Reply To: 62 Cutlass flywheel lightening

[joe_padavano]

[quote quote=11211]When you get your driveline shortened, it’s better to have the back end of the driveline instead of the front end shortened. That way you will partially avoid the acute angles that will arise if the front shaft of the driveline ends up shortened. Also try to set the drive line up so the rear u-joint and differential pinion angle are exactly the same. That’s the important one. Been there, done that…..[/quote]

Sorry, but I have to disagree with this. The rear part of the driveshaft moves constantly due to rear suspension movement. Shortening the rear part makes the u-joint angles more severe during this motion. Once installed, the front driveshaft U-joint angles don’t change since the front driveshaft doesn’t move in response to suspension movement. Certainly check the angles of the U-joints in the shortened driveshaft, but I’ll bet they are nowhere near the angles in the U-joints in the rear driveshaft at the limits of suspension travel.