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differential insulator early one


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I was hoping someone might have one left here as a spare or something willing to sell?

Really want to keep it original with a new strap. At least the straps are still sold..

I now welded the old mount together but this will give vibrations. It's just temporary to keep the diff nose in place.

If I can't find the early mount then i will have to look for a solution to insulate the early type mount another way. ?

 

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The one I previously offered is tentatively now slated for use on an early 70 project I’m working on this winter. If I can convince the customer to “upgrade” to the later diff position to straighten the axle geometry, then this isolator will become available, but I won’t know that for a few weeks or months. Maybe not much help, but at least there is some hope.

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How different are they?  Could somebody enlarge or move the holes on a newer one to get it to work correctly in the older application? 

If you have both maybe you could take some measurements and add to your modification program.

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On 8/29/2020 at 7:44 PM, Zed Head said:

How different are they?  Could somebody enlarge or move the holes on a newer one to get it to work correctly in the older application? 

If you have both maybe you could take some measurements and add to your modification program.

I will let it know here if it works. 

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  • 2 weeks later...

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

insulators.

S30 Differential - Front Mount Insulators - OE - 240Z early vs late - bottom.jpgx

Edited by AZ-240z
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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. 

image.png

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On 8/29/2020 at 7:16 AM, zKars said:

The one I previously offered is tentatively now slated for use on an early 70 project I’m working on this winter. If I can convince the customer to “upgrade” to the later diff position to straighten the axle geometry, then this isolator will become available, but I won’t know that for a few weeks or months. Maybe not much help, but at least there is some hope.

Seems “we” are staying stock so the one I have is off the table. 

Hmmm... I “could” chop the crossmember up and weld it back together with the center “offset” forward, that let’s me use the later isolator....  Done that to standard Z trans x-members to fit the T-5 transmission. Not exactly an invisible modification, but likely workable.

Or,  If it wouldn’t melt the rubber, I could weld/move/adjust the position of the diff mounting holes on a later isolator to let you use it. Very slow welding with rapid cold water immersion every 5 seconds of welding????  

Where there’s a will, there’s a way; and relatives.... 

 

Edited by zKars
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