I have a 49 GMC 3/4 ton truck which I believe the commercial diff in it. It has 8 hole wheels. Is there anyone that can give me some info about swapping out the 3rd member to about a 3:42 gear. My diff that is in it now is not a enclosed driveshaft. It is enclosed from the trans to the carrier brg, and open from the carrier brg to the rear end, all stock. Currently it has 4:56 gears.
Last edited by medic8492; 08/27/2010 2:07 PM.
