Why do driveshafts have U joints?
A u-joint, or universal joint, is a component that connects the driveshaft to the differential, and sometimes connects the driveshaft to the transmission or two driveshafts to each other. It’s a cross shaped piece with a bearing at each end, that allows for lateral and side to side movement of the driveshaft.
What are the dimensions of a Sierra rear drive shaft?
The driveshafts themselves come in different lengths and diameters with different numbers of splines. They are available with 23, 25, 26, 27, 28 and 25/27. The drive shafts are different lenghts on both sides of the car. The early 23 splines shafts are the narrowest at 26.95mm and later higher performance models are the thickest at 28.5mm.
What are the bolt flanges on a Sierra rear drive shaft?
CAD drawings of the Tripod shafts can be found here : The Lobro bolt on shafts are also available with two different diameter bolt flanges 100mm (86mm P.C.D.) and 108mm. The bolt flanges are the faces where the shaft meets the differential or hub carrier.
How big is a lobro rear drive shaft?
The Lobro bolt on shafts are also available with two different diameter bolt flanges 100mm (86mm P.C.D.) and 108mm. The bolt flanges are the faces where the shaft meets the differential or hub carrier. So far, the list of drive shaft types is very small: 28 splines inner & outer, length 50.4cm. 7.5″ 28 splines inner & outer, length 46.4cm. 7.5″
Where does the starboard side driveshaft attach to the engine?
Now that the driveshaft is free from the outside axle, it’s time to pull the shaft from the car. The port (left) side shaft attaches directly at the differential. The starboard side driveshaft passes through an intermediate bearing in a race attached to the engine crankcase.
What kind of drive shaft does a Sierra diff have?
The Sierra diff has 2 types of driveshafts: Diffs with Tripod type shafts are designed to be used with Drum Brake equipped hubs, However, it is possible with the use of adapter plates or hybrid shaft / hub combos, to use disc brakes.
CAD drawings of the Tripod shafts can be found here : The Lobro bolt on shafts are also available with two different diameter bolt flanges 100mm (86mm P.C.D.) and 108mm. The bolt flanges are the faces where the shaft meets the differential or hub carrier.
What causes a leak at the drive shaft yoke?
As you can see, its much more obvious from this view that there is a larger area of surface oxidation on the inside of the yoke plug that could cause a much larger leak if left untreated. Photo # 3 shows the repair after the JB weld was applied and hardened.
Where does the fluid come from in the drive shaft?
A few days later the leak reappeared and the owner brought the car to my shop to diagnose the situation. Troubleshooting found the fluid leak coming from the center of the drive shaft yoke (p/n 4841), from an area I’ve never experienced a leak, until now.