The modern twist-lock style sockets have three tabs that keep it tight in the housing.
Also,they come with an extra wire needed to ground the bulb.If the housing is really crusty,this wire will bypass it for a better ground.

Last edited by 68Cbarge; 09/19/10 04:37 PM.

'68 Newport Custom Barge on a Budget!! BOAB
1973 Satellite WAGON! 318- 3 on the tree!!
2008 Chrysler 300c HEMI!