inner cv joint keeps exploding! help!

[rossbarry1]

my inner cv went bang about a week ago, i changed it and was sweet for about 50 miles then its gone bang again, both times doing relatively low speeds not accelerating hard etc. what could cause this, the car is pretty low but jeez. 

[danny_p]

short shaft or long shaft ?

[EsSeX dAn]

cheap cv joint or did you get a oem one?

[danny_p]

cheep joints on the short shaft tend to fail quick on low cars

[AlexMozza]

Were they fitted correctly, as in the splines all the way in and greased etc??