differential insulator early one

[bartsscooterservice]

13 hours ago, AZ-240z said:

Picture #2 (below) shows the bottom surfaces (front of car points up)... early type (55415-E4102) on the left, later type (55413 E8301) on the right...

Enter “differential insulator” in the search function, and you will find a wealth of information about these

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Are you sure, because my early one, the front of the car is as I pointed in my picture above with the arrow. This drawing also shows that.

So with the later one, which side is pointed towards the FRONT of the car ? 

[bartsscooterservice]

13 hours ago, AZ-240z said:

Picture #2 (below) shows the bottom surfaces (front of car points up)... early type (55415-E4102) on the left, later type (55413 E8301) on the right...

 

My later type is showing part no 55415-N4301 20/08/18 

[bartsscooterservice]

7 hours ago, Zed Head said:

I remember trying to find an illustration for the diff mount and the transmission mount.  The best I could do was to assume that the mounts go in with the sloped side facing forward.  Like a snow plow or a wedge.  I only found one picture that showed that and had to rationalize that the diff mount would be the same.

It seemed to make sense when I was actually looking at the parts before installing.  Here is the only picture that seems to illustrate that, from 1976.  Nissan calls the transmission mount the rear insulator. 

 

Yes..  The later diff was placed back due to vibrations problems, as I read. So if you look at below picture you can clearly see the later mount holes showing that, If I have them placed correctly now, which I assume. If not somebody correct me.

 

[bartsscooterservice]

We did some brainstorming, including heaving the early one remolded, but that would be way to expensive, they will only do it from at least a 1000 pieces. So I decided to modify the later one, back to the early one. I think it worked out. I will test it to make sure, just waiting for the strap to come in first.

I cut the purple, and added to red, so the " slope " is the same, and the holes are on the same spot as the early one. With the purple cut out, you can now put the M12 nut under there.

I could not just simply twist the mount 180 because that would change the angle.. so this was the only way.

Welded the mount with the rubber part of it submerged in some water, so it wouldn't melt..

[bartsscooterservice]

It's in, I did have to shave some more metal of the inside to fit the bolts through and the nut on top like the manual shows.

So it's possible to make the 72 mount to fit like the early one..

[dutchzcarguy]

That diff belt looks like a toothed belt.. like a timing belt of a modern car..    The original belt is much  more robust and stiffer! 

Someone sometime..  fell over that belt and thought: Hey lets use it as a diff arrester belt!   It has always been a bad solution to the problem and this is no improvement.. 

BTW my (Rest in peaces) 1972 240z had one and in good condition.) and my early 1971 does not have that at all!   Maybe someone has a better solution for this arrester belt as Nissan calls them?

 

[Diseazd]

I’m late to this thread, but when the Z Doc in Roanoke, Virginia was still alive, he had a simple solution for the problem of the early mount being NLA. He said, if you take a Series 2 mount and simply rotate it 180 degrees, it works perfectly as a Series 1 mount. Give it a try and see if that works.

Guy

[grannyknot]

On 9/22/2020 at 3:19 AM, bartsscooterservice said:

Welded the mount with the rubber part of it submerged in some water, so it wouldn't melt..

That's a clever trick, I'll have to remember that one.  The mount looks like it will work perfectly.

39 minutes ago, dutchzcarguy said:

 Maybe someone has a better solution for this arrester belt as Nissan calls them?

Sure, it's called the R/T mount, https://www.technoversions.com/DiffMountHome.html?

But if you want to remain original all you have to do is eliminate the space between the top of the diff housing and the bottom of the arrestor strap.  The last time I did it I used two layers of some old rubber conveyor belt I had on hand, it is only about a 1/2" gap so when you raise the diff into place the arrestor strap is snug against the spacer and there is no room for the diff to jump up and make that clunk.

 

[bartsscooterservice]

6 hours ago, Diseazd said:

I’m late to this thread, but when the Z Doc in Roanoke, Virginia was still alive, he had a simple solution for the problem of the early mount being NLA. He said, if you take a Series 2 mount and simply rotate it 180 degrees, it works perfectly as a Series 1 mount. Give it a try and see if that works.

Guy

See my pictures above. You cannot twist the later mount 180. Because it does not line up if you look closely at the picture. And it's also at an angle. 

[bartsscooterservice]

6 hours ago, grannyknot said:

That's a clever trick, I'll have to remember that one.  The mount looks like it will work perfectly.

Sure, it's called the R/T mount, https://www.technoversions.com/DiffMountHome.html?

But if you want to remain original all you have to do is eliminate the space between the top of the diff housing and the bottom of the arrestor strap.  The last time I did it I used two layers of some old rubber conveyor belt I had on hand, it is only about a 1/2" gap so when you raise the diff into place the arrestor strap is snug against the spacer and there is no room for the diff to jump up and make that clunk.

 

Thanks. Yeah it works fine now. Took some modifications.  So it can be done without going with all the hassle of changing the mustache bar etc etc to the later 72 spec

[bartsscooterservice]

7 hours ago, dutchzcarguy said:

That diff belt looks like a toothed belt.. like a timing belt of a modern car..    The original belt is much  more robust and stiffer! 

Someone sometime..  fell over that belt and thought: Hey lets use it as a diff arrester belt!   It has always been a bad solution to the problem and this is no improvement.. 

BTW my (Rest in peaces) 1972 240z had one and in good condition.) and my early 1971 does not have that at all!   Maybe someone has a better solution for this arrester belt as Nissan calls them?

 

Well it's the same dimensions as the old one only a newer material and toothed So it should work Just fine ? I ordered it from the z store...

 

[Clay C]

Late to this and I know you wanted all original but I took my diff in and out about 4 different times trying to get something to work. I had a lot of extra late model parts so I used a later transverse link mount, later mustache bar and a RT Mount...but I had to add a bracket to the RT Mount towards the back so the bushing wouldn’t fall directly on top of the front yoke of the diff. Welded a piece of channel on the RT Mount and moved the bushing back about 3 inches and all is well. I also had the late model drive shaft so I’m hoping that makes up the difference. 

Edited September 26, 2020 by Clay C