1971 PL521

[Rocket Dog]

I'm pretty sure that's a dizzy-dog-leg-upper-kingpin short leg model 5262720 series transmission. 

 

Yesireebob.

[wayno]

It looks like a 620 transmission to me, it has them gussets on the sides holding the two halves together.

It is a longshaft that looks to be a 5 speed and is pre 1980 I believe.

See the rib going up the middle of the bellhousing/front of case, dogleg transmissions do not have that rib, and are smooth in that area.

The driveline will come out of the back of the transmission, you will just have to pull on it harder.

Longshaft transmissions are 31 inches long from the front of the case to the rear of the tailshaft, shortshafts are 26 inches.

[The Birdman]

I did a bit of cleaning on it and found a Yellow paint marker on the top left that looks an awful lot like "Dat 620 5 sp" under a thick layer of crud, I snapped a pic but it was already being worn off by solvent.

 

The only casting numbers I found were on the shifter cast the number "56"

 

And on the right side was an "L7" next to what I think is the back up switch but only one wire was on it.

 

 

 

It was thick with crud and I've only been able to clean off about 3/4 of it off, I'll have to pick back up on it when time off from work allows.

[The Birdman]

As I understand it, the dogleg pattern has reverse all the way towards the driver and up like so......

But from how it felt, the detent spring which you have to push past in order to get into reverse was on the opposite side towards the passenger like below.

This leads me to believe it's not a dog-leg, but hell I've been wrong before, I'll be wrong again I'm sure! I didn't check to see if the shifter in the left-up position turned differently than the left-low position yet, I'll check that when I can. Got to get up at 3 AM, so I'm out for now.

[trever]

the 71 pl521 1600 is a 2.0L JUST GOT ONE MY SELF  :)  i"ll be learning with you youngster..but these trucks are the most basic an easy to work on guess you have'nt wrenched  just get the truck! we can learn the specs together from an canadian who has the same truck an is doing frame off resto-mod..he is on here  another forem

[Z chopper]

the 71 pl521 1600 is a 2.0L JUST GOT ONE MY SELF  :)  i"ll be learning with you youngster..but these trucks are the most basic an easy to work on guess you have'nt wrenched  just get the truck! we can learn the specs together from an canadian who has the same truck an is doing frame off resto-mod..he is on here  another forem

epic post fail the last post before yours was over 3 years ago

[The Birdman]

epic post fail the last post before yours was over 3 years ago

Lol, I have been away for a while, haven't I? Well since this thread is no longer asleep I guess I'll fill in the blanks a bit. Still been working like a rabid dog, haven't done a damned thing to the truck! I have been keeping my other vehicles maintained so I have at least 3 ways to get to work at all times, that by itself has kept me busy. I now have a buddy that was kicked out by his wife staying here, and he has said he will help me get to work on the Datsun while he's here so I may have some questions and some progress to post soon.

[trever]

lol..serious though.. well..have to spend more time in the garage less in the garden..sun must be getting to me...                                         have the truck home..have to transfer pics from phone to lap top..be up soon thanks for the response back..love the acranim..any body else here wrenching a 70's pl1600 truck..intrested in mods that inhance the stance..air bag..suspention and or motor..air intake ect. what works best 5speed trany conversion..and motor match up? lil' brush up.some body put me up on game please..as aways,RESPECT AN GRADITUDE

[]2eDeYe]

Best bet is to start a project thread in project datto and maybe an introduction in general discussion .:)

[The Birdman]

Update....I recently had a local fab shop put together an engine cradle for the L series motors I have to work on, and was able to get the L-16 for the truck off the old stand and in the cradle today. Now I can put the Flywheel, and clutch assembly together, bolt up the transmission, and get ready to drop it in! Still heavy on the work side, Hollywood goes long hours during the long summer days so I'll be trying to designate my weekends for recoop time and truck progress. Here are some of the pics of the cradle I had made and the swap from the old stand.

[wayno]

That thing looks like it could fall on the ground nose first, be very careful till the tranny is on it.

That is a good looking stand, mine are way bigger, and take up way to much room also, but I make mine to work as test stands, the engine is running in these photos.

 

 

 

[The Birdman]

That thing looks like it could fall on the ground nose first, be very careful till the tranny is on it.

That is a good looking stand, mine are way bigger, and take up way to much room also, but I make mine to work as test stands, the engine is running in these photos.

 

 

 

 

 

Hey thanks Wayno, they did a nice job on it except I gave them a bare block and had to grind a bit off the exhaust side to clear the pipes. It looks a bit nose heavy but it is sitting nicely with no teetering at all. It was built to support both engine and tranny, and I have a little trailer wheel to mount under the tail when it's mounted. Sorry for the long time-out, it is what it is. B)

[banzai510(hainz)]

Birdman why dont you get the PCV tube and hook up to the intake manifold instead of that CAN?  I dont get it? That PCV tube and valve does work and will keep the bay cleaner.

 

Motor looks nice

[The Birdman]

Birdman why dont you get the PCV tube and hook up to the intake manifold instead of that CAN?  I dont get it? That PCV tube and valve does work and will keep the bay cleaner.

 

Motor looks nice

Hey Banzai, sorry for the delay, work 16-17 hour days and nights and sleep becomes a priority! Are you referring to the crankcase breather tube sticking out past the exhaust? How should I plumb that? 

 

Also, I'm about to install the flywheel, clutch assembly and the tranny, is there anything I should be wary of? the clutch and disc are from the original L motor, the tranny is a 620 5-speed swap. Anything I need to make sure of before continuing?

 

[Lockleaf]

Use the throw out bearing collar that matches the clutch set, not the transmission.

[The Birdman]

Use the throw out bearing collar that matches the clutch set, not the transmission.

Oh crap! that means I have to go through a bunch of parts bins if I even have it! what if i cant find the one it came with?

[wayno]

You should use the one that you were using before, it matches the clutch cover.

Oh crap! that means I have to go through a bunch of parts bins if I even have it! what if i cant find the one it came with?

[The Birdman]

You should use the one that you were using before, it matches the clutch cover.

I guess I have to look for it, it was never all together, just a truck full of parts. I'll start looking now, wish me luck! Here is the pressure plate and disc in place.

[The Birdman]

Good thing my show is on stage all week, it gives me some time to work on this beast!

[The Birdman]

So Per Wayno's suggestion I removed the pressure plate and measured it across, got just  at 7"-15/16ths, just under 8" which as I understand would make it a 200mm clutch, right?

[wayno]

That would be 200mm, so you need the tall collar.

[The Birdman]

So maybe I'll get lucky and the collar on the release bearing is right or close, how is it measured? I'll pull it off the shaft and check.

[wayno]

Someone on here has a loose L16 collar/throwout bearing on here, they just need to step up and measure it for you.

I just set it on a flat surface with the bearing down, and I stick the tape measure down the hole to the flat surface and look at what the measurement is at the top of the collar.

There are several different size collars, I don't know what they all are for, but the 200mm collar is fairly tall.

[The Birdman]

I'll pull it out in the morning, thanks again Wayno!

[banzai510(hainz)]

cranck case vent goes to the PVC valve on the lower part of the intake. Nissan dealer should still have this part.