Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1739

4C–14

DRIVE SHAFT SYSTEM

Rear Propeller Shaft

 General Description 

401RX00005

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Propeller Shaft

Torque is transmitted from the transmission to the rear
axle through one propeller shaft and universal joint
assemblies. All propeller shafts are the balanced tubular
type. A splined slip joint is provided in some drivelines. 

• Since the propeller shaft is balanced carefully,

welding or any other modification are not permitted.

• Alignment marks should be applied to each propeller

shaft before removal.

• Be sure vehicle is stopped, engine is not running,

brake is secured and vehicle is secured to prevent
injury.

• Be careful not to grip the propeller shaft tube too

tightly in the vise as this will be cause deformation.

Phasing
The propeller shaft is designed and built with the yoke
lugs (ears) in line with each other. This design produces
the smoothest running shaft possible, called phasing.
Vibration can be caused by an out-of-phase propeller
shaft. The propeller shaft will absorb vibrations from
speeding up and slowing down each time the universal
joint spins. This vibration would be the same as a
person snapping a rope and watching the "wave"
reaction flow to the end. A propeller shaft working in
phase would be similar to two persons snapping a rope
at the same time, and watching the "waves" meet and
cancel each other out. In comparison, this would be the
same as the universal joints on a propeller shaft. A total
cancellation of vibration produces a smooth flow of
power in the driveline. It is very important to apply a
reference mark to the propeller shaft before removal, to
assure installation alignment. 

Legend

(1) For Y22SE 4

´2 M/T Model

(2) For 6VD1 Model and Y22SE 4

´2 A/T Model

DRIVE SHAFT SYSTEM

4C–15

Universal Joint

401RW015

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A universal joint consists of two Y-shaped yokes
connected by a crossmember called a spider.
The spider is shaped like a cross. Universal joints are
designed to handle the effects of various loads and front
or rear axle windup during acceleration. Within the
designed angle variations, the universal joint will
operate efficiently and safely. 
If the design angle is changed, the operational life of the
joint may decrease.
The bearings used in universal joints are of the needle
roller type. The needle rollers are held in place on the
trunnions by round bearing cups. The bearing cups are
held in the yokes by snap rings. 

Legend

(1) Spider
(2) Yoke

4C–16

DRIVE SHAFT SYSTEM

Diagnosis of Propeller Shaft and 
Universal Joint

Condition

Possible cause

Correction

Leak at the Front Slip Yoke (An
Occasional Drop of Lubricant
Leaking from the Splined Yoke is
Normal)

Rough surface on splined yoke;
burred nicked or worn.

Replace the seal. Minor burrs can
be Smoothed by careful use of
crocus cloth or fine stone honing.
Replace the yoke if badly burred.

Defective transmission rear oil seal.

Replace  the  transmission  rear  oil
seal and replenish the transmission
oil.

Universal Joint Noise. 

Worn universal joint bearings.

Replace.

Improper lubrication.

Lubricate as directed.

Loose flange bolts.

Tighten to specifications.

Ping, Snap, or Click in Drive Line
(Usually Heard on Initial Load after
the Transmission is in Forward or
Reverse Gear)

Loose bushing bolts on the rear
springs or upper and lower control
arms.

Tighten the bolts to specified torque.

Loose or out-of-phase end yoke.

Remove end yoke, turn 180 degrees
from its original position, lubricate
the splines and reinstall. Tighten the
bolts and pinion nut to specified
torque. 

Squeak

Lack of lubricant.

Lubricate joints and splines. Also
check for worn or brinelled parts.

Shudder on Acceleration (Low
Speed)

Loose or missing bolts at the
flanges.

Replace or tighten bolts to specified
torque.

Incorrectly set front joint angle.

Install  shim  under  the  transmission
support mount to change the front
joint angle.

Worn universal joint.

Replace.

Vibration

Incorrect shaft runout.

Replace.

Shaft out of balance.

Adjust.

Transmission rear housing bushing,
transfer case housing bushing worn.

Replace.

Yoke spline jammed.

Replace.

DRIVE SHAFT SYSTEM

4C–17

Rear Propeller Shaft and Associated Parts

401RX00006

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 Removal 

1. Raise the vehicle on a hoist.

NOTE:  Apply alignment marks on the flange at the rear
propeller shaft both front and rear side.

2. Remove transfer side bolt, nut and washer (4

´4

model only).

3. Remove rear axle side bolt, nut and washer.

4. Remove rear propeller shaft.

NOTE:  Plug the hole of the transmission rear end to
prevent oil leakage (4

´2 model only).

Installation

NOTE:  Never install the shaft assembly backwards.
Never insert bar between yoke lugs when tightening or
removing bolts.
Completely remove the dust or foreign matter from the
connecting surface of flange coupling on each end of
the propeller shaft.

1. Align the mark applied during disassembly.

2. Install rear propeller shaft and tighten the bolts to

the specified torque.

Torque: 63 N·m(46 lb ft)

Legend

(1) Bolt, Nut and Washer (Transfer Side)

(2) Rear Propeller Shaft
(3) Bolt, Nut and Washer (Rear Axle Side)