Datsun Transmissions

[rude_day]

Okay so first i would just like to tell you this is going to be a write up for EVERYONE so please fill free to add any information that will help any of our fellow Ratsuners.

 

 

 

 

Now for the pics:

 

 

 

 

 

 

 

 

From TOP to BOTTOM

 

1971 4 Speed 521        (Truck)

 

1984 5 Speed 720 4x4 (Truck)

 

1979 5 Speed 720        (Truck)

 

19?? 4 Speed 510         (Car)

 

 

 

 

 

 

 

1971 4 Speed 521        (Truck)

 

 

 

 

 

 

 

 

 

1984 5 Speed 720 4x4 (Truck)

 

 

 

 

 

 

 

 

 

 

1979 5 Speed 720        (Truck)

 

 

 

 

 

 

 

 

 

19?? 4 Speed 510         (Car)

 

 

 

 

 

 

 

 

 

[rude_day]

.

[ggzilla]

Great pics.

 

510s came with short 26" transmissions. If that came out of a 510 it would have been swapped in some time in the last 35+ years.

 

Since it has a bell housing, it might be a rare 240Z 5-speed (71A transmission).

[datzenmike]

Top to bottom...

 

F4W63 four speed, 521 specific because of the flange output. Also used without the flange on the earlier 521 and 520 with the J13 motor but with different bell housing bolt pattern to reflect this. The 510 wagon and the early 620 with L16 motor also used this exact transmission without the flange. The 2 and 4 door 510 sedans, 710 and A10 but with a closer ratio gear set. The 610 F4W63 is 31.5" long, all others are 26"

 

FS5W71B five speed 26" long and used only in the later 2 and 4 wd 720s with Z series engines at this length. Used in truck, Z  car and 810/Maxima car, this transmission is usually 31.5" long. First used in '77 620 and the 280Z and last used on the '86.5 720 truck and the S12. (won't have a speedometer drive if from a 4x4)

 

FS5W71B. Same as above but 31.5" long and with a L series bolt pattern.

 

F4W71A (US spec) from a 240z car. It's remotely possible that it's a non US F4C71A with Porsche servo steel synchros instead of brass. These are highly sought for racing if with the steel synchros. This transmission was originally used in the Fairlady Roadster and would have and the starter bump on the other side. A special L series removable bell housing was cast so it could be used on the newer 240Z car.

[rude_day]

Great pics.

 

510s came with short 26" transmissions. If that came out of a 510 it would have been swapped in some time in the last 35+ years.

 

Since it has a bell housing, it might be a rare 240Z 5-speed (71A transmission).

 wow very nice to know

the person that gave me the trans said it was from a 510 but thanks for clearing things up

[rude_day]

Top to bottom...

 

F4W63 four speed, 521 specific because of the flange output. Also used without the flange on the earlier 521 and 520 with the J13 motor but with different bell housing bolt pattern to reflect this. The 510 wagon and the early 620 with L16 motor also used this exact transmission without the flange. The 2 and 4 door 510 sedans, 710 and A10 but with a closer ratio gear set. The 610 F4W63 is 31.5" long, all others are 26"

 

FS5W71B five speed 26" long and used only in the later 2 and 4 wd 720s with Z series engines at this length. Used in truck, Z car and 810/Maxima car, this transmission is usually 31.5" long. First used in '77 620 and the 280Z and last used on the '86.5 720 truck and the S12. (won't have a speedometer drive if from a 4x4)

 

FS5W71B. Same as above but 31.5" long and with a L series bolt pattern.

 

F4W71A (US spec) from a 240z car. It's remotely possible that it's a non US F4C71A with Porsche servo steel synchros instead of brass. These are highly sought for racing if with the steel synchros. This transmission was originally used in the Fairlady Roadster and would have and the starter bump on the other side. A special L series removable bell housing was cast so it could be used on the newer 240Z car.

thanks as well for all the info very helpful

[rude_day]

In BOLD

Top to bottom...

 

F4W63 four speed, 521 specific because of the flange output. Also used without the flange on the earlier 521 and 520 with the J13 motor but with different bell housing bolt pattern to reflect this. The 510 wagon and the early 620 with L16 motor also used this exact transmission without the flange. The 2 and 4 door 510 sedans, 710 and A10 but with a closer ratio gear set. The 610 F4W63 is 31.5" long, all others are 26"

 

FS5W71B five speed 26" long and used only in the later 2 and 4 wd 720s with Z series engines at this length. Used in truck, Z  car and 810/Maxima car, this transmission is usually 31.5" long. First used in '77 620 and the 280Z and last used on the '86.5 720 truck and the S12. (won't have a speedometer drive if from a 4x4)

 

FS5W71B. Same as above but 31.5" long and with a L series bolt pattern.

 

F4W71A (US spec) from a 240z car. It's remotely possible that it's a non US F4C71A with Porsche servo steel synchros instead of brass. These are highly sought for racing if with the steel synchros. This transmission was originally used in the Fairlady Roadster and would have and the starter bump on the other side. A special L series removable bell housing was cast so it could be used on the newer 240Z car.

 

its right there to your left

 

 

[datzenmike]

Ha ha yup it's there. So it must be a 2wd 5 speed.

[rude_day]

Ha ha yup it's there. So it must be a 2wd 5 speed.

well the guy that i got it from was a 4x4 cause his truck was pretty much stock just different wheels

[wayno]

Well now, what you have is the possible makings for a truck shortshaft 5 speed for your 521, it depends on if the front L case(pre 1980) will work with that shortshaft 5 speed gearset.

http://community.ratsun.net/topic/28473-how-to-put-together-a-shortshaft-5-speed-for-a-l20b/

[flatcat19]

A for effort and enthusiasm.

[datzenmike]

And the truck is at least 30 years old now. Could easily have had a failed transmission in the last 15 to 20 years. The 2wd will work just fine in a 4x4 but a 4x4 transmission won't drive the speedometer if used in a 2wd truck. Here's my shorty 4x4 720 5 speed. You can see than Nissan didn't waste time and money for a speedometer on the transmissions when the speedometer is driven from the transfer case.

 

[uberkevin]

So I'm in need of a front case for my short 720 tranny..

 

Will the 4 speed 620 front case work?

It looks as if it would.

I've got a 75 620, you all know with l20b with said four speed. And there is a few 620s to work from around me.

There is also some Z cars but all are auto. The auto front case won't work right?

 

I just need an L front case...

[datzenmike]

The 4 speed front case from a 620 will work, BUT..

 

The four speed case has a 56mm hole to support the 56mm counter bearing. The shorty has a larger 62mm counter bearing. It needs to be removed and a smaller 56mm bearing put on it.to fit the new case. I suppose you could have a machine shop mill the hole out to 62mm too.

 

Bottom bearing hole is a smaller 56mm so there is more space between holes.

 

Bottom hole is the larger 62mm so it's much thinner between holes.

 

 

Besides the larger counter bearing the 5 speeds after '85 may or may not have a larger diameter first/second shift rod. Check for this.The very front of the case supports the end of all three shift rods. The 4 speed case will have a 14mm hole but it can be drilled out to 16mm to fit the shorty's larger 1st/2ng shift rod. Well if it has it.

 

This is an '85 5 speed for another application. Note that the top 1st/2nd shift rod is slightly larger.

[uberkevin]

Damn so finding a L front case would just be better, easier then that..

Yes its doable..

 

Stupid front cases.

Thanks mike that's so great info!! If I can't find an L front case then I guess I'll do this.

[wayno]

Damn so finding a L front case would just be better, easier then that..

Yes its doable..

 

Stupid front cases.

Thanks mike that's so great info!! If I can't find an L front case then I guess I'll do this.

You are going to have to remove the larger late bearing anyway, that is not avoidable unless you have the case turned out to the larger bearing size.

It's the shift rods that I am unsure about in the earlier 620 5 speed cases, I know that someone put a 620 5 speed gearset on my Australian SD22 engine I had imported, I suspect it is a later 5 speed case from the early 80s, but I don't know that, they started making the SD series engines back in the 60s, I don't know what transmission bolt pattern they had back then, or what transmission they used for that matter.

Just take the front bearing cover off your 620 5 speed and look at what size the shift rods are, if they are all the same size, you are likely good to go.

You can not use an early 4 speed case that has the lower inspection cover, that is a totally different transmission, but there are some late 4 speeds that were used in the 720 that will work, I have used them a couple times now, they have this plate just in front of the shift lever with 6 bolts.

There is some talk about the reverse switch location on these cases, but I don't use reverse lights, so that is not an issue for me.

Here is a link to the article I wrote on how to put together a shortshaft 5 speed, it describes how to remove the lower bearing, take my word for this when I say to buy a new high quality lower cluster gear bearing, this is the weak point in these transmissions, you don't want to have to remove the transmission and replace this bearing after you put your transmission together and install it in the truck, just spend the money for a GOOD bearing, and I am not talking about the bearing you can buy at the auto parts store.

Here is the link to the article I wrote.

http://community.ratsun.net/topic/28473-how-to-put-together-a-shortshaft-5-speed-for-a-l20b/

[datzenmike]

Yes there are two locations for the reverse lamp switch. I have never seen the one about an inch behind the other. All 4 and 5 speeds I have seen are the forward type.... and again you can run just as well without it.

 

Oh and the 3N71B auto is totally different. The bell is removable where the 4 and 5 speeds 'bell' in integral with the front case.

[flatcat19]

So, to keep it clear for Kevin...

 

Remove big bearing from late 71B.

Remove bearing from 4 speed.

 

Press 4 speed bearing onto 71B.

Bore one hole out for shift rods on 4 speed case.

 

Right? If that's it-easy.

[wayno]

So, to keep it clear for Kevin...

 

Remove big bearing from late 71B.

Remove bearing from 4 speed.

 

Press 4 speed bearing onto 71B.

Bore one hole out for shift rods on 4 speed case.

 

Right? If that's it-easy.

To say that, I would have to see the 4 speed case you are going to use, I can say if it is a longshaft 720 4 speed, it is likely that easy, you might not even have to bore the hole for the shift rod, it depends on the case, if it is a shortshaft 4 speed, no it will not work, as it is the wrong type of 4 speed, if it is that 3rd transmission down in the photo that was posted, yes it might be that easy, like I said I would have to see it to know, personally I have never drilled a case for the shift rod, I always use 1980 4 or 5 speed cases.

There is a 1980 720 in the wrecking yards around here right now with the case you need, unless it has been converted to a napZ engine.

http://portland.craigslist.org/wsc/ptd/4427486902.html

[flatcat19]

Its a 4 speed from a 620.

And probably a long one too.

 

Kevin,post picture.

[uberkevin]

I'll post pictures of the napz 5 speed I have.

 

I'll also post pictures of the 620 4 speed I have.

However the 620 4 speed need to to go back in the 620 it belongs in. So using the front case isn't a choice.

 

But there are more 620s in the yards around me.

Wayno, I'd pay you to grab and ship that front case for me.. Ha ha.

I know there isn't any early 720s with l20b around me however I don't know about the other yards a few others maybe an hour an more away.. So the chances might be sleem. Idk.

Flatcat what's the name of the others then bigtoe around hereesh.

[datzenmike]

All L16 620s had the different 4 speed. The '74 L18 and all later L20Bs had the 4 or 5 speed 71B type transmissions who's front case can be made to work on the late Z series 71B. Yes by all means replace with a new counter bearing.

 

This has been done before. Here is a late 720 shorty with an L front case on it. (looks like a 510 cross member?)

 

[flatcat19]

I'm sure we can find a late 620 4 speed for you, Kevin.

 

And you know I'll help swap the case when we find it.

[uberkevin]

I think we can to! Or just talk Ron into using the 4x4 5speed I have. With his big ass sand tires and Detroit locker in that thing should be boss!

 

 

 

When he gets his l20b back..

[uberkevin]

I said I'd post picture..

 

My 720 napz 5 speed Short transmission..

 

 

And the one picture I grabbed of the 75 620 4speed transmission..  that i cant use..