulties in that? What was the cost? I'm pulling the Trans and T case this comming weekend, I got my SM 420 ready, thought I might as well do that at the same time.

Tom
69 Jeepster
89 Suburban 4wd
00 Expedition 4wd

 

The automatic may be different. I have never dealt with one yet.

AJC founder and president

 

cliffhanger,
I just got the tera in this morning, at first, it would shift into every gear except 2 high, then after some playing around, it seems to be doing ok although I havnt went over about 35 mile per hour. It isnt too difficult, I got a real good deal on one but I think they go for around 800 plus b/t 50-75 for bearings. e-mail me and I might can put you in touch with a guy that get you one for around 650.

She Thinks My Jeepster's Sexy!
70 in Boone, NC

 

Change the T Case gear oil fairly quick after the conversion. Lots of metal. I submitted a couple of posts last year after having done mine. I was going to do a full writeup with pics but, no one seemed interested in the Tera Low at that time. I really like it. Have used it on 2-3 trips last Fall. Verry Sweet!

Joe
'67 Jeepster Convertible - Deluxe Edition
'67 M614 military trailer - camo edition
'67 BMW R50- It ain't a 4x4, but it is just as sweet