I bought a speedo cable from a well known vendor, but it didn't include an o-ring and they don't sell it. Does anyone have a part number or know the size? I'd match it up at the parts store, but I don't have the original.

It's for my 1984 F-150 with a NP 4 speed.

 

87036-S94 .. Speedometer Cable O-Ring - 57/64" O.D x 11/16" I.D. / Available from Ford.

Most dealers will have this 'in stock' since it was used beginning in the 1940's on a gazillion different speedo cables.

 

I do not know the answer, Wyowanderer, but it is good to "see" you back online. It has been a while.

 

Answer in post #2.

 

Well, Mr. NumberDummy... it looks like you beat me to the punch by less than a minute and you have the "advantage" of being in California!

 

Look to your local hardware/plumbing supply...an assortment can be purchased for comparison/fitment purposes and are pretty cheap. Ask for Red neoprene
o-rings...they are impervious to fuel, oil and moderate heat exposure. The last kit I purchased was around $8. You'll always have a need for the rest of the
o-rings in the kit around the house and in the garage for sure.

 

Agreed- too long. I've been involved in Amateur radio, for around a year now, and it's a time and money pit.
I'll be back soon.

 

Many thanks and much appreciated, ND.