Driveline Vibration; Rear Propeller Shaft Assembly; Double Cardan Universal Joint; Single Cardan Universal Joint - Jeep J-10 Series 1982 Technical & Service Manual

2E-2 PROPELLER SHAFT
80331
Fig. 2E-3 Rear Propeller Shaft Assembly-
Cherokee, Wagoneer and Truck Models
The single cardan joint is used for most applications
and consists of a single spider with four sets of needle
bearings, and four bearing seals, bearing caps, and bear
ing cap retainers (fig. 2E-4). Clamp straps are used to
attach the joint to the axle and transfer case yokes.
YOKE
BEARING CAP
SPIDER
RETAINING
CLIP
80333
Fig. 2E-4 Single Cardan Universal Joint
The double cardan joint, also referred to as a constant
velocity joint, consists of two spiders, a socket ball, a
link yoke, a socket spring and dust seal, a socket yoke,
and needle bearings, bearing seals, bearing caps and
bearing retainers for each spider (fig. 2E-5). The double
cardan joint is used for front propeller shaft-to-transfer
case yoke applications on all Cherokee, Wagoneer and
Truck models.
DRIVELINE VIBRATION
Driveline vibration can be divided into two categories:
mechanical or audible. Mechanical vibrations produce
PROPELLER
SHAFT
YOKE
BEARING
CAP
SEAL
SOCKET NEEDLE
BALL BEARINGS
RETAINER \ . \M
THRUST ^O©
WASHER „„., Qr
FRONT
SPIDER
80334
Fig. 2E-5 Double Cardan Universal Joint
visible motion in the fenders, rear view mirror, in
strument panel or steering wheel, or can be felt through
the seats, floorpan or steering wheel. Audible vibrations
are heard or sensed above normal road and background
noise and may be accompanied by mechanical vibration.
In some cases, audible vibration occurs as a droning or
drumming noise while in other cases, it produces a buf
feting sensation that is felt or sensed by the driver
rather than heard.
Driveline vibration may be caused by the front or rear
propeller shafts, axle or transfer case yokes, universal
joints, incorrect front or rear pinion angles, loose en
gine-transmission-transfer case mountings or engine
driven accessories. Mechanical vibration is usually
caused by a damaged or worn driveline component. Au
dible vibrations are usually caused by an incorrect uni
versal joint angle or binding universal joints and are
most noticeable in the 40 to 60 mph (64 to 97 km/h)
speed range.
Vibration caused by a propeller shaft may be the
result of:
• Undercoating on the shaft tube
• Excessive shaft runout
• Cracked or broken shaft seam welds
• Dented, bent or twisted shaft tube
• Worn or damaged shaft bearing yokes
• Loose universal joint clamp strap bolts
•Tight, loose or binding slip yoke
• Tight, worn, binding or damaged universal joint
• Loose yoke retaining nut
Vibration caused by universal joints may be the result
of:
• Loose clamp strap bolts
• Tight, loose, binding or worn slip yoke
• Worn or damaged universal joint spider
• Worn or damaged needle bearings or bearing caps