 | Hydraulic System - The clutch is operated by a hydraulic master /
slave system. The clutch master is mounted under the brake booster on the
left fender well. It is fed off a blue flex hose from the brake master reservoir.
As the blue hose ages it expands and becomes soft. When the hose fails all
of the brake fluid is drained from the reservoir. The clutch master also
fails over time. One of the things to check when the car is cold is the level of
the clutch pedal. If it is low or sticks then the master is bad.
Often when the car is warm the clutch will operate normally. There is a
flex hose that runs from the master to the slave cylinder mounted under the car
n the bell housing. This house can break causing the clutch system to
fail. All of these areas should be checked for leaks.
(Deduct 15 points if the
clutch hydraulic system is leaking, operating improperly and has not been
replaced in the past 10 years)
|
| Clutch - Checking the clutch is about the same on all cars. It
should not chatter when taking off in first. The clutch should not slip
when accelerating in a higher gears. the engine in the 928 is strong
enough to put a lot of stress on the clutch. If when running in 4th or 5th
gear at 2000 RPM, the clutch starts to slip as the car accelerates then it is
bad. Test the clutch for drag by finding a level spot stopping the car,
putting it in first gear and holding the clutch pedal to the floor. If the
car starts to creep then the clutch is dragging.
(Deduct 30 points for any
problems with the clutch or if it has not been changed in the past 50K miles)
|
| Transmission - The transmission should shift smoothly both up and
down. On the older pre 1985 cars it is normal to feel a little hesitation
on the first to second shift. It is also normal for the shift into first
to be a little stiff from time to time. Unfortunately there are no small
transmission problems other than minor leaks.
(Deduct 75 points for noises
and bad syncros. Deduct 10 points for minor leaks)
|
| Torque Tube - Put the car in neutral and depress the clutch and slowly
let it out. There should be very little difference in the noise
level. If there a significant increase in noise, the bearings in the
torque tube are worn and need replacing.
(Deduct 30 points for a noisy torque
tube)
|
| Limited Slip Differential - Some cars came with limited slip
differentials. Limited slip improves handling and is a desired
feature. Jack up the rear of the car and spin the rear tire. If they
spin in different directions then the there is no limited slip option
installed. Do not rely on the option codes. When spinning the wheels
listen for clunking or bearing noises.
(Deduct 30 points for a noisy differential.
Add 20 points for a properly functioning limited slip)
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