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1976 280Z Restoration Project

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I will press out the old u joints and take some measurements. It looks like the 430-10 Rockwell's are the ones I see listed as fitting. (according to Rockwell)

rockwell.JPG

Edited by wheee!

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Nice work. I had a list with yhe 720 pick up and as far as I could tell, the 720 had the same staked uni-joints.

Would be good to have an alternative.

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They write like replacing a staked-in joint is a common thing.  I have seen kits for other brands of cars, that come with a little grinding/cutting tool that cuts out the stake.  But if I recall correctly the yokes for those kits had a groove already in place, that was used for a circlip afterward.  Kind of like the manufacturer staked in a clipped u-joint for some reason.  Cut out the stakes and use the old clips.

Looks like a fun project anyway.

http://www.theujointstore.com/43010.html

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Found the kit.  You can see the groove in his pictures.  https://www.f150forum.com/f72/replacing-staked-u-joints-175529/

Who knows, maybe Nissan ground the flats on the inside of the yoke for an internal clip, but then staked it in. Can't tell what kind of clips the 43-010 uses.

 

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Will have to check when I am home again... darn day job in the way again!

I won't have the bearings for awhile yet anyways. I will press out the old one regardless and get pics etc.

Edited by wheee!

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8 hours ago, wheee! said:

 It looks like the 430-10 Rockwell's are the ones I see listed as fitting. (according to Rockwell)

Just remembered some funny fit business with CV axles, from the past.  When I did a Google on it I found that it's actually gotten worse.  Used to be just a specialty axle house, now it's Autozone.

image.png

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Holy moly.  I took another Google and ended up on RockFORD driveline, not Rockwell.  And found this.  You might be on to something.  Check the other dimensions.  Looks like four possibilities.

Did you just brute-force past the stakes or do some grinding?

http://old.rockforddriveline.com/ujointinside.htm

image.png

 

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Ya, I noticed my dyslexic typo too. Rockford.
I watched a few YouTube videos showing the caps being punched or pressed in and went for it. No big deal, just slower than normal u joints.

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Definitely the 430-10 with the .867" bearing diameter and 1.400" inside lockup.
I will order some u joints and try it out!

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So you're going to assume that the inner dimensions of the yoke are accurately machined, and use the internal clips?  Could work.  Nissan might have found that staking saved clips and time on the manufacturing line.  I hope that there wasn't a final machining step that they skipped also.

One of my early bad car experiences was with u-joints.  Mixing and matching caps and clamps on a GTO driveshaft.  Got so used to the bad vibrations that I didn't realize my wheel was about to fall off.  High school cruising days.  Luckily I had a friend riding with me to chase the wheel down while I stayed with the car in the middle of the road.  We got away with a ton back then.

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From what I read today, staking is a cost and time saving method of assembling the prop shafts. I believe the machining process for the shafts stayed the same from late series one to the S130 vehicles. The inner surface looks well machined in the photos I posted. That and the 280Z shaft has been modded with these u joints many times before me. The fact that they list the 280’s in their catalog for this part is enough reassurance for me to try. Regardless, this shaft was not going back in with the old joints so no loss.

 

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I think they started staking because the smaller u-joints aee easier to fit. The measurements I took were 36mm inside faces, but that was with u-joint still in place so not very accurate. I think the inside is machine accuratly, because it would require less balancing weigths. My concern would be the tolerances used. 36mm could be 36.2 on one and 35.8 on another.

It will be interesting to see how they fit.

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Wow. Neat find. I looked over the info at the website, and all indications are that it (supposedly) will work.

Only thing that looks like a little hokey to me is that there won't be a full surface contact area for the clips. Because of the way the yoke is machined off at an angle like that, only the "tips of the legs" of the clips will be doing any retention. the bottom "U" portion of the clips will be floating in air. Assuming I'm understanding the geometry correctly...

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I'm connecting with Energy Suspension now to see if they have the package deal for the u joints including the Rockford style replacements. They offer a kit for the 76 including the prop shaft, so we will see....

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Nope... The kit from them is half shafts only. There is a part from NAPA locally though for their part number UJS UJ10430 that will fit. It is the SKF u joint so I will order two of those.

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3 hours ago, Captain Obvious said:

Wow. Neat find. I looked over the info at the website, and all indications are that it (supposedly) will work.

Only thing that looks like a little hokey to me is that there won't be a full surface contact area for the clips. Because of the way the yoke is machined off at an angle like that, only the "tips of the legs" of the clips will be doing any retention. the bottom "U" portion of the clips will be floating in air. Assuming I'm understanding the geometry correctly...

That chamfer is a concern of mine too. You could slide the circlip around the cup so it gets maximum contact. You would need enough clearance around the back of the cup. Sometimes the distance is too small and the circlip jams between the cup and yoke.

I came across the rockford 430-10 some 6 years back when I was cleaning my propeller shaft aftrr rebuilding the transmission. A company had them in a ad for 82-83 720 pick up and the dimensions looked good for the 280Z.

The other thing that needs to be checked is the inside distance "B" in post 1861. Is the tolerance of this distance suitable to fit inner circlip u-joints? Could be batches out there with distances like 35.8mm or 36.3mm. That could cause a problem.

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Probably won't really know until you get the parts.  Might end up as garage art.  Or, maybe, the clips will center the joint well enough that you feel comfortable restaking from the outside. 

If the fit is an interference fit you might even run with no stakes and no clips.  One of those things that you "know" is fine, calculations wise, but still makes you nervous.  You already know that the original stakes weren't really that strong.

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I guess we will see. I have ordered the parts from NAPA and they should be here in a few days. Hopefully I will have stripped and powder coated prop shaft ready to put them in by then too.

I MAY remove a small amount of material in the chamfer area to sea the clip better if it needs it. I don't like messing with a balanced part though....

Edited by wheee!

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Mark,

I was looking back through the thread at your sound deadening. I didn't see what brand you bought. Do you like it? Any strong odors? Any peeling?

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Mark,
I was looking back through the thread at your sound deadening. I didn't see what brand you bought. Do you like it? Any strong odors? Any peeling?

https://www.b-quiet.com/

Love it. Low cost, no odour (butyl ultimate product) and sticks like rumours to Trump’s administration.
  • Thanks 1

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1 hour ago, wheee! said:


https://www.b-quiet.com/

Love it. Low cost, no odour (butyl ultimate product) and sticks like rumours to Trump’s administration.

Thanks. I have been looking online but the reviews are all over the place. Evidently if you mess up and use the wrong product you end up with a sticky gooey mess  :blink:

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