A driveshaft is accountable for transferring engine vitality from the tranny to the differential and onto the drive wheels. A driveshaft could be a couple of pieces with a middle Front Drive Shaft support bearing in the middle. There happen to be universal joints at either end of the driveshaft which become flex joints that allow the differential to go upward when the automobile contacts a bump. A front side driveshaft yoke is employed to hook up to the tranny while a backside driveshaft flange is employed to hook up to the differential. On elderly models the rear U joint bolts directly to the differential without by using a rear flange. On front wheel drive vehicles there are two travel shafts which are known as CV axles.
Driveshaft themselves have hardly any problems with the exception of becoming bent if they are exposed to an obstruction. Alternatively the U joints could cause challenges which are part of the driveshaft such as for example chirping and clucking when the car is moving or placed into gear.
Something you should know that may not be thought of is when a driveshaft is taken out the automobile will no longer be in park. The car will roll since 
the link between your drive wheels and tranny is removed. You will need to raise the car up using a floor jack and jackstays. Use protective eyewear and gloves before you begin.
Mark the driveshaft orientation before you begin. This will help gain the driveshaft to its classic job on the differential that may support avoid driveline vibrations after the driveshaft is reinstalled.
Utilizing a plastic hammer softly shock the driveshaft loose via the differential flange simply by striking the trunk yoke (U joint install). At this stage the back 50 % of the shaft will become free so keep hold of it. On some vehicles there will be a centre support which should be undone by eliminating the two centre support installation bolts. When removing an older vehicle drive shaft make use of electric tape to wrap around the u joint cups hence they don’t really fall off and launch the glass needle bearings.
On front wheel travel cars the driveshaft is not used. The transmission and differential is merged into one product called a transaxle.
All shafts are reassembled with new universal joints and CV centering kits with grease fittings and so are then completely greased with the proper lubricant. All shafts will be straightened and pc balanced and tested to closer tolerances than OEM features.
The drive shaft is the part on the low proper side of the picture. The various other end of it might be linked to the transmission.