Wednesday, October 28, 2015

The Differential Equation

According to Wikipedia, "a differential equation is a mathematical equation that relates some function with its derivatives."  That sounds about right.

My rear drive had a number of problems, as did its derivatives, otherwise known as the CV boots.  Briefly, most of the seals in the diff leaked.

As did one of the CV boots, the early clear kind with the differential fluid visible inside.

And so all were removed.

A couple of years ago a fellow enthusiast sold me an NOS diff seal kit. They are still available, but almost certainly not in this cool box:

 We also discovered that the old differential mount - yet another derivative - was fried.

Now it was time to take stuff apart.

The inside of the differential looked nice.

The hour arrived to reassemble everything. A special tool was made to aid with installing new CV boots. No heat required to get them back on with this little number.

I was worried that the diff mount might be NLA but no, they even use this version on the E12!  I was also concerned that the metal above this mount would be compromised by rust - this seems to be fairly common with NKs - but my rear structure was still solid after 49 years.

 The differential and CV boots are installed again.

And all is well with the world.

Special thanks to Patrick O'Neil for the work, and for the photography!

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