@Norton posted:Here is a clue. Search on "4mm to 4mm universal". That will bring up a long list some of which will be telescopic. Select the one good for 60-80mm lengths.
BTW Many of the hits for simple U joints can be used to upgrade the couplings in the CC Lionel NYC Niagaras.
Pete
Nice work Pat, As Pete stated above. I've used these RC U -joints on a ton of CC Niagara plastic driveshafts, they work great, pretty much bullet proof !
Alex