914-6 CV joint. Same as 914-4? Options

[914chris]

I was wondering if there are any differences between the 914-6 and 914-4 CV joints. Also if the axles are different?
I think I may have a bad CV. I am taking them apart and cleaning and re-gresing them, but with the 914-4 CV out of production I am wondering if the 914-6 people are in the same boat. Thank you for the info.

[GeorgeRud]

I just checked my old 914 factory parts book, and they have different part numbers for the -4 and -6 complete axle assemblies, but only one part number for the actual CV joint. I would take that to infer that they are the same. I'll have to measure my axles as I have both and see if there is any difference in diameter or other noticeable difference between the two. I know they do interchange with no problem.

[LvSteveH]

I would take that to infer that they are the same.

You can infer until the cows come home, still won't make it so. The entire assembly is interchangeable, but a four CV will not work with a six axle, and visa versa. Aside from the different spline count, the last set I compared had a different ball size between the four and six, but I doubt one was any better than the other.

For all practical purposes, the best bet today for a six owner in need of CV's is to round up a set of 914-4 axles and go with the CV's that Eric and Mueller are offering. The price is very reasonable, and they will last an extremely long time in a daily driver. For a high hp setup like a big six, suby, or V8 it would be worth going to a stronger CV setup if using the 901 trans. For everyone else it's a perfect solution.