The correct steering cylinders for a 3400 have a 5/8" rod and a
3000 have a 1/2" rod. The trouble you encounter on a
changeover is the ball joints from a 1/2 rod will not fit onto a
5/8" rod and vice versa. AND the tapered hole in the tie rod
where the ball joint connects is smaller on the 5/8 rod than on
the 1/2" rod. Don't ask me why. The easiest way would be to buy
the correct steering cyls if the seller doesn't want too much.
An alternative is to [b:8c15ee78e1]take the 3400 tie rods to a machine shop and
have those holes reamed with a tapered reamer[/b:8c15ee78e1] then use your
original 3000 ball joints and cylinders.
UD, do you know if the hole in the radius rods will need to be reamed as well? It looks like I will be using the 3000 cylinders when I upgrade to the 3400 axle.