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QU40221 19 Spline Outer Axle Shaft for 1977 to 1991 Chevy, GMC Corporate GM 10 Bolt Front Axle is a genuine original equipment outer axle stub shaft for all GM 10 Bolt front axles in 1977 to 1991 Chevy Blazers, GMC Jimmys, and Suburbans, plus Chevy, GMC 4x4 1/2 ton and 3/4 ton Pickups. The splined end on these new axle shafts has three snap ring grooves in three places so they are compatible with all types of automatic and manual lockout hubs plus all full-time solid splined drive gears.
Also available while supplies last: QU40221U Used Outer Axle Shaft with 3 snap ring grooves and QU40660UUsed Inner Axle Shafts with 2 snap ring grooves (QU40660U is not compatible with automatic locking hubs)
Vibration is usually caused by drive shaft universal join wear, but could be tires. A bad wheel bearing will usually only make a noise and you would feel a roughness in the cab or the steering wheel. You can check the U-joints by going under the vehicle, grabbing the drive shaft and see if there is lateral play at either end. If it is this, you will cause a lot of damage if it comes loose at either end, so you should deal with it promptly.
You will have to get under the vehicle, and grab the drive shaft at each u-joint. Grab the first one, and move it up, down, and side to side to look for any play. Also pay attention to missing pieces, and missing clips that hold the u-joint in.
Another thing to check is your wheel bearings. Jack the rear up, and grab each tire at 3o'Clock and 9o'clock first, and then 12o'clock and 6o'clock. Wiggle/shake it looking for play. Do the front tires the same way. You should find it.
Do you have the electric shift 4wd? If so, start by checking if there is power to the actuator on the transfer case.
ok you hear a noise in the dash and a noise under the truck. there will
be two noises under the truck one puts the transfer case into gear the
other locks the fromt axle. raise rear axle let truck idle in 4x4 look
under truck is front shaft moveing if yes the 4x4
motor on the front axle is not working remove dissasemble clean lube
reinstall. if the shaft does not turn do this same procedure on the
elec motor on trans case..good luck you can replace your oil pump it may help vehicle
Looking at the motor from the front, it is behind carb and to the right of the distributor. It has 3 wires on it.
sorry lost here ,never seen one but if transmission shaft is turning to front diff then the problem is their,could be anyting from a sheared diff pinion to a broken planet wheel or possible evan a snapped half shaft or the spline on the end of the half shaft has worn and rounded off