sd22 in a 1948 Willys Truck.

#76

The motor and its future home

Didn't have much time or energy to play with the SE23, but couldn't help but unwrap it and get a looksee:

As a bonus, the 720 transmission to transfer case shorty driveshaft fits.

#77

But-the question I have, is what transmission is this? I didn't see any numbers (only had five minutes of daylight), nor do I know what vehicle it came out of. All JDM could say is that it was a 4 speed auto....I've never owned a (Nissan) auto tranny and know very little about them, but why does it look like there is a slave cylinder?

#78

elminero67 wrote:"new" motor arrived today!

That was fast!

#79

Maybe it has a traditional flywheel in there, take the tranny off and get a look at it.
Maybe it is like one of them VW bug transmissions, it had a flywheel, but you didn't need to use the clutch to shift, as it was an auto 4 speed.
If it is one of them, and your not going to use it, I might be interested in it if you want to sell it, I would need to know a little more about it, but separate them and see what it has for a flywheel.

#80

Does not look like any auto trans I have ever seen but that don't mean much.
Don't see a pan on it to drain all that auto trans fluid out.
And your right. What's with the clutch slave.
Don't see no cooler lines on it either.
Interesting.
Take more pics later of fuel pump etc etc.

Do we know what this was in ?

Almost looks like it was in a piece of equipment, loader or something and the trans is a manual forward and backwards type of thing. Like a forklift or something.

Maybe.

#81

This is what the rear case of a 1980ish 4 speed transmission looks like, yours sorta looks like this, but the lever on the side is different.

This is a complete 4 speed out of the same era with an L block front case.

Yours has 2 separate levers, one on the side, and one on the top, my 4 speed case has all the moldings for the lever placements, but they are not being used.

#82

If it looks like a duck and quacks like a duck, it must be a duck. Now that it is daylight, it is clear that it is not an auto tranny that JDM said would come attached to the SD23 (and that was in their photo). So I think that Waynosworld is right (thanks for the pics), it is likely a variation of the 4 speed with a column shift or something funky.

I'm not complaining! this should make the swap easier. Now I need to look to see if I can swap the five speed transmission (foreground, with a Z24 bellhousing) to the bellhousing from the four speed? They look like the same bolt pattern.

#83

I believe there is a topic on here some place that tells you exactly how to do that. Someone has done it. Just cant remember who it was.
Now you don't have to find a flywheel. I think I have a part number for a clutch kit here some place as well. Disc and pressure plate.

#84

Now that I have something to go on, looks like it may be a variation of the F4W71C. A quick search indicates that the F4W71C came in some SD23 equipped D21 pickups.
Here are a couple more pics of the SD23:

#85

Why don't you just use the 5 speed you now have behind your SD22, it should bolt right on to your SD23.
You also can take the housing on you SD22 transmission and put it on the Z24 transmission in the photo, but you will need to change to the small bearing in your diesel case, as the Z24 trannys had the bigger bearing.
First you need to remove that transmission and look at the flywheel, that needs to be done first, before any more plans are made, you never know what might be in there, if they said it was an automatic, it's likely some kind of automatic, don't pull the auto trans. apart unless you have to.
I wrote an article on how to pull these transmissions apart, the article was about how to make a shortshaft transmission for a 521, but it all is the same on pulling them apart and putting them back together, mostly it's just photos.
Here is a link, you should be able to read the article without joining the forum.
http://www.nwdatsuns.com/viewtopic.php?f=35&t=72

#86

That's a great write up you did. Answers several questions.
I'm trying to avoid using the 5-speed that is currently attached to the (1982) SD22 as it has a suspicious vibration in 3rd gear, and about three weeks ago started dumping gear oil on my driveway. I'll take a looksee at it when pull it out and see if it is something simple, but I just don't trust it.
The 5-speed in the foreground pics is the 4x4 version out of a 1984 with lower miles.
My ulterior motive is to keep a complete spare motor/transmission, so i'm trying to piece together the leftovers.

I'm starting to think there may be more compatible variations of Nissan transmissions than you'd suspect, just not enough Nissan gearheads out there.

#87

elminero67 wrote:That's a great write up you did. Answers several questions.
I'm trying to avoid using the 5-speed that is currently attached to the (1982) SD22 as it has a suspicious vibration in 3rd gear, and about three weeks ago started dumping gear oil on my driveway. I'll take a looksee at it when pull it out and see if it is something simple, but I just don't trust it.
The 5-speed in the foreground pics is the 4x4 version out of a 1984 with lower miles.
My ulterior motive is to keep a complete spare motor/transmission, so i'm trying to piece together the leftovers.

I'm starting to think there may be more compatible variations of Nissan transmissions than you'd suspect, just not enough Nissan gearheads out there.

You are correct, there are lots of transmissions you can connect to your diesel engine, but the most important part is that diesel front case, you really need that diesel front case, everyone wants them, diesel guys want them, roadster guys want them, as with your diesel case, a datsun SPL/SRL roadster guy can bolt a Z car transmission to his R16/U20 engine, and get away from the expensive roadster transmissions.
Was your transmission puking out oil from the bellhousing, or the tail shaft?
It is important to tell me this, and you need to stop even starting the engine if the oil is coming from the bellhousing, as it is likely that the front lower clustergear bearing has destroyed itself, but the case can likely be saved, do not throw that front case away, unfortunately the front steel bearing cover might be toast.
As for the auto transmission, if it really is a auto transmission inside, it's not likely you will be able to use that case, it will be different inside.
I have been building these transmissions for several years now, from the article you can see that you can build a shortshaft transmission for a 521, well you can build a shortshaft transmission for your Jeep also, it's all about that front case, but before you build anything, you need to remove that auto transmission from the SD23 engine, and see what the flywheel looks like, take a photo of it, if it really is a standard flywheel, measure the clutch disc across, how many MM is it, 200/225/240?
Knowing how big the clutch disc is is very important, if it is 200mm or 240mm then you are going to have to find the proper throw out bearing collar, otherwise when you put it back together, you will have to take it back out again.
I wish you were closer, I would really like to see this auto transmission in person, I will post a photo of it on Ratsun and see if Dmike knows/has ever seen one before.

#88

Ok, so this is the response I got about your tranny, the guy seems to think that it is a 3 speed on the tree(column) with a 4th gear that is an automatic overdrive.
Here is a link to the thread I started asking about it, and what kind of transmission it might be.
http://community.ratsun.net/topic/59464 ... tion-help/
I will repeat, do not throw away your diesel case/transmission behind your SD22, hopefully it did not hurt the case.
There is a good chance that the front case on that transmission will fit your Z24 transmission also.
The 84 transmission also has a big bearing, maybe the case on that column shift is also a big bearing, if not, you will have to use the small bearing, that is likely the issue with your other tranny, that lower bearing is the weak spot on them transmissions, so they went to the bigger bearing.

#89

waynosworld

I see you know datzenmike. Good. I have been thinking of him while reading this.
He has a great transmission write-up.

elminero67

I will link the transmission write-up when I relocate it. (Be back soon.)

Manual Transmission Related

http://720world.com/forum/topics/how-to ... nt%3A70991

http://720world.com/forum/topics/84-4x4 ... on-rebuild

http://720world.com/forum/topics/transm ... 1#comments

http://720world.com/forum/topics/fs5w71 ... ission-faq

#90

Thanks again for the post and support. I'm still absorbing all of the info, as I struggle to learn stuff by reading...bear with me, I'm trying

Waynosworld, As I mentioned, I struggle learning stuff reading it, If I'm understanding you correctly, the wire to the IP is a shutoff that needs to be live in order to work, and ceases to work when there is no juice?

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sd22 in a 1948 Willys Truck.

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